neocgit

a more 'modern' version of cgit
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commit ed7ff095ca467cdc4c8a1a1459847d68e50c9b91
parent 5632ba35d133ee29d46c031cdd4b4a37097b8ca1
Author: Lars Hjemli <hjemli@gmail.com>
Date:   Sat, 11 Oct 2008 20:09:42 +0200

ui-snapshot: add dwimmery

When downloading a snapshot, the snapshot name will often contain the repo
name combined with a tag. This patch tries to exploit this so that the
correct revision is downloaded even if no specific revision is specified.

PS: this only occurs if neither 'h' nor 'id' is specified in the query-
string.

PPS: this also fixes a bug which occurs when trying to download a filename
with an unsupported suffix: it used to try to print an error message to
the user but failed since it didn't prepare the output properly.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

Diffstat:
Mcmd.c | 2+-
Mui-snapshot.c | 94++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----------
Mui-snapshot.h | 2+-
3 files changed, 83 insertions(+), 15 deletions(-)

diff --git a/cmd.c b/cmd.c @@ -106,7 +106,7 @@ static void snapshot_fn(struct cgit_context *ctx) { cgit_print_snapshot(ctx->qry.head, ctx->qry.sha1, cgit_repobasename(ctx->repo->url), ctx->qry.path, - ctx->repo->snapshots); + ctx->repo->snapshots, ctx->qry.nohead); } static void summary_fn(struct cgit_context *ctx) diff --git a/ui-snapshot.c b/ui-snapshot.c @@ -64,6 +64,22 @@ const struct cgit_snapshot_format cgit_snapshot_formats[] = { {} }; +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) @@ -98,23 +114,75 @@ static int make_snapshot(const struct cgit_snapshot_format *format, 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); } diff --git a/ui-snapshot.h b/ui-snapshot.h @@ -3,6 +3,6 @@ extern void cgit_print_snapshot(const char *head, const char *hex, const char *prefix, const char *filename, - int snapshot); + int snapshot, int dwim); #endif /* UI_SNAPSHOT_H */