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git: update to v2.29.1
[cgit.git] / cgit.c
diff --git a/cgit.c b/cgit.c
index 2ccf8646a5e5867632b5dcf6b2e15cbacd16f9f1..08d81a1d4b632af9b725a0a2dbf553cff4d3e6b7 100644 (file)
--- a/cgit.c
+++ b/cgit.c
@@ -1,7 +1,6 @@
 /* cgit.c: cgi for the git scm
  *
 /* cgit.c: cgi for the git scm
  *
- * Copyright (C) 2006 Lars Hjemli
- * Copyright (C) 2010, 2012 Jason A. Donenfeld <Jason@zx2c4.com>
+ * Copyright (C) 2006-2014 cgit Development Team <cgit@lists.zx2c4.com>
  *
  * Licensed under GNU General Public License v2
  *   (see COPYING for full license text)
  *
  * Licensed under GNU General Public License v2
  *   (see COPYING for full license text)
@@ -14,52 +13,35 @@
 #include "html.h"
 #include "ui-shared.h"
 #include "ui-stats.h"
 #include "html.h"
 #include "ui-shared.h"
 #include "ui-stats.h"
+#include "ui-blob.h"
+#include "ui-summary.h"
 #include "scan-tree.h"
 
 const char *cgit_version = CGIT_VERSION;
 
 #include "scan-tree.h"
 
 const char *cgit_version = CGIT_VERSION;
 
-void add_mimetype(const char *name, const char *value)
+__attribute__((constructor))
+static void constructor_environment()
 {
 {
-       struct string_list_item *item;
-
-       item = string_list_insert(&ctx.cfg.mimetypes, xstrdup(name));
-       item->util = xstrdup(value);
+       /* Do not look in /etc/ for gitconfig and gitattributes. */
+       setenv("GIT_CONFIG_NOSYSTEM", "1", 1);
+       setenv("GIT_ATTR_NOSYSTEM", "1", 1);
+       unsetenv("HOME");
+       unsetenv("XDG_CONFIG_HOME");
 }
 
 }
 
-struct cgit_filter *new_filter(const char *cmd, filter_type filtertype)
+static void add_mimetype(const char *name, const char *value)
 {
 {
-       struct cgit_filter *f;
-       int args_size = 0;
-       int extra_args;
-
-       if (!cmd || !cmd[0])
-               return NULL;
-
-       switch (filtertype) {
-               case SOURCE:
-                       extra_args = 1;
-                       break;
-
-               case ABOUT:
-               case COMMIT:
-               default:
-                       extra_args = 0;
-                       break;
-       }
+       struct string_list_item *item;
 
 
-       f = xmalloc(sizeof(struct cgit_filter));
-       f->cmd = xstrdup(cmd);
-       args_size = (2 + extra_args) * sizeof(char *);
-       f->argv = xmalloc(args_size);
-       memset(f->argv, 0, args_size);
-       f->argv[0] = f->cmd;
-       return f;
+       item = string_list_insert(&ctx.cfg.mimetypes, name);
+       item->util = xstrdup(value);
 }
 
 static void process_cached_repolist(const char *path);
 
 }
 
 static void process_cached_repolist(const char *path);
 
-void repo_config(struct cgit_repo *repo, const char *name, const char *value)
+static void repo_config(struct cgit_repo *repo, const char *name, const char *value)
 {
 {
+       const char *path;
        struct string_list_item *item;
 
        if (!strcmp(name, "name"))
        struct string_list_item *item;
 
        if (!strcmp(name, "name"))
@@ -70,10 +52,16 @@ void repo_config(struct cgit_repo *repo, const char *name, const char *value)
                repo->desc = xstrdup(value);
        else if (!strcmp(name, "owner"))
                repo->owner = xstrdup(value);
                repo->desc = xstrdup(value);
        else if (!strcmp(name, "owner"))
                repo->owner = xstrdup(value);
+       else if (!strcmp(name, "homepage"))
+               repo->homepage = xstrdup(value);
        else if (!strcmp(name, "defbranch"))
                repo->defbranch = xstrdup(value);
        else if (!strcmp(name, "defbranch"))
                repo->defbranch = xstrdup(value);
+       else if (!strcmp(name, "extra-head-content"))
+               repo->extra_head_content = xstrdup(value);
        else if (!strcmp(name, "snapshots"))
                repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
        else if (!strcmp(name, "snapshots"))
                repo->snapshots = ctx.cfg.snapshots & cgit_parse_snapshots_mask(value);
+       else if (!strcmp(name, "enable-blame"))
+               repo->enable_blame = atoi(value);
        else if (!strcmp(name, "enable-commit-graph"))
                repo->enable_commit_graph = atoi(value);
        else if (!strcmp(name, "enable-log-filecount"))
        else if (!strcmp(name, "enable-commit-graph"))
                repo->enable_commit_graph = atoi(value);
        else if (!strcmp(name, "enable-log-filecount"))
@@ -84,7 +72,14 @@ void repo_config(struct cgit_repo *repo, const char *name, const char *value)
                repo->enable_remote_branches = atoi(value);
        else if (!strcmp(name, "enable-subject-links"))
                repo->enable_subject_links = atoi(value);
                repo->enable_remote_branches = atoi(value);
        else if (!strcmp(name, "enable-subject-links"))
                repo->enable_subject_links = atoi(value);
-       else if (!strcmp(name, "commit-sort")) {
+       else if (!strcmp(name, "enable-html-serving"))
+               repo->enable_html_serving = atoi(value);
+       else if (!strcmp(name, "branch-sort")) {
+               if (!strcmp(value, "age"))
+                       repo->branch_sort = 1;
+               if (!strcmp(value, "name"))
+                       repo->branch_sort = 0;
+       } else if (!strcmp(name, "commit-sort")) {
                if (!strcmp(value, "date"))
                        repo->commit_sort = 1;
                if (!strcmp(value, "topo"))
                if (!strcmp(value, "date"))
                        repo->commit_sort = 1;
                if (!strcmp(value, "topo"))
@@ -93,39 +88,53 @@ void repo_config(struct cgit_repo *repo, const char *name, const char *value)
                repo->max_stats = cgit_find_stats_period(value, NULL);
        else if (!strcmp(name, "module-link"))
                repo->module_link= xstrdup(value);
                repo->max_stats = cgit_find_stats_period(value, NULL);
        else if (!strcmp(name, "module-link"))
                repo->module_link= xstrdup(value);
-       else if (!prefixcmp(name, "module-link.")) {
-               item = string_list_append(&repo->submodules, name + 12);
+       else if (skip_prefix(name, "module-link.", &path)) {
+               item = string_list_append(&repo->submodules, xstrdup(path));
                item->util = xstrdup(value);
        } else if (!strcmp(name, "section"))
                repo->section = xstrdup(value);
                item->util = xstrdup(value);
        } else if (!strcmp(name, "section"))
                repo->section = xstrdup(value);
-       else if (!strcmp(name, "readme") && value != NULL)
-               repo->readme = xstrdup(value);
-       else if (!strcmp(name, "logo") && value != NULL)
+       else if (!strcmp(name, "snapshot-prefix"))
+               repo->snapshot_prefix = xstrdup(value);
+       else if (!strcmp(name, "readme") && value != NULL) {
+               if (repo->readme.items == ctx.cfg.readme.items)
+                       memset(&repo->readme, 0, sizeof(repo->readme));
+               string_list_append(&repo->readme, xstrdup(value));
+       } else if (!strcmp(name, "logo") && value != NULL)
                repo->logo = xstrdup(value);
        else if (!strcmp(name, "logo-link") && value != NULL)
                repo->logo_link = xstrdup(value);
                repo->logo = xstrdup(value);
        else if (!strcmp(name, "logo-link") && value != NULL)
                repo->logo_link = xstrdup(value);
+       else if (!strcmp(name, "hide"))
+               repo->hide = atoi(value);
+       else if (!strcmp(name, "ignore"))
+               repo->ignore = atoi(value);
        else if (ctx.cfg.enable_filter_overrides) {
                if (!strcmp(name, "about-filter"))
        else if (ctx.cfg.enable_filter_overrides) {
                if (!strcmp(name, "about-filter"))
-                       repo->about_filter = new_filter(value, ABOUT);
+                       repo->about_filter = cgit_new_filter(value, ABOUT);
                else if (!strcmp(name, "commit-filter"))
                else if (!strcmp(name, "commit-filter"))
-                       repo->commit_filter = new_filter(value, COMMIT);
+                       repo->commit_filter = cgit_new_filter(value, COMMIT);
                else if (!strcmp(name, "source-filter"))
                else if (!strcmp(name, "source-filter"))
-                       repo->source_filter = new_filter(value, SOURCE);
+                       repo->source_filter = cgit_new_filter(value, SOURCE);
+               else if (!strcmp(name, "email-filter"))
+                       repo->email_filter = cgit_new_filter(value, EMAIL);
+               else if (!strcmp(name, "owner-filter"))
+                       repo->owner_filter = cgit_new_filter(value, OWNER);
        }
 }
 
        }
 }
 
-void config_cb(const char *name, const char *value)
+static void config_cb(const char *name, const char *value)
 {
 {
-       if (!strcmp(name, "section") || !strcmp(name, "repo.group"))
+       const char *arg;
+
+       if (!strcmp(name, "section"))
                ctx.cfg.section = xstrdup(value);
        else if (!strcmp(name, "repo.url"))
                ctx.repo = cgit_add_repo(value);
        else if (ctx.repo && !strcmp(name, "repo.path"))
                ctx.repo->path = trim_end(value, '/');
                ctx.cfg.section = xstrdup(value);
        else if (!strcmp(name, "repo.url"))
                ctx.repo = cgit_add_repo(value);
        else if (ctx.repo && !strcmp(name, "repo.path"))
                ctx.repo->path = trim_end(value, '/');
-       else if (ctx.repo && !prefixcmp(name, "repo."))
-               repo_config(ctx.repo, name + 5, value);
+       else if (ctx.repo && skip_prefix(name, "repo.", &arg))
+               repo_config(ctx.repo, arg, value);
        else if (!strcmp(name, "readme"))
        else if (!strcmp(name, "readme"))
-               ctx.cfg.readme = xstrdup(value);
+               string_list_append(&ctx.cfg.readme, xstrdup(value));
        else if (!strcmp(name, "root-title"))
                ctx.cfg.root_title = xstrdup(value);
        else if (!strcmp(name, "root-desc"))
        else if (!strcmp(name, "root-title"))
                ctx.cfg.root_title = xstrdup(value);
        else if (!strcmp(name, "root-desc"))
@@ -144,22 +153,14 @@ void config_cb(const char *name, const char *value)
                ctx.cfg.header = xstrdup(value);
        else if (!strcmp(name, "logo"))
                ctx.cfg.logo = xstrdup(value);
                ctx.cfg.header = xstrdup(value);
        else if (!strcmp(name, "logo"))
                ctx.cfg.logo = xstrdup(value);
-       else if (!strcmp(name, "index-header"))
-               ctx.cfg.index_header = xstrdup(value);
-       else if (!strcmp(name, "index-info"))
-               ctx.cfg.index_info = xstrdup(value);
        else if (!strcmp(name, "logo-link"))
                ctx.cfg.logo_link = xstrdup(value);
        else if (!strcmp(name, "module-link"))
                ctx.cfg.module_link = xstrdup(value);
        else if (!strcmp(name, "strict-export"))
                ctx.cfg.strict_export = xstrdup(value);
        else if (!strcmp(name, "logo-link"))
                ctx.cfg.logo_link = xstrdup(value);
        else if (!strcmp(name, "module-link"))
                ctx.cfg.module_link = xstrdup(value);
        else if (!strcmp(name, "strict-export"))
                ctx.cfg.strict_export = xstrdup(value);
-       else if (!strcmp(name, "virtual-root")) {
-               ctx.cfg.virtual_root = trim_end(value, '/');
-               if (!ctx.cfg.virtual_root && (!strcmp(value, "/")))
-                       ctx.cfg.virtual_root = "";
-       } else if (!strcmp(name, "nocache"))
-               ctx.cfg.nocache = atoi(value);
+       else if (!strcmp(name, "virtual-root"))
+               ctx.cfg.virtual_root = ensure_end(value, '/');
        else if (!strcmp(name, "noplainemail"))
                ctx.cfg.noplainemail = atoi(value);
        else if (!strcmp(name, "noheader"))
        else if (!strcmp(name, "noplainemail"))
                ctx.cfg.noplainemail = atoi(value);
        else if (!strcmp(name, "noheader"))
@@ -168,12 +169,16 @@ void config_cb(const char *name, const char *value)
                ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
        else if (!strcmp(name, "enable-filter-overrides"))
                ctx.cfg.enable_filter_overrides = atoi(value);
                ctx.cfg.snapshots = cgit_parse_snapshots_mask(value);
        else if (!strcmp(name, "enable-filter-overrides"))
                ctx.cfg.enable_filter_overrides = atoi(value);
+       else if (!strcmp(name, "enable-follow-links"))
+               ctx.cfg.enable_follow_links = atoi(value);
        else if (!strcmp(name, "enable-http-clone"))
                ctx.cfg.enable_http_clone = atoi(value);
        else if (!strcmp(name, "enable-index-links"))
                ctx.cfg.enable_index_links = atoi(value);
        else if (!strcmp(name, "enable-index-owner"))
                ctx.cfg.enable_index_owner = atoi(value);
        else if (!strcmp(name, "enable-http-clone"))
                ctx.cfg.enable_http_clone = atoi(value);
        else if (!strcmp(name, "enable-index-links"))
                ctx.cfg.enable_index_links = atoi(value);
        else if (!strcmp(name, "enable-index-owner"))
                ctx.cfg.enable_index_owner = atoi(value);
+       else if (!strcmp(name, "enable-blame"))
+               ctx.cfg.enable_blame = atoi(value);
        else if (!strcmp(name, "enable-commit-graph"))
                ctx.cfg.enable_commit_graph = atoi(value);
        else if (!strcmp(name, "enable-log-filecount"))
        else if (!strcmp(name, "enable-commit-graph"))
                ctx.cfg.enable_commit_graph = atoi(value);
        else if (!strcmp(name, "enable-log-filecount"))
@@ -184,6 +189,8 @@ void config_cb(const char *name, const char *value)
                ctx.cfg.enable_remote_branches = atoi(value);
        else if (!strcmp(name, "enable-subject-links"))
                ctx.cfg.enable_subject_links = atoi(value);
                ctx.cfg.enable_remote_branches = atoi(value);
        else if (!strcmp(name, "enable-subject-links"))
                ctx.cfg.enable_subject_links = atoi(value);
+       else if (!strcmp(name, "enable-html-serving"))
+               ctx.cfg.enable_html_serving = atoi(value);
        else if (!strcmp(name, "enable-tree-linenumbers"))
                ctx.cfg.enable_tree_linenumbers = atoi(value);
        else if (!strcmp(name, "enable-git-config"))
        else if (!strcmp(name, "enable-tree-linenumbers"))
                ctx.cfg.enable_tree_linenumbers = atoi(value);
        else if (!strcmp(name, "enable-git-config"))
@@ -204,12 +211,22 @@ void config_cb(const char *name, const char *value)
                ctx.cfg.cache_static_ttl = atoi(value);
        else if (!strcmp(name, "cache-dynamic-ttl"))
                ctx.cfg.cache_dynamic_ttl = atoi(value);
                ctx.cfg.cache_static_ttl = atoi(value);
        else if (!strcmp(name, "cache-dynamic-ttl"))
                ctx.cfg.cache_dynamic_ttl = atoi(value);
+       else if (!strcmp(name, "cache-about-ttl"))
+               ctx.cfg.cache_about_ttl = atoi(value);
+       else if (!strcmp(name, "cache-snapshot-ttl"))
+               ctx.cfg.cache_snapshot_ttl = atoi(value);
        else if (!strcmp(name, "case-sensitive-sort"))
                ctx.cfg.case_sensitive_sort = atoi(value);
        else if (!strcmp(name, "about-filter"))
        else if (!strcmp(name, "case-sensitive-sort"))
                ctx.cfg.case_sensitive_sort = atoi(value);
        else if (!strcmp(name, "about-filter"))
-               ctx.cfg.about_filter = new_filter(value, ABOUT);
+               ctx.cfg.about_filter = cgit_new_filter(value, ABOUT);
        else if (!strcmp(name, "commit-filter"))
        else if (!strcmp(name, "commit-filter"))
-               ctx.cfg.commit_filter = new_filter(value, COMMIT);
+               ctx.cfg.commit_filter = cgit_new_filter(value, COMMIT);
+       else if (!strcmp(name, "email-filter"))
+               ctx.cfg.email_filter = cgit_new_filter(value, EMAIL);
+       else if (!strcmp(name, "owner-filter"))
+               ctx.cfg.owner_filter = cgit_new_filter(value, OWNER);
+       else if (!strcmp(name, "auth-filter"))
+               ctx.cfg.auth_filter = cgit_new_filter(value, AUTH);
        else if (!strcmp(name, "embedded"))
                ctx.cfg.embedded = atoi(value);
        else if (!strcmp(name, "max-atom-items"))
        else if (!strcmp(name, "embedded"))
                ctx.cfg.embedded = atoi(value);
        else if (!strcmp(name, "max-atom-items"))
@@ -227,7 +244,7 @@ void config_cb(const char *name, const char *value)
        else if (!strcmp(name, "project-list"))
                ctx.cfg.project_list = xstrdup(expand_macros(value));
        else if (!strcmp(name, "scan-path"))
        else if (!strcmp(name, "project-list"))
                ctx.cfg.project_list = xstrdup(expand_macros(value));
        else if (!strcmp(name, "scan-path"))
-               if (!ctx.cfg.nocache && ctx.cfg.cache_size)
+               if (ctx.cfg.cache_size)
                        process_cached_repolist(expand_macros(value));
                else if (ctx.cfg.project_list)
                        scan_projects(expand_macros(value),
                        process_cached_repolist(expand_macros(value));
                else if (ctx.cfg.project_list)
                        scan_projects(expand_macros(value),
@@ -243,7 +260,7 @@ void config_cb(const char *name, const char *value)
        else if (!strcmp(name, "section-sort"))
                ctx.cfg.section_sort = atoi(value);
        else if (!strcmp(name, "source-filter"))
        else if (!strcmp(name, "section-sort"))
                ctx.cfg.section_sort = atoi(value);
        else if (!strcmp(name, "source-filter"))
-               ctx.cfg.source_filter = new_filter(value, SOURCE);
+               ctx.cfg.source_filter = cgit_new_filter(value, SOURCE);
        else if (!strcmp(name, "summary-log"))
                ctx.cfg.summary_log = atoi(value);
        else if (!strcmp(name, "summary-branches"))
        else if (!strcmp(name, "summary-log"))
                ctx.cfg.summary_log = atoi(value);
        else if (!strcmp(name, "summary-branches"))
@@ -251,7 +268,7 @@ void config_cb(const char *name, const char *value)
        else if (!strcmp(name, "summary-tags"))
                ctx.cfg.summary_tags = atoi(value);
        else if (!strcmp(name, "side-by-side-diffs"))
        else if (!strcmp(name, "summary-tags"))
                ctx.cfg.summary_tags = atoi(value);
        else if (!strcmp(name, "side-by-side-diffs"))
-               ctx.cfg.ssdiff = atoi(value);
+               ctx.cfg.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
        else if (!strcmp(name, "agefile"))
                ctx.cfg.agefile = xstrdup(value);
        else if (!strcmp(name, "mimetype-file"))
        else if (!strcmp(name, "agefile"))
                ctx.cfg.agefile = xstrdup(value);
        else if (!strcmp(name, "mimetype-file"))
@@ -273,8 +290,13 @@ void config_cb(const char *name, const char *value)
                        ctx.cfg.commit_sort = 1;
                if (!strcmp(value, "topo"))
                        ctx.cfg.commit_sort = 2;
                        ctx.cfg.commit_sort = 1;
                if (!strcmp(value, "topo"))
                        ctx.cfg.commit_sort = 2;
-       } else if (!prefixcmp(name, "mimetype."))
-               add_mimetype(name + 9, value);
+       } else if (!strcmp(name, "branch-sort")) {
+               if (!strcmp(value, "age"))
+                       ctx.cfg.branch_sort = 1;
+               if (!strcmp(value, "name"))
+                       ctx.cfg.branch_sort = 0;
+       } else if (skip_prefix(name, "mimetype.", &arg))
+               add_mimetype(arg, value);
        else if (!strcmp(name, "include"))
                parse_configfile(expand_macros(value), config_cb);
 }
        else if (!strcmp(name, "include"))
                parse_configfile(expand_macros(value), config_cb);
 }
@@ -302,110 +324,117 @@ static void querystring_cb(const char *name, const char *value)
                ctx.qry.head = xstrdup(value);
                ctx.qry.has_symref = 1;
        } else if (!strcmp(name, "id")) {
                ctx.qry.head = xstrdup(value);
                ctx.qry.has_symref = 1;
        } else if (!strcmp(name, "id")) {
-               ctx.qry.sha1 = xstrdup(value);
-               ctx.qry.has_sha1 = 1;
+               ctx.qry.oid = xstrdup(value);
+               ctx.qry.has_oid = 1;
        } else if (!strcmp(name, "id2")) {
        } else if (!strcmp(name, "id2")) {
-               ctx.qry.sha2 = xstrdup(value);
-               ctx.qry.has_sha1 = 1;
+               ctx.qry.oid2 = xstrdup(value);
+               ctx.qry.has_oid = 1;
        } else if (!strcmp(name, "ofs")) {
                ctx.qry.ofs = atoi(value);
        } else if (!strcmp(name, "path")) {
                ctx.qry.path = trim_end(value, '/');
        } else if (!strcmp(name, "name")) {
                ctx.qry.name = xstrdup(value);
        } else if (!strcmp(name, "ofs")) {
                ctx.qry.ofs = atoi(value);
        } else if (!strcmp(name, "path")) {
                ctx.qry.path = trim_end(value, '/');
        } else if (!strcmp(name, "name")) {
                ctx.qry.name = xstrdup(value);
-       } else if (!strcmp(name, "mimetype")) {
-               ctx.qry.mimetype = xstrdup(value);
        } else if (!strcmp(name, "s")) {
                ctx.qry.sort = xstrdup(value);
        } else if (!strcmp(name, "showmsg")) {
                ctx.qry.showmsg = atoi(value);
        } else if (!strcmp(name, "period")) {
                ctx.qry.period = xstrdup(value);
        } else if (!strcmp(name, "s")) {
                ctx.qry.sort = xstrdup(value);
        } else if (!strcmp(name, "showmsg")) {
                ctx.qry.showmsg = atoi(value);
        } else if (!strcmp(name, "period")) {
                ctx.qry.period = xstrdup(value);
+       } else if (!strcmp(name, "dt")) {
+               ctx.qry.difftype = atoi(value);
+               ctx.qry.has_difftype = 1;
        } else if (!strcmp(name, "ss")) {
        } else if (!strcmp(name, "ss")) {
-               ctx.qry.ssdiff = atoi(value);
-               ctx.qry.has_ssdiff = 1;
+               /* No longer generated, but there may be links out there. */
+               ctx.qry.difftype = atoi(value) ? DIFF_SSDIFF : DIFF_UNIFIED;
+               ctx.qry.has_difftype = 1;
        } else if (!strcmp(name, "all")) {
                ctx.qry.show_all = atoi(value);
        } else if (!strcmp(name, "context")) {
                ctx.qry.context = atoi(value);
        } else if (!strcmp(name, "ignorews")) {
                ctx.qry.ignorews = atoi(value);
        } else if (!strcmp(name, "all")) {
                ctx.qry.show_all = atoi(value);
        } else if (!strcmp(name, "context")) {
                ctx.qry.context = atoi(value);
        } else if (!strcmp(name, "ignorews")) {
                ctx.qry.ignorews = atoi(value);
+       } else if (!strcmp(name, "follow")) {
+               ctx.qry.follow = atoi(value);
        }
 }
 
        }
 }
 
-char *xstrdupn(const char *str)
-{
-       return (str ? xstrdup(str) : NULL);
-}
-
-static void prepare_context(struct cgit_context *ctx)
+static void prepare_context(void)
 {
 {
-       memset(ctx, 0, sizeof(*ctx));
-       ctx->cfg.agefile = "info/web/last-modified";
-       ctx->cfg.nocache = 0;
-       ctx->cfg.cache_size = 0;
-       ctx->cfg.cache_dynamic_ttl = 5;
-       ctx->cfg.cache_max_create_time = 5;
-       ctx->cfg.cache_repo_ttl = 5;
-       ctx->cfg.cache_root = CGIT_CACHE_ROOT;
-       ctx->cfg.cache_root_ttl = 5;
-       ctx->cfg.cache_scanrc_ttl = 15;
-       ctx->cfg.cache_static_ttl = -1;
-       ctx->cfg.case_sensitive_sort = 1;
-       ctx->cfg.css = "/cgit.css";
-       ctx->cfg.logo = "/cgit.png";
-       ctx->cfg.local_time = 0;
-       ctx->cfg.enable_http_clone = 1;
-       ctx->cfg.enable_index_owner = 1;
-       ctx->cfg.enable_tree_linenumbers = 1;
-       ctx->cfg.enable_git_config = 0;
-       ctx->cfg.max_repo_count = 50;
-       ctx->cfg.max_commit_count = 50;
-       ctx->cfg.max_lock_attempts = 5;
-       ctx->cfg.max_msg_len = 80;
-       ctx->cfg.max_repodesc_len = 80;
-       ctx->cfg.max_blob_size = 0;
-       ctx->cfg.max_stats = 0;
-       ctx->cfg.project_list = NULL;
-       ctx->cfg.renamelimit = -1;
-       ctx->cfg.remove_suffix = 0;
-       ctx->cfg.robots = "index, nofollow";
-       ctx->cfg.root_title = "Git repository browser";
-       ctx->cfg.root_desc = "a fast webinterface for the git dscm";
-       ctx->cfg.scan_hidden_path = 0;
-       ctx->cfg.script_name = CGIT_SCRIPT_NAME;
-       ctx->cfg.section = "";
-       ctx->cfg.repository_sort = "name";
-       ctx->cfg.section_sort = 1;
-       ctx->cfg.summary_branches = 10;
-       ctx->cfg.summary_log = 10;
-       ctx->cfg.summary_tags = 10;
-       ctx->cfg.max_atom_items = 10;
-       ctx->cfg.ssdiff = 0;
-       ctx->env.cgit_config = xstrdupn(getenv("CGIT_CONFIG"));
-       ctx->env.http_host = xstrdupn(getenv("HTTP_HOST"));
-       ctx->env.https = xstrdupn(getenv("HTTPS"));
-       ctx->env.no_http = xstrdupn(getenv("NO_HTTP"));
-       ctx->env.path_info = xstrdupn(getenv("PATH_INFO"));
-       ctx->env.query_string = xstrdupn(getenv("QUERY_STRING"));
-       ctx->env.request_method = xstrdupn(getenv("REQUEST_METHOD"));
-       ctx->env.script_name = xstrdupn(getenv("SCRIPT_NAME"));
-       ctx->env.server_name = xstrdupn(getenv("SERVER_NAME"));
-       ctx->env.server_port = xstrdupn(getenv("SERVER_PORT"));
-       ctx->page.mimetype = "text/html";
-       ctx->page.charset = PAGE_ENCODING;
-       ctx->page.filename = NULL;
-       ctx->page.size = 0;
-       ctx->page.modified = time(NULL);
-       ctx->page.expires = ctx->page.modified;
-       ctx->page.etag = NULL;
-       memset(&ctx->cfg.mimetypes, 0, sizeof(struct string_list));
-       if (ctx->env.script_name)
-               ctx->cfg.script_name = ctx->env.script_name;
-       if (ctx->env.query_string)
-               ctx->qry.raw = ctx->env.query_string;
-       if (!ctx->env.cgit_config)
-               ctx->env.cgit_config = CGIT_CONFIG;
+       memset(&ctx, 0, sizeof(ctx));
+       ctx.cfg.agefile = "info/web/last-modified";
+       ctx.cfg.cache_size = 0;
+       ctx.cfg.cache_max_create_time = 5;
+       ctx.cfg.cache_root = CGIT_CACHE_ROOT;
+       ctx.cfg.cache_about_ttl = 15;
+       ctx.cfg.cache_snapshot_ttl = 5;
+       ctx.cfg.cache_repo_ttl = 5;
+       ctx.cfg.cache_root_ttl = 5;
+       ctx.cfg.cache_scanrc_ttl = 15;
+       ctx.cfg.cache_dynamic_ttl = 5;
+       ctx.cfg.cache_static_ttl = -1;
+       ctx.cfg.case_sensitive_sort = 1;
+       ctx.cfg.branch_sort = 0;
+       ctx.cfg.commit_sort = 0;
+       ctx.cfg.css = "/cgit.css";
+       ctx.cfg.logo = "/cgit.png";
+       ctx.cfg.favicon = "/favicon.ico";
+       ctx.cfg.local_time = 0;
+       ctx.cfg.enable_http_clone = 1;
+       ctx.cfg.enable_index_owner = 1;
+       ctx.cfg.enable_tree_linenumbers = 1;
+       ctx.cfg.enable_git_config = 0;
+       ctx.cfg.max_repo_count = 50;
+       ctx.cfg.max_commit_count = 50;
+       ctx.cfg.max_lock_attempts = 5;
+       ctx.cfg.max_msg_len = 80;
+       ctx.cfg.max_repodesc_len = 80;
+       ctx.cfg.max_blob_size = 0;
+       ctx.cfg.max_stats = 0;
+       ctx.cfg.project_list = NULL;
+       ctx.cfg.renamelimit = -1;
+       ctx.cfg.remove_suffix = 0;
+       ctx.cfg.robots = "index, nofollow";
+       ctx.cfg.root_title = "Git repository browser";
+       ctx.cfg.root_desc = "a fast webinterface for the git dscm";
+       ctx.cfg.scan_hidden_path = 0;
+       ctx.cfg.script_name = CGIT_SCRIPT_NAME;
+       ctx.cfg.section = "";
+       ctx.cfg.repository_sort = "name";
+       ctx.cfg.section_sort = 1;
+       ctx.cfg.summary_branches = 10;
+       ctx.cfg.summary_log = 10;
+       ctx.cfg.summary_tags = 10;
+       ctx.cfg.max_atom_items = 10;
+       ctx.cfg.difftype = DIFF_UNIFIED;
+       ctx.env.cgit_config = getenv("CGIT_CONFIG");
+       ctx.env.http_host = getenv("HTTP_HOST");
+       ctx.env.https = getenv("HTTPS");
+       ctx.env.no_http = getenv("NO_HTTP");
+       ctx.env.path_info = getenv("PATH_INFO");
+       ctx.env.query_string = getenv("QUERY_STRING");
+       ctx.env.request_method = getenv("REQUEST_METHOD");
+       ctx.env.script_name = getenv("SCRIPT_NAME");
+       ctx.env.server_name = getenv("SERVER_NAME");
+       ctx.env.server_port = getenv("SERVER_PORT");
+       ctx.env.http_cookie = getenv("HTTP_COOKIE");
+       ctx.env.http_referer = getenv("HTTP_REFERER");
+       ctx.env.content_length = getenv("CONTENT_LENGTH") ? strtoul(getenv("CONTENT_LENGTH"), NULL, 10) : 0;
+       ctx.env.authenticated = 0;
+       ctx.page.mimetype = "text/html";
+       ctx.page.charset = PAGE_ENCODING;
+       ctx.page.filename = NULL;
+       ctx.page.size = 0;
+       ctx.page.modified = time(NULL);
+       ctx.page.expires = ctx.page.modified;
+       ctx.page.etag = NULL;
+       string_list_init(&ctx.cfg.mimetypes, 1);
+       if (ctx.env.script_name)
+               ctx.cfg.script_name = xstrdup(ctx.env.script_name);
+       if (ctx.env.query_string)
+               ctx.qry.raw = xstrdup(ctx.env.query_string);
+       if (!ctx.env.cgit_config)
+               ctx.env.cgit_config = CGIT_CONFIG;
 }
 
 struct refmatch {
 }
 
 struct refmatch {
@@ -414,8 +443,8 @@ struct refmatch {
        int match;
 };
 
        int match;
 };
 
-int find_current_ref(const char *refname, const unsigned char *sha1,
-                    int flags, void *cb_data)
+static int find_current_ref(const char *refname, const struct object_id *oid,
+                           int flags, void *cb_data)
 {
        struct refmatch *info;
 
 {
        struct refmatch *info;
 
@@ -427,7 +456,13 @@ int find_current_ref(const char *refname, const unsigned char *sha1,
        return info->match;
 }
 
        return info->match;
 }
 
-char *find_default_branch(struct cgit_repo *repo)
+static void free_refmatch_inner(struct refmatch *info)
+{
+       if (info->first_ref)
+               free(info->first_ref);
+}
+
+static char *find_default_branch(struct cgit_repo *repo)
 {
        struct refmatch info;
        char *ref;
 {
        struct refmatch info;
        char *ref;
@@ -442,160 +477,306 @@ char *find_default_branch(struct cgit_repo *repo)
                ref = info.first_ref;
        if (ref)
                ref = xstrdup(ref);
                ref = info.first_ref;
        if (ref)
                ref = xstrdup(ref);
+       free_refmatch_inner(&info);
+
        return ref;
 }
 
 static char *guess_defbranch(void)
 {
        return ref;
 }
 
 static char *guess_defbranch(void)
 {
-       const char *ref;
-       unsigned char sha1[20];
+       const char *ref, *refname;
+       struct object_id oid;
 
 
-       ref = resolve_ref_unsafe("HEAD", sha1, 0, NULL);
-       if (!ref || prefixcmp(ref, "refs/heads/"))
+       ref = resolve_ref_unsafe("HEAD", 0, &oid, NULL);
+       if (!ref || !skip_prefix(ref, "refs/heads/", &refname))
                return "master";
                return "master";
-       return xstrdup(ref + 11);
+       return xstrdup(refname);
 }
 
 }
 
-static int prepare_repo_cmd(struct cgit_context *ctx)
+/* The caller must free filename and ref after calling this. */
+static inline void parse_readme(const char *readme, char **filename, char **ref, struct cgit_repo *repo)
 {
 {
-       char *tmp;
-       unsigned char sha1[20];
-       int nongit = 0;
+       const char *colon;
+
+       *filename = NULL;
+       *ref = NULL;
+
+       if (!readme || !readme[0])
+               return;
+
+       /* Check if the readme is tracked in the git repo. */
+       colon = strchr(readme, ':');
+       if (colon && strlen(colon) > 1) {
+               /* If it starts with a colon, we want to use
+                * the default branch */
+               if (colon == readme && repo->defbranch)
+                       *ref = xstrdup(repo->defbranch);
+               else
+                       *ref = xstrndup(readme, colon - readme);
+               readme = colon + 1;
+       }
+
+       /* Prepend repo path to relative readme path unless tracked. */
+       if (!(*ref) && readme[0] != '/')
+               *filename = fmtalloc("%s/%s", repo->path, readme);
+       else
+               *filename = xstrdup(readme);
+}
+static void choose_readme(struct cgit_repo *repo)
+{
+       int found;
+       char *filename, *ref;
+       struct string_list_item *entry;
+
+       if (!repo->readme.nr)
+               return;
+
+       found = 0;
+       for_each_string_list_item(entry, &repo->readme) {
+               parse_readme(entry->string, &filename, &ref, repo);
+               if (!filename) {
+                       free(filename);
+                       free(ref);
+                       continue;
+               }
+               if (ref) {
+                       if (cgit_ref_path_exists(filename, ref, 1)) {
+                               found = 1;
+                               break;
+                       }
+               }
+               else if (!access(filename, R_OK)) {
+                       found = 1;
+                       break;
+               }
+               free(filename);
+               free(ref);
+       }
+       repo->readme.strdup_strings = 1;
+       string_list_clear(&repo->readme, 0);
+       repo->readme.strdup_strings = 0;
+       if (found)
+               string_list_append(&repo->readme, filename)->util = ref;
+}
+
+static void print_no_repo_clone_urls(const char *url)
+{
+        html("<tr><td><a rel='vcs-git' href='");
+        html_url_path(url);
+        html("' title='");
+        html_attr(ctx.repo->name);
+        html(" Git repository'>");
+        html_txt(url);
+        html("</a></td></tr>\n");
+}
+
+static void prepare_repo_env(int *nongit)
+{
+       /* The path to the git repository. */
+       setenv("GIT_DIR", ctx.repo->path, 1);
+
+       /* Setup the git directory and initialize the notes system. Both of these
+        * load local configuration from the git repository, so we do them both while
+        * the HOME variables are unset. */
+       setup_git_directory_gently(nongit);
+       load_display_notes(NULL);
+}
+
+static int prepare_repo_cmd(int nongit)
+{
+       struct object_id oid;
        int rc;
 
        int rc;
 
-       setenv("GIT_DIR", ctx->repo->path, 1);
-       setup_git_directory_gently(&nongit);
        if (nongit) {
        if (nongit) {
+               const char *name = ctx.repo->name;
                rc = errno;
                rc = errno;
-               ctx->page.title = fmt("%s - %s", ctx->cfg.root_title,
-                                     "config error");
-               tmp = fmt("Failed to open %s: %s",
-                         ctx->repo->name,
-                         rc ? strerror(rc) : "Not a valid git repository");
-               ctx->repo = NULL;
-               cgit_print_http_headers(ctx);
-               cgit_print_docstart(ctx);
-               cgit_print_pageheader(ctx);
-               cgit_print_error(tmp);
+               ctx.page.title = fmtalloc("%s - %s", ctx.cfg.root_title,
+                                               "config error");
+               ctx.repo = NULL;
+               cgit_print_http_headers();
+               cgit_print_docstart();
+               cgit_print_pageheader();
+               cgit_print_error("Failed to open %s: %s", name,
+                                rc ? strerror(rc) : "Not a valid git repository");
                cgit_print_docend();
                return 1;
        }
                cgit_print_docend();
                return 1;
        }
-       ctx->page.title = fmt("%s - %s", ctx->repo->name, ctx->repo->desc);
+       ctx.page.title = fmtalloc("%s - %s", ctx.repo->name, ctx.repo->desc);
 
 
-       if (!ctx->repo->defbranch)
-               ctx->repo->defbranch = guess_defbranch();
+       if (!ctx.repo->defbranch)
+               ctx.repo->defbranch = guess_defbranch();
 
 
-       if (!ctx->qry.head) {
-               ctx->qry.nohead = 1;
-               ctx->qry.head = find_default_branch(ctx->repo);
+       if (!ctx.qry.head) {
+               ctx.qry.nohead = 1;
+               ctx.qry.head = find_default_branch(ctx.repo);
        }
 
        }
 
-       if (!ctx->qry.head) {
-               cgit_print_http_headers(ctx);
-               cgit_print_docstart(ctx);
-               cgit_print_pageheader(ctx);
+       if (!ctx.qry.head) {
+               cgit_print_http_headers();
+               cgit_print_docstart();
+               cgit_print_pageheader();
                cgit_print_error("Repository seems to be empty");
                cgit_print_error("Repository seems to be empty");
+               if (!strcmp(ctx.qry.page, "summary")) {
+                       html("<table class='list'><tr class='nohover'><td>&nbsp;</td></tr><tr class='nohover'><th class='left'>Clone</th></tr>\n");
+                       cgit_prepare_repo_env(ctx.repo);
+                       cgit_add_clone_urls(print_no_repo_clone_urls);
+                       html("</table>\n");
+               }
                cgit_print_docend();
                return 1;
        }
 
                cgit_print_docend();
                return 1;
        }
 
-       if (get_sha1(ctx->qry.head, sha1)) {
-               tmp = xstrdup(ctx->qry.head);
-               ctx->qry.head = ctx->repo->defbranch;
-               ctx->page.status = 404;
-               ctx->page.statusmsg = "Not found";
-               cgit_print_http_headers(ctx);
-               cgit_print_docstart(ctx);
-               cgit_print_pageheader(ctx);
-               cgit_print_error(fmt("Invalid branch: %s", tmp));
-               cgit_print_docend();
+       if (get_oid(ctx.qry.head, &oid)) {
+               char *old_head = ctx.qry.head;
+               ctx.qry.head = xstrdup(ctx.repo->defbranch);
+               cgit_print_error_page(404, "Not found",
+                               "Invalid branch: %s", old_head);
+               free(old_head);
                return 1;
        }
                return 1;
        }
-       sort_string_list(&ctx->repo->submodules);
-       cgit_prepare_repo_env(ctx->repo);
+       string_list_sort(&ctx.repo->submodules);
+       cgit_prepare_repo_env(ctx.repo);
+       choose_readme(ctx.repo);
        return 0;
 }
 
        return 0;
 }
 
-static void process_request(void *cbdata)
+static inline void open_auth_filter(const char *function)
 {
 {
-       struct cgit_context *ctx = cbdata;
-       struct cgit_cmd *cmd;
+       cgit_open_filter(ctx.cfg.auth_filter, function,
+               ctx.env.http_cookie ? ctx.env.http_cookie : "",
+               ctx.env.request_method ? ctx.env.request_method : "",
+               ctx.env.query_string ? ctx.env.query_string : "",
+               ctx.env.http_referer ? ctx.env.http_referer : "",
+               ctx.env.path_info ? ctx.env.path_info : "",
+               ctx.env.http_host ? ctx.env.http_host : "",
+               ctx.env.https ? ctx.env.https : "",
+               ctx.qry.repo ? ctx.qry.repo : "",
+               ctx.qry.page ? ctx.qry.page : "",
+               cgit_currentfullurl(),
+               cgit_loginurl());
+}
 
 
-       cmd = cgit_get_cmd(ctx);
-       if (!cmd) {
-               ctx->page.title = "cgit error";
-               ctx->page.status = 404;
-               ctx->page.statusmsg = "Not found";
-               cgit_print_http_headers(ctx);
-               cgit_print_docstart(ctx);
-               cgit_print_pageheader(ctx);
-               cgit_print_error("Invalid request");
-               cgit_print_docend();
+/* We intentionally keep this rather small, instead of looping and
+ * feeding it to the filter a couple bytes at a time. This way, the
+ * filter itself does not need to handle any denial of service or
+ * buffer bloat issues. If this winds up being too small, people
+ * will complain on the mailing list, and we'll increase it as needed. */
+#define MAX_AUTHENTICATION_POST_BYTES 4096
+/* The filter is expected to spit out "Status: " and all headers. */
+static inline void authenticate_post(void)
+{
+       char buffer[MAX_AUTHENTICATION_POST_BYTES];
+       ssize_t len;
+
+       open_auth_filter("authenticate-post");
+       len = ctx.env.content_length;
+       if (len > MAX_AUTHENTICATION_POST_BYTES)
+               len = MAX_AUTHENTICATION_POST_BYTES;
+       if ((len = read(STDIN_FILENO, buffer, len)) < 0)
+               die_errno("Could not read POST from stdin");
+       if (write(STDOUT_FILENO, buffer, len) < 0)
+               die_errno("Could not write POST to stdout");
+       cgit_close_filter(ctx.cfg.auth_filter);
+       exit(0);
+}
+
+static inline void authenticate_cookie(void)
+{
+       /* If we don't have an auth_filter, consider all cookies valid, and thus return early. */
+       if (!ctx.cfg.auth_filter) {
+               ctx.env.authenticated = 1;
                return;
        }
 
                return;
        }
 
-       if (!ctx->cfg.enable_http_clone && cmd->is_clone) {
-               html_status(404, "Not found", 0);
+       /* If we're having something POST'd to /login, we're authenticating POST,
+        * instead of the cookie, so call authenticate_post and bail out early.
+        * This pattern here should match /?p=login with POST. */
+       if (ctx.env.request_method && ctx.qry.page && !ctx.repo && \
+           !strcmp(ctx.env.request_method, "POST") && !strcmp(ctx.qry.page, "login")) {
+               authenticate_post();
                return;
        }
 
                return;
        }
 
-       /* If cmd->want_vpath is set, assume ctx->qry.path contains a "virtual"
-        * in-project path limit to be made available at ctx->qry.vpath.
-        * Otherwise, no path limit is in effect (ctx->qry.vpath = NULL).
-        */
-       ctx->qry.vpath = cmd->want_vpath ? ctx->qry.path : NULL;
+       /* If we've made it this far, we're authenticating the cookie for real, so do that. */
+       open_auth_filter("authenticate-cookie");
+       ctx.env.authenticated = cgit_close_filter(ctx.cfg.auth_filter);
+}
+
+static void process_request(void)
+{
+       struct cgit_cmd *cmd;
+       int nongit = 0;
 
 
-       if (cmd->want_repo && !ctx->repo) {
-               cgit_print_http_headers(ctx);
-               cgit_print_docstart(ctx);
-               cgit_print_pageheader(ctx);
-               cgit_print_error(fmt("No repository selected"));
+       /* If we're not yet authenticated, no matter what page we're on,
+        * display the authentication body from the auth_filter. This should
+        * never be cached. */
+       if (!ctx.env.authenticated) {
+               ctx.page.title = "Authentication Required";
+               cgit_print_http_headers();
+               cgit_print_docstart();
+               cgit_print_pageheader();
+               open_auth_filter("body");
+               cgit_close_filter(ctx.cfg.auth_filter);
                cgit_print_docend();
                return;
        }
 
                cgit_print_docend();
                return;
        }
 
-       if (ctx->repo && prepare_repo_cmd(ctx))
+       if (ctx.repo)
+               prepare_repo_env(&nongit);
+
+       cmd = cgit_get_cmd();
+       if (!cmd) {
+               ctx.page.title = "cgit error";
+               cgit_print_error_page(404, "Not found", "Invalid request");
                return;
                return;
+       }
 
 
-       if (cmd->want_layout) {
-               cgit_print_http_headers(ctx);
-               cgit_print_docstart(ctx);
-               cgit_print_pageheader(ctx);
+       if (!ctx.cfg.enable_http_clone && cmd->is_clone) {
+               ctx.page.title = "cgit error";
+               cgit_print_error_page(404, "Not found", "Invalid request");
+               return;
        }
 
        }
 
-       cmd->fn(ctx);
+       if (cmd->want_repo && !ctx.repo) {
+               cgit_print_error_page(400, "Bad request",
+                               "No repository selected");
+               return;
+       }
 
 
-       if (cmd->want_layout)
-               cgit_print_docend();
+       /* If cmd->want_vpath is set, assume ctx.qry.path contains a "virtual"
+        * in-project path limit to be made available at ctx.qry.vpath.
+        * Otherwise, no path limit is in effect (ctx.qry.vpath = NULL).
+        */
+       ctx.qry.vpath = cmd->want_vpath ? ctx.qry.path : NULL;
+
+       if (ctx.repo && prepare_repo_cmd(nongit))
+               return;
+
+       cmd->fn();
 }
 
 }
 
-int cmp_repos(const void *a, const void *b)
+static int cmp_repos(const void *a, const void *b)
 {
        const struct cgit_repo *ra = a, *rb = b;
        return strcmp(ra->url, rb->url);
 }
 
 {
        const struct cgit_repo *ra = a, *rb = b;
        return strcmp(ra->url, rb->url);
 }
 
-char *build_snapshot_setting(int bitmap)
+static char *build_snapshot_setting(int bitmap)
 {
        const struct cgit_snapshot_format *f;
 {
        const struct cgit_snapshot_format *f;
-       char *result = xstrdup("");
-       char *tmp;
-       int len;
+       struct strbuf result = STRBUF_INIT;
 
        for (f = cgit_snapshot_formats; f->suffix; f++) {
 
        for (f = cgit_snapshot_formats; f->suffix; f++) {
-               if (f->bit & bitmap) {
-                       tmp = result;
-                       result = xstrdup(fmt("%s%s ", tmp, f->suffix));
-                       free(tmp);
+               if (cgit_snapshot_format_bit(f) & bitmap) {
+                       if (result.len)
+                               strbuf_addch(&result, ' ');
+                       strbuf_addstr(&result, f->suffix);
                }
        }
                }
        }
-       len = strlen(result);
-       if (len)
-               result[len - 1] = '\0';
-       return result;
+       return strbuf_detach(&result, NULL);
 }
 
 }
 
-char *get_first_line(char *txt)
+static char *get_first_line(char *txt)
 {
        char *t = xstrdup(txt);
        char *p = strchr(t, '\n');
 {
        char *t = xstrdup(txt);
        char *p = strchr(t, '\n');
@@ -604,8 +785,9 @@ char *get_first_line(char *txt)
        return t;
 }
 
        return t;
 }
 
-void print_repo(FILE *f, struct cgit_repo *repo)
+static void print_repo(FILE *f, struct cgit_repo *repo)
 {
 {
+       struct string_list_item *item;
        fprintf(f, "repo.url=%s\n", repo->url);
        fprintf(f, "repo.name=%s\n", repo->name);
        fprintf(f, "repo.path=%s\n", repo->path);
        fprintf(f, "repo.url=%s\n", repo->url);
        fprintf(f, "repo.name=%s\n", repo->name);
        fprintf(f, "repo.path=%s\n", repo->path);
@@ -616,16 +798,26 @@ void print_repo(FILE *f, struct cgit_repo *repo)
                fprintf(f, "repo.desc=%s\n", tmp);
                free(tmp);
        }
                fprintf(f, "repo.desc=%s\n", tmp);
                free(tmp);
        }
-       if (repo->readme)
-               fprintf(f, "repo.readme=%s\n", repo->readme);
+       for_each_string_list_item(item, &repo->readme) {
+               if (item->util)
+                       fprintf(f, "repo.readme=%s:%s\n", (char *)item->util, item->string);
+               else
+                       fprintf(f, "repo.readme=%s\n", item->string);
+       }
        if (repo->defbranch)
                fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
        if (repo->defbranch)
                fprintf(f, "repo.defbranch=%s\n", repo->defbranch);
+       if (repo->extra_head_content)
+               fprintf(f, "repo.extra-head-content=%s\n", repo->extra_head_content);
        if (repo->module_link)
                fprintf(f, "repo.module-link=%s\n", repo->module_link);
        if (repo->section)
                fprintf(f, "repo.section=%s\n", repo->section);
        if (repo->module_link)
                fprintf(f, "repo.module-link=%s\n", repo->module_link);
        if (repo->section)
                fprintf(f, "repo.section=%s\n", repo->section);
+       if (repo->homepage)
+               fprintf(f, "repo.homepage=%s\n", repo->homepage);
        if (repo->clone_url)
                fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
        if (repo->clone_url)
                fprintf(f, "repo.clone-url=%s\n", repo->clone_url);
+       fprintf(f, "repo.enable-blame=%d\n",
+               repo->enable_blame);
        fprintf(f, "repo.enable-commit-graph=%d\n",
                repo->enable_commit_graph);
        fprintf(f, "repo.enable-log-filecount=%d\n",
        fprintf(f, "repo.enable-commit-graph=%d\n",
                repo->enable_commit_graph);
        fprintf(f, "repo.enable-log-filecount=%d\n",
@@ -633,23 +825,46 @@ void print_repo(FILE *f, struct cgit_repo *repo)
        fprintf(f, "repo.enable-log-linecount=%d\n",
                repo->enable_log_linecount);
        if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
        fprintf(f, "repo.enable-log-linecount=%d\n",
                repo->enable_log_linecount);
        if (repo->about_filter && repo->about_filter != ctx.cfg.about_filter)
-               fprintf(f, "repo.about-filter=%s\n", repo->about_filter->cmd);
+               cgit_fprintf_filter(repo->about_filter, f, "repo.about-filter=");
        if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
        if (repo->commit_filter && repo->commit_filter != ctx.cfg.commit_filter)
-               fprintf(f, "repo.commit-filter=%s\n", repo->commit_filter->cmd);
+               cgit_fprintf_filter(repo->commit_filter, f, "repo.commit-filter=");
        if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
        if (repo->source_filter && repo->source_filter != ctx.cfg.source_filter)
-               fprintf(f, "repo.source-filter=%s\n", repo->source_filter->cmd);
+               cgit_fprintf_filter(repo->source_filter, f, "repo.source-filter=");
+       if (repo->email_filter && repo->email_filter != ctx.cfg.email_filter)
+               cgit_fprintf_filter(repo->email_filter, f, "repo.email-filter=");
+       if (repo->owner_filter && repo->owner_filter != ctx.cfg.owner_filter)
+               cgit_fprintf_filter(repo->owner_filter, f, "repo.owner-filter=");
        if (repo->snapshots != ctx.cfg.snapshots) {
                char *tmp = build_snapshot_setting(repo->snapshots);
        if (repo->snapshots != ctx.cfg.snapshots) {
                char *tmp = build_snapshot_setting(repo->snapshots);
-               fprintf(f, "repo.snapshots=%s\n", tmp);
+               fprintf(f, "repo.snapshots=%s\n", tmp ? tmp : "");
                free(tmp);
        }
                free(tmp);
        }
+       if (repo->snapshot_prefix)
+               fprintf(f, "repo.snapshot-prefix=%s\n", repo->snapshot_prefix);
        if (repo->max_stats != ctx.cfg.max_stats)
                fprintf(f, "repo.max-stats=%s\n",
                        cgit_find_stats_periodname(repo->max_stats));
        if (repo->max_stats != ctx.cfg.max_stats)
                fprintf(f, "repo.max-stats=%s\n",
                        cgit_find_stats_periodname(repo->max_stats));
+       if (repo->logo)
+               fprintf(f, "repo.logo=%s\n", repo->logo);
+       if (repo->logo_link)
+               fprintf(f, "repo.logo-link=%s\n", repo->logo_link);
+       fprintf(f, "repo.enable-remote-branches=%d\n", repo->enable_remote_branches);
+       fprintf(f, "repo.enable-subject-links=%d\n", repo->enable_subject_links);
+       fprintf(f, "repo.enable-html-serving=%d\n", repo->enable_html_serving);
+       if (repo->branch_sort == 1)
+               fprintf(f, "repo.branch-sort=age\n");
+       if (repo->commit_sort) {
+               if (repo->commit_sort == 1)
+                       fprintf(f, "repo.commit-sort=date\n");
+               else if (repo->commit_sort == 2)
+                       fprintf(f, "repo.commit-sort=topo\n");
+       }
+       fprintf(f, "repo.hide=%d\n", repo->hide);
+       fprintf(f, "repo.ignore=%d\n", repo->ignore);
        fprintf(f, "\n");
 }
 
        fprintf(f, "\n");
 }
 
-void print_repolist(FILE *f, struct cgit_repolist *list, int start)
+static void print_repolist(FILE *f, struct cgit_repolist *list, int start)
 {
        int i;
 
 {
        int i;
 
@@ -662,20 +877,22 @@ void print_repolist(FILE *f, struct cgit_repolist *list, int start)
  */
 static int generate_cached_repolist(const char *path, const char *cached_rc)
 {
  */
 static int generate_cached_repolist(const char *path, const char *cached_rc)
 {
-       char *locked_rc;
+       struct strbuf locked_rc = STRBUF_INIT;
+       int result = 0;
        int idx;
        FILE *f;
 
        int idx;
        FILE *f;
 
-       locked_rc = xstrdup(fmt("%s.lock", cached_rc));
-       f = fopen(locked_rc, "wx");
+       strbuf_addf(&locked_rc, "%s.lock", cached_rc);
+       f = fopen(locked_rc.buf, "wx");
        if (!f) {
                /* Inform about the error unless the lockfile already existed,
                 * since that only means we've got concurrent requests.
                 */
        if (!f) {
                /* Inform about the error unless the lockfile already existed,
                 * since that only means we've got concurrent requests.
                 */
-               if (errno != EEXIST)
+               result = errno;
+               if (result != EEXIST)
                        fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
                        fprintf(stderr, "[cgit] Error opening %s: %s (%d)\n",
-                               locked_rc, strerror(errno), errno);
-               return errno;
+                               locked_rc.buf, strerror(result), result);
+               goto out;
        }
        idx = cgit_repolist.count;
        if (ctx.cfg.project_list)
        }
        idx = cgit_repolist.count;
        if (ctx.cfg.project_list)
@@ -683,106 +900,119 @@ static int generate_cached_repolist(const char *path, const char *cached_rc)
        else
                scan_tree(path, repo_config);
        print_repolist(f, &cgit_repolist, idx);
        else
                scan_tree(path, repo_config);
        print_repolist(f, &cgit_repolist, idx);
-       if (rename(locked_rc, cached_rc))
+       if (rename(locked_rc.buf, cached_rc))
                fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
                fprintf(stderr, "[cgit] Error renaming %s to %s: %s (%d)\n",
-                       locked_rc, cached_rc, strerror(errno), errno);
+                       locked_rc.buf, cached_rc, strerror(errno), errno);
        fclose(f);
        fclose(f);
-       return 0;
+out:
+       strbuf_release(&locked_rc);
+       return result;
 }
 
 static void process_cached_repolist(const char *path)
 {
        struct stat st;
 }
 
 static void process_cached_repolist(const char *path)
 {
        struct stat st;
-       char *cached_rc;
+       struct strbuf cached_rc = STRBUF_INIT;
        time_t age;
        unsigned long hash;
 
        hash = hash_str(path);
        if (ctx.cfg.project_list)
                hash += hash_str(ctx.cfg.project_list);
        time_t age;
        unsigned long hash;
 
        hash = hash_str(path);
        if (ctx.cfg.project_list)
                hash += hash_str(ctx.cfg.project_list);
-       cached_rc = xstrdup(fmt("%s/rc-%8lx", ctx.cfg.cache_root, hash));
+       strbuf_addf(&cached_rc, "%s/rc-%8lx", ctx.cfg.cache_root, hash);
 
 
-       if (stat(cached_rc, &st)) {
+       if (stat(cached_rc.buf, &st)) {
                /* Nothing is cached, we need to scan without forking. And
                 * if we fail to generate a cached repolist, we need to
                 * invoke scan_tree manually.
                 */
                /* Nothing is cached, we need to scan without forking. And
                 * if we fail to generate a cached repolist, we need to
                 * invoke scan_tree manually.
                 */
-               if (generate_cached_repolist(path, cached_rc)) {
+               if (generate_cached_repolist(path, cached_rc.buf)) {
                        if (ctx.cfg.project_list)
                                scan_projects(path, ctx.cfg.project_list,
                                              repo_config);
                        else
                                scan_tree(path, repo_config);
                }
                        if (ctx.cfg.project_list)
                                scan_projects(path, ctx.cfg.project_list,
                                              repo_config);
                        else
                                scan_tree(path, repo_config);
                }
-               return;
+               goto out;
        }
 
        }
 
-       parse_configfile(cached_rc, config_cb);
+       parse_configfile(cached_rc.buf, config_cb);
 
        /* If the cached configfile hasn't expired, lets exit now */
        age = time(NULL) - st.st_mtime;
        if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
 
        /* If the cached configfile hasn't expired, lets exit now */
        age = time(NULL) - st.st_mtime;
        if (age <= (ctx.cfg.cache_scanrc_ttl * 60))
-               return;
+               goto out;
 
        /* The cached repolist has been parsed, but it was old. So lets
         * rescan the specified path and generate a new cached repolist
         * in a child-process to avoid latency for the current request.
         */
        if (fork())
 
        /* The cached repolist has been parsed, but it was old. So lets
         * rescan the specified path and generate a new cached repolist
         * in a child-process to avoid latency for the current request.
         */
        if (fork())
-               return;
+               goto out;
 
 
-       exit(generate_cached_repolist(path, cached_rc));
+       exit(generate_cached_repolist(path, cached_rc.buf));
+out:
+       strbuf_release(&cached_rc);
 }
 
 static void cgit_parse_args(int argc, const char **argv)
 {
        int i;
 }
 
 static void cgit_parse_args(int argc, const char **argv)
 {
        int i;
+       const char *arg;
        int scan = 0;
 
        for (i = 1; i < argc; i++) {
        int scan = 0;
 
        for (i = 1; i < argc; i++) {
-               if (!strncmp(argv[i], "--cache=", 8)) {
-                       ctx.cfg.cache_root = xstrdup(argv[i] + 8);
-               }
-               if (!strcmp(argv[i], "--nocache")) {
-                       ctx.cfg.nocache = 1;
+               if (!strcmp(argv[i], "--version")) {
+                       printf("CGit %s | https://git.zx2c4.com/cgit/\n\nCompiled in features:\n", CGIT_VERSION);
+#ifdef NO_LUA
+                       printf("[-] ");
+#else
+                       printf("[+] ");
+#endif
+                       printf("Lua scripting\n");
+#ifndef HAVE_LINUX_SENDFILE
+                       printf("[-] ");
+#else
+                       printf("[+] ");
+#endif
+                       printf("Linux sendfile() usage\n");
+
+                       exit(0);
                }
                }
-               if (!strcmp(argv[i], "--nohttp")) {
+               if (skip_prefix(argv[i], "--cache=", &arg)) {
+                       ctx.cfg.cache_root = xstrdup(arg);
+               } else if (!strcmp(argv[i], "--nohttp")) {
                        ctx.env.no_http = "1";
                        ctx.env.no_http = "1";
-               }
-               if (!strncmp(argv[i], "--query=", 8)) {
-                       ctx.qry.raw = xstrdup(argv[i] + 8);
-               }
-               if (!strncmp(argv[i], "--repo=", 7)) {
-                       ctx.qry.repo = xstrdup(argv[i] + 7);
-               }
-               if (!strncmp(argv[i], "--page=", 7)) {
-                       ctx.qry.page = xstrdup(argv[i] + 7);
-               }
-               if (!strncmp(argv[i], "--head=", 7)) {
-                       ctx.qry.head = xstrdup(argv[i] + 7);
+               } else if (skip_prefix(argv[i], "--query=", &arg)) {
+                       ctx.qry.raw = xstrdup(arg);
+               } else if (skip_prefix(argv[i], "--repo=", &arg)) {
+                       ctx.qry.repo = xstrdup(arg);
+               } else if (skip_prefix(argv[i], "--page=", &arg)) {
+                       ctx.qry.page = xstrdup(arg);
+               } else if (skip_prefix(argv[i], "--head=", &arg)) {
+                       ctx.qry.head = xstrdup(arg);
                        ctx.qry.has_symref = 1;
                        ctx.qry.has_symref = 1;
-               }
-               if (!strncmp(argv[i], "--sha1=", 7)) {
-                       ctx.qry.sha1 = xstrdup(argv[i] + 7);
-                       ctx.qry.has_sha1 = 1;
-               }
-               if (!strncmp(argv[i], "--ofs=", 6)) {
-                       ctx.qry.ofs = atoi(argv[i] + 6);
-               }
-               if (!strncmp(argv[i], "--scan-tree=", 12) ||
-                   !strncmp(argv[i], "--scan-path=", 12)) {
-                       /* HACK: the global snapshot bitmask defines the
-                        * set of allowed snapshot formats, but the config
-                        * file hasn't been parsed yet so the mask is
-                        * currently 0. By setting all bits high before
-                        * scanning we make sure that any in-repo cgitrc
-                        * snapshot setting is respected by scan_tree().
-                        * BTW: we assume that there'll never be more than
-                        * 255 different snapshot formats supported by cgit...
+               } else if (skip_prefix(argv[i], "--oid=", &arg)) {
+                       ctx.qry.oid = xstrdup(arg);
+                       ctx.qry.has_oid = 1;
+               } else if (skip_prefix(argv[i], "--ofs=", &arg)) {
+                       ctx.qry.ofs = atoi(arg);
+               } else if (skip_prefix(argv[i], "--scan-tree=", &arg) ||
+                          skip_prefix(argv[i], "--scan-path=", &arg)) {
+                       /*
+                        * HACK: The global snapshot bit mask defines the set
+                        * of allowed snapshot formats, but the config file
+                        * hasn't been parsed yet so the mask is currently 0.
+                        * By setting all bits high before scanning we make
+                        * sure that any in-repo cgitrc snapshot setting is
+                        * respected by scan_tree().
+                        *
+                        * NOTE: We assume that there aren't more than 8
+                        * different snapshot formats supported by cgit...
                         */
                        ctx.cfg.snapshots = 0xFF;
                        scan++;
                         */
                        ctx.cfg.snapshots = 0xFF;
                        scan++;
-                       scan_tree(argv[i] + 12, repo_config);
+                       scan_tree(arg, repo_config);
                }
        }
        if (scan) {
                }
        }
        if (scan) {
@@ -793,7 +1023,7 @@ static void cgit_parse_args(int argc, const char **argv)
        }
 }
 
        }
 }
 
-static int calc_ttl()
+static int calc_ttl(void)
 {
        if (!ctx.repo)
                return ctx.cfg.cache_root_ttl;
 {
        if (!ctx.repo)
                return ctx.cfg.cache_root_ttl;
@@ -801,22 +1031,30 @@ static int calc_ttl()
        if (!ctx.qry.page)
                return ctx.cfg.cache_repo_ttl;
 
        if (!ctx.qry.page)
                return ctx.cfg.cache_repo_ttl;
 
-       if (ctx.qry.has_symref)
-               return ctx.cfg.cache_dynamic_ttl;
+       if (!strcmp(ctx.qry.page, "about"))
+               return ctx.cfg.cache_about_ttl;
+
+       if (!strcmp(ctx.qry.page, "snapshot"))
+               return ctx.cfg.cache_snapshot_ttl;
 
 
-       if (ctx.qry.has_sha1)
+       if (ctx.qry.has_oid)
                return ctx.cfg.cache_static_ttl;
 
                return ctx.cfg.cache_static_ttl;
 
+       if (ctx.qry.has_symref)
+               return ctx.cfg.cache_dynamic_ttl;
+
        return ctx.cfg.cache_repo_ttl;
 }
 
        return ctx.cfg.cache_repo_ttl;
 }
 
-int main(int argc, const char **argv)
+int cmd_main(int argc, const char **argv)
 {
        const char *path;
 {
        const char *path;
-       char *qry;
        int err, ttl;
 
        int err, ttl;
 
-       prepare_context(&ctx);
+       cgit_init_filters();
+       atexit(cgit_cleanup_filters);
+
+       prepare_context();
        cgit_repolist.length = 0;
        cgit_repolist.count = 0;
        cgit_repolist.repos = NULL;
        cgit_repolist.length = 0;
        cgit_repolist.count = 0;
        cgit_repolist.repos = NULL;
@@ -830,11 +1068,8 @@ int main(int argc, const char **argv)
         * that virtual-root equals SCRIPT_NAME, minus any possibly
         * trailing slashes.
         */
         * that virtual-root equals SCRIPT_NAME, minus any possibly
         * trailing slashes.
         */
-       if (!ctx.cfg.virtual_root && ctx.cfg.script_name) {
-               ctx.cfg.virtual_root = trim_end(ctx.cfg.script_name, '/');
-               if (!ctx.cfg.virtual_root)
-                       ctx.cfg.virtual_root = "";
-       }
+       if (!ctx.cfg.virtual_root && ctx.cfg.script_name)
+               ctx.cfg.virtual_root = ensure_end(ctx.cfg.script_name, '/');
 
        /* If no url parameter is specified on the querystring, lets
         * use PATH_INFO as url. This allows cgit to work with virtual
 
        /* If no url parameter is specified on the querystring, lets
         * use PATH_INFO as url. This allows cgit to work with virtual
@@ -847,24 +1082,31 @@ int main(int argc, const char **argv)
                        path++;
                ctx.qry.url = xstrdup(path);
                if (ctx.qry.raw) {
                        path++;
                ctx.qry.url = xstrdup(path);
                if (ctx.qry.raw) {
-                       qry = ctx.qry.raw;
-                       ctx.qry.raw = xstrdup(fmt("%s?%s", path, qry));
-                       free(qry);
+                       char *newqry = fmtalloc("%s?%s", path, ctx.qry.raw);
+                       free(ctx.qry.raw);
+                       ctx.qry.raw = newqry;
                } else
                        ctx.qry.raw = xstrdup(ctx.qry.url);
                cgit_parse_url(ctx.qry.url);
        }
 
                } else
                        ctx.qry.raw = xstrdup(ctx.qry.url);
                cgit_parse_url(ctx.qry.url);
        }
 
+       /* Before we go any further, we set ctx.env.authenticated by checking to see
+        * if the supplied cookie is valid. All cookies are valid if there is no
+        * auth_filter. If there is an auth_filter, the filter decides. */
+       authenticate_cookie();
+
        ttl = calc_ttl();
        ttl = calc_ttl();
-       ctx.page.expires += ttl * 60;
-       if (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD"))
-               ctx.cfg.nocache = 1;
-       if (ctx.cfg.nocache)
+       if (ttl < 0)
+               ctx.page.expires += 10 * 365 * 24 * 60 * 60; /* 10 years */
+       else
+               ctx.page.expires += ttl * 60;
+       if (!ctx.env.authenticated || (ctx.env.request_method && !strcmp(ctx.env.request_method, "HEAD")))
                ctx.cfg.cache_size = 0;
        err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
                ctx.cfg.cache_size = 0;
        err = cache_process(ctx.cfg.cache_size, ctx.cfg.cache_root,
-                           ctx.qry.raw, ttl, process_request, &ctx);
+                           ctx.qry.raw, ttl, process_request);
+       cgit_cleanup_filters();
        if (err)
        if (err)
-               cgit_print_error(fmt("Error processing page: %s (%d)",
-                                    strerror(err), err));
+               cgit_print_error("Error processing page: %s (%d)",
+                                strerror(err), err);
        return err;
 }
        return err;
 }
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