/* ui-snapshot.c: generate snapshot of a commit
*
* Copyright (C) 2006 Lars Hjemli
+ * Copyright (C) 2012 Jason A. Donenfeld <Jason@zx2c4.com>
*
* Licensed under GNU General Public License v2
* (see COPYING for full license text)
*/
#include "cgit.h"
+#include "ui-snapshot.h"
+#include "html.h"
+#include "ui-shared.h"
-static const struct snapshot_archive_t {
- const char *suffix;
- const char *mimetype;
- write_archive_fn_t write_func;
-} snapshot_archives[] = {
- { ".zip", "application/x-zip", write_zip_archive },
- { ".tar.gz", "application/x-gzip", write_tar_archive }
+static int write_archive_type(const char *format, const char *hex, const char *prefix)
+{
+ struct argv_array argv = ARGV_ARRAY_INIT;
+ argv_array_push(&argv, "snapshot");
+ argv_array_push(&argv, format);
+ if (prefix) {
+ argv_array_push(&argv, "--prefix");
+ argv_array_push(&argv, fmt("%s/", prefix));
+ }
+ argv_array_push(&argv, hex);
+ return write_archive(argv.argc, argv.argv, NULL, 1, NULL, 0);
+}
+
+static int write_tar_archive(const char *hex, const char *prefix)
+{
+ return write_archive_type("--format=tar", hex, prefix);
+}
+
+static int write_zip_archive(const char *hex, const char *prefix)
+{
+ return write_archive_type("--format=zip", hex, prefix);
+}
+
+static int write_compressed_tar_archive(const char *hex,
+ const char *prefix,
+ char *filter_argv[])
+{
+ int rv;
+ struct cgit_filter f;
+
+ f.cmd = filter_argv[0];
+ f.argv = filter_argv;
+ cgit_open_filter(&f);
+ rv = write_tar_archive(hex, prefix);
+ cgit_close_filter(&f);
+ return rv;
+}
+
+static int write_tar_gzip_archive(const char *hex, const char *prefix)
+{
+ char *argv[] = { "gzip", "-n", NULL };
+ return write_compressed_tar_archive(hex, prefix, argv);
+}
+
+static int write_tar_bzip2_archive(const char *hex, const char *prefix)
+{
+ char *argv[] = { "bzip2", NULL };
+ return write_compressed_tar_archive(hex, prefix, argv);
+}
+
+static int write_tar_xz_archive(const char *hex, const char *prefix)
+{
+ char *argv[] = { "xz", NULL };
+ return write_compressed_tar_archive(hex, prefix, argv);
+}
+
+const struct cgit_snapshot_format cgit_snapshot_formats[] = {
+ { ".zip", "application/x-zip", write_zip_archive, 0x01 },
+ { ".tar.gz", "application/x-gzip", write_tar_gzip_archive, 0x02 },
+ { ".tar.bz2", "application/x-bzip2", write_tar_bzip2_archive, 0x04 },
+ { ".tar", "application/x-tar", write_tar_archive, 0x08 },
+ { ".tar.xz", "application/x-xz", write_tar_xz_archive, 0x10 },
+ { NULL }
};
-void cgit_print_snapshot(struct cacheitem *item, const char *hex,
- const char *prefix, const char *filename)
+static const struct cgit_snapshot_format *get_format(const char *filename)
{
- int fnl = strlen(filename);
- int f;
- for(f=0;f<(sizeof(snapshot_archives)/sizeof(*snapshot_archives));++f) {
- const struct snapshot_archive_t* sat = &snapshot_archives[f];
- int sl = strlen(sat->suffix);
- if(fnl<sl || strcmp(&filename[fnl-sl],sat->suffix))
+ const struct cgit_snapshot_format *fmt;
+ int fl, sl;
+
+ fl = strlen(filename);
+ for (fmt = cgit_snapshot_formats; fmt->suffix; fmt++) {
+ sl = strlen(fmt->suffix);
+ if (sl >= fl)
continue;
+ if (!strcmp(fmt->suffix, filename + fl - sl))
+ return fmt;
+ }
+ return NULL;
+}
- struct archiver_args args;
- struct commit *commit;
- unsigned char sha1[20];
+static int make_snapshot(const struct cgit_snapshot_format *format,
+ const char *hex, const char *prefix,
+ const char *filename)
+{
+ unsigned char sha1[20];
- if(get_sha1(hex, sha1)) {
- cgit_print_error(fmt("Bad object id: %s", hex));
- return;
- }
- commit = lookup_commit_reference(sha1);
+ if (get_sha1(hex, sha1)) {
+ cgit_print_error(fmt("Bad object id: %s", hex));
+ return 1;
+ }
+ if (!lookup_commit_reference(sha1)) {
+ cgit_print_error(fmt("Not a commit reference: %s", hex));
+ return 1;
+ }
+ ctx.page.mimetype = xstrdup(format->mimetype);
+ ctx.page.filename = xstrdup(filename);
+ cgit_print_http_headers(&ctx);
+ format->write_func(hex, prefix);
+ return 0;
+}
- if(!commit) {
- cgit_print_error(fmt("Not a commit reference: %s", hex));
- return;;
- }
+/* Try to guess the requested revision from the requested snapshot name.
+ * First the format extension is stripped, e.g. "cgit-0.7.2.tar.gz" become
+ * "cgit-0.7.2". If this is a valid commit object name we've got a winner.
+ * Otherwise, if the snapshot name has a prefix matching the result from
+ * repo_basename(), we strip the basename and any following '-' and '_'
+ * characters ("cgit-0.7.2" -> "0.7.2") and check the resulting name once
+ * more. If this still isn't a valid commit object name, we check if pre-
+ * pending a 'v' to the remaining snapshot name ("0.7.2" -> "v0.7.2") gives
+ * us something valid.
+ */
+static const char *get_ref_from_filename(const char *url, const char *filename,
+ const struct cgit_snapshot_format *format)
+{
+ const char *reponame;
+ unsigned char sha1[20];
+ char *snapshot;
- memset(&args,0,sizeof(args));
- args.base = fmt("%s/", prefix);
- args.tree = commit->tree;
+ snapshot = xstrdup(filename);
+ snapshot[strlen(snapshot) - strlen(format->suffix)] = '\0';
- cgit_print_snapshot_start(sat->mimetype, filename, item);
- (*sat->write_func)(&args);
- return;
+ if (get_sha1(snapshot, sha1) == 0)
+ return snapshot;
+
+ reponame = cgit_repobasename(url);
+ if (prefixcmp(snapshot, reponame) == 0) {
+ snapshot += strlen(reponame);
+ while (snapshot && (*snapshot == '-' || *snapshot == '_'))
+ snapshot++;
}
- cgit_print_error(fmt("Unsupported snapshot format: %s", filename));
+
+ if (get_sha1(snapshot, sha1) == 0)
+ return snapshot;
+
+ snapshot = fmt("v%s", snapshot);
+ if (get_sha1(snapshot, sha1) == 0)
+ return snapshot;
+
+ return NULL;
}
-void cgit_print_snapshot_links(const char *repo,const char *hex)
+static void show_error(char *msg)
{
- char *filename;
- int f;
- for(f=0;f<(sizeof(snapshot_archives)/sizeof(*snapshot_archives));++f) {
- const struct snapshot_archive_t* sat = &snapshot_archives[f];
- filename = fmt("%s-%s%s",repo,hex,sat->suffix);
- htmlf("<a href='%s'>%s</a><br/>",
- cgit_pageurl(repo,"snapshot",
- fmt("id=%s&name=%s",hex,filename)), filename);
+ ctx.page.mimetype = "text/html";
+ cgit_print_http_headers(&ctx);
+ cgit_print_docstart(&ctx);
+ cgit_print_pageheader(&ctx);
+ cgit_print_error(msg);
+ cgit_print_docend();
+}
+
+void cgit_print_snapshot(const char *head, const char *hex,
+ const char *filename, int snapshots, int dwim)
+{
+ const struct cgit_snapshot_format* f;
+ char *prefix = NULL;
+
+ if (!filename) {
+ show_error("No snapshot name specified");
+ return;
}
+
+ f = get_format(filename);
+ if (!f) {
+ show_error(xstrdup(fmt("Unsupported snapshot format: %s",
+ filename)));
+ return;
+ }
+
+ if (!hex && dwim) {
+ hex = get_ref_from_filename(ctx.repo->url, filename, f);
+ if (hex == NULL) {
+ html_status(404, "Not found", 0);
+ return;
+ }
+ prefix = xstrdup(filename);
+ prefix[strlen(filename) - strlen(f->suffix)] = '\0';
+ }
+
+ if (!hex)
+ hex = head;
+
+ if (!prefix)
+ prefix = xstrdup(cgit_repobasename(ctx.repo->url));
+
+ make_snapshot(f, hex, prefix, filename);
+ free(prefix);
}
git.ckatri.com / cgit.git / blobdiff