X-Git-Url: https://git.cameronkatri.com/cgit.git/blobdiff_plain/204669ff4a4028a82cc48e9319632595ba3ff703..c0a92e82da3063efc230538ba109ff95aa59589a:/ui-snapshot.c diff --git a/ui-snapshot.c b/ui-snapshot.c index 7a597ff..47432bd 100644 --- a/ui-snapshot.c +++ b/ui-snapshot.c @@ -1,6 +1,7 @@ /* ui-snapshot.c: generate snapshot of a commit * * Copyright (C) 2006 Lars Hjemli + * Copyright (C) 2012 Jason A. Donenfeld * * Licensed under GNU General Public License v2 * (see COPYING for full license text) @@ -10,60 +11,62 @@ #include "html.h" #include "ui-shared.h" -static int write_compressed_tar_archive(struct archiver_args *args,const char *filter) +static int write_compressed_tar_archive(struct archiver_args *args, char *filter_argv[]) { - int rw[2]; - pid_t gzpid; - int stdout2; - int status; int rv; + struct cgit_filter f; - stdout2 = chk_non_negative(dup(STDIN_FILENO), "Preserving STDOUT before compressing"); - chk_zero(pipe(rw), "Opening pipe from compressor subprocess"); - gzpid = chk_non_negative(fork(), "Forking compressor subprocess"); - if(gzpid==0) { - /* child */ - chk_zero(close(rw[1]), "Closing write end of pipe in child"); - chk_zero(close(STDIN_FILENO), "Closing STDIN"); - chk_non_negative(dup2(rw[0],STDIN_FILENO), "Redirecting compressor input to stdin"); - execlp(filter,filter,NULL); - _exit(-1); - } - /* parent */ - chk_zero(close(rw[0]), "Closing read end of pipe"); - chk_non_negative(dup2(rw[1],STDOUT_FILENO), "Redirecting output to compressor"); - + f.cmd = filter_argv[0]; + f.argv = filter_argv; + cgit_open_filter(&f); rv = write_tar_archive(args); - - chk_zero(close(STDOUT_FILENO), "Closing STDOUT redirected to compressor"); - chk_non_negative(dup2(stdout2,STDOUT_FILENO), "Restoring uncompressed STDOUT"); - chk_zero(close(stdout2), "Closing uncompressed STDOUT"); - chk_zero(close(rw[1]), "Closing write end of pipe in parent"); - chk_positive(waitpid(gzpid,&status,0), "Waiting on compressor process"); - if(! ( WIFEXITED(status) && WEXITSTATUS(status)==0 ) ) - cgit_print_error("Failed to compress archive"); - + cgit_close_filter(&f); return rv; } static int write_tar_gzip_archive(struct archiver_args *args) { - return write_compressed_tar_archive(args,"gzip"); + char *argv[] = { "gzip", "-n", NULL }; + return write_compressed_tar_archive(args, argv); } static int write_tar_bzip2_archive(struct archiver_args *args) { - return write_compressed_tar_archive(args,"bzip2"); + char *argv[] = { "bzip2", NULL }; + return write_compressed_tar_archive(args, argv); +} + +static int write_tar_xz_archive(struct archiver_args *args) +{ + char *argv[] = { "xz", NULL }; + return write_compressed_tar_archive(args, argv); } const struct cgit_snapshot_format cgit_snapshot_formats[] = { - { ".zip", "application/x-zip", write_zip_archive, 0x1 }, - { ".tar.gz", "application/x-tar", write_tar_gzip_archive, 0x2 }, - { ".tar.bz2", "application/x-tar", write_tar_bzip2_archive, 0x4 }, - { ".tar", "application/x-tar", write_tar_archive, 0x8 }, + { ".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 }, {} }; +static const struct cgit_snapshot_format *get_format(const char *filename) +{ + 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; +} + static int make_snapshot(const struct cgit_snapshot_format *format, const char *hex, const char *prefix, const char *filename) @@ -91,6 +94,7 @@ static int make_snapshot(const struct cgit_snapshot_format *format, } args.tree = commit->tree; args.time = commit->date; + args.compression_level = Z_DEFAULT_COMPRESSION; ctx.page.mimetype = xstrdup(format->mimetype); ctx.page.filename = xstrdup(filename); cgit_print_http_headers(&ctx); @@ -98,23 +102,90 @@ static int make_snapshot(const struct cgit_snapshot_format *format, return 0; } -void cgit_print_snapshot(const char *head, const char *hex, const char *prefix, - const char *filename, int snapshots) +/* 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; + + snapshot = xstrdup(filename); + snapshot[strlen(snapshot) - strlen(format->suffix)] = '\0'; + + 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++; + } + + if (get_sha1(snapshot, sha1) == 0) + return snapshot; + + snapshot = fmt("v%s", snapshot); + if (get_sha1(snapshot, sha1) == 0) + return snapshot; + + return NULL; +} + +void show_error(char *msg) +{ + 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; - int sl, fnl; + char *prefix = NULL; - fnl = strlen(filename); - if (!hex) - hex = head; - for (f = cgit_snapshot_formats; f->suffix; f++) { - if (!(snapshots & f->bit)) - continue; - sl = strlen(f->suffix); - if(fnl < sl || strcmp(&filename[fnl-sl], f->suffix)) - continue; - make_snapshot(f, hex, prefix, filename); + if (!filename) { + show_error("No snapshot name specified"); return; } - cgit_print_error(fmt("Unsupported snapshot format: %s", filename)); + + 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); }