| -rw-r--r-- | ui-snapshot.c | 94 |
1 files changed, 81 insertions, 13 deletions
diff --git a/ui-snapshot.c b/ui-snapshot.c index 7a597ff..9c4d086 100644 --- a/ui-snapshot.c +++ b/ui-snapshot.c @@ -1,120 +1,188 @@ /* ui-snapshot.c: generate snapshot of a commit * * Copyright (C) 2006 Lars Hjemli * * Licensed under GNU General Public License v2 * (see COPYING for full license text) */ #include "cgit.h" #include "html.h" #include "ui-shared.h" static int write_compressed_tar_archive(struct archiver_args *args,const char *filter) { int rw[2]; pid_t gzpid; int stdout2; int status; int rv; 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"); 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"); return rv; } static int write_tar_gzip_archive(struct archiver_args *args) { return write_compressed_tar_archive(args,"gzip"); } static int write_tar_bzip2_archive(struct archiver_args *args) { return write_compressed_tar_archive(args,"bzip2"); } 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 }, {} }; +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) { struct archiver_args args; struct commit *commit; unsigned char sha1[20]; if(get_sha1(hex, sha1)) { cgit_print_error(fmt("Bad object id: %s", hex)); return 1; } commit = lookup_commit_reference(sha1); if(!commit) { cgit_print_error(fmt("Not a commit reference: %s", hex)); return 1; } memset(&args, 0, sizeof(args)); if (prefix) { args.base = fmt("%s/", prefix); args.baselen = strlen(prefix) + 1; } else { args.base = ""; args.baselen = 0; } args.tree = commit->tree; args.time = commit->date; ctx.page.mimetype = xstrdup(format->mimetype); ctx.page.filename = xstrdup(filename); cgit_print_http_headers(&ctx); format->write_func(&args); return 0; } +char *dwim_filename = NULL; +const char *dwim_refname = NULL; + +static int ref_cb(const char *refname, const unsigned char *sha1, int flags, + void *cb_data) +{ + const char *r = refname; + while (r && *r) { + fprintf(stderr, " cmp %s with %s:", dwim_filename, r); + if (!strcmp(dwim_filename, r)) { + fprintf(stderr, "MATCH!\n"); + dwim_refname = refname; + return 1; + } + fprintf(stderr, "no match\n"); + if (isdigit(*r)) + break; + r++; + } + return 0; +} + +/* Try to guess the requested revision by combining repo name and tag name + * and comparing this to the requested snapshot name. E.g. the requested + * snapshot is "cgit-0.7.2.tar.gz" while repo name is "cgit" and tag name + * is "v0.7.2". First, the reponame is stripped off, leaving "-0.7.2.tar.gz". + * Next, any '-' and '_' characters are stripped, leaving "0.7.2.tar.gz". + * Finally, the requested format suffix is removed and we end up with "0.7.2". + * Then we test each tag against this dwimmed filename, and for each tag + * we even try to remove any leading characters which are non-digits. I.e. + * we first compare with "v0.7.2", then with "0.7.2" and we've got a match. + */ +static const char *get_ref_from_filename(const char *url, const char *filename, + const struct cgit_snapshot_format *fmt) +{ + const char *reponame = cgit_repobasename(url); + fprintf(stderr, "reponame=%s, filename=%s\n", reponame, filename); + if (prefixcmp(filename, reponame)) + return NULL; + filename += strlen(reponame); + while (filename && (*filename == '-' || *filename == '_')) + filename++; + dwim_filename = xstrdup(filename); + dwim_filename[strlen(filename) - strlen(fmt->suffix)] = '\0'; + for_each_tag_ref(ref_cb, NULL); + return dwim_refname; +} + void cgit_print_snapshot(const char *head, const char *hex, const char *prefix, - const char *filename, int snapshots) + const char *filename, int snapshots, int dwim) { const struct cgit_snapshot_format* f; - int sl, fnl; - 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); + f = get_format(filename); + if (!f) { + ctx.page.mimetype = "text/html"; + cgit_print_http_headers(&ctx); + cgit_print_docstart(&ctx); + cgit_print_pageheader(&ctx); + cgit_print_error(fmt("Unsupported snapshot format: %s", filename)); + cgit_print_docend(); return; } - cgit_print_error(fmt("Unsupported snapshot format: %s", filename)); + + if (!hex && dwim) + hex = get_ref_from_filename(ctx.repo->url, filename, f); + + if (!hex) + hex = head; + + make_snapshot(f, hex, prefix, filename); } |