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authorLars Hjemli <hjemli@gmail.com>2008-10-11 18:09:42 (UTC)
committer Lars Hjemli <hjemli@gmail.com>2008-10-11 18:09:42 (UTC)
commited7ff095ca467cdc4c8a1a1459847d68e50c9b91 (patch) (side-by-side diff)
tree4ed7425520cb76eff0a4e7756869620b2562b6c9
parent5632ba35d133ee29d46c031cdd4b4a37097b8ca1 (diff)
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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 (more/less context) (ignore whitespace changes)
-rw-r--r--cmd.c2
-rw-r--r--ui-snapshot.c94
-rw-r--r--ui-snapshot.h2
3 files changed, 83 insertions, 15 deletions
diff --git a/cmd.c b/cmd.c
index a989220..5b3c14c 100644
--- a/cmd.c
+++ b/cmd.c
@@ -45,121 +45,121 @@ static void about_fn(struct cgit_context *ctx)
static void blob_fn(struct cgit_context *ctx)
{
cgit_print_blob(ctx->qry.sha1, ctx->qry.path, ctx->qry.head);
}
static void commit_fn(struct cgit_context *ctx)
{
cgit_print_commit(ctx->qry.sha1);
}
static void diff_fn(struct cgit_context *ctx)
{
cgit_print_diff(ctx->qry.sha1, ctx->qry.sha2, ctx->qry.path);
}
static void info_fn(struct cgit_context *ctx)
{
cgit_clone_info(ctx);
}
static void log_fn(struct cgit_context *ctx)
{
cgit_print_log(ctx->qry.sha1, ctx->qry.ofs, ctx->cfg.max_commit_count,
ctx->qry.grep, ctx->qry.search, ctx->qry.path, 1);
}
static void ls_cache_fn(struct cgit_context *ctx)
{
ctx->page.mimetype = "text/plain";
ctx->page.filename = "ls-cache.txt";
cgit_print_http_headers(ctx);
cache_ls(ctx->cfg.cache_root);
}
static void objects_fn(struct cgit_context *ctx)
{
cgit_clone_objects(ctx);
}
static void repolist_fn(struct cgit_context *ctx)
{
cgit_print_repolist();
}
static void patch_fn(struct cgit_context *ctx)
{
cgit_print_patch(ctx->qry.sha1);
}
static void plain_fn(struct cgit_context *ctx)
{
cgit_print_plain(ctx);
}
static void refs_fn(struct cgit_context *ctx)
{
cgit_print_refs();
}
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)
{
cgit_print_summary();
}
static void tag_fn(struct cgit_context *ctx)
{
cgit_print_tag(ctx->qry.sha1);
}
static void tree_fn(struct cgit_context *ctx)
{
cgit_print_tree(ctx->qry.sha1, ctx->qry.path);
}
#define def_cmd(name, want_repo, want_layout) \
{#name, name##_fn, want_repo, want_layout}
struct cgit_cmd *cgit_get_cmd(struct cgit_context *ctx)
{
static struct cgit_cmd cmds[] = {
def_cmd(HEAD, 1, 0),
def_cmd(atom, 1, 0),
def_cmd(about, 0, 1),
def_cmd(blob, 1, 0),
def_cmd(commit, 1, 1),
def_cmd(diff, 1, 1),
def_cmd(info, 1, 0),
def_cmd(log, 1, 1),
def_cmd(ls_cache, 0, 0),
def_cmd(objects, 1, 0),
def_cmd(patch, 1, 0),
def_cmd(plain, 1, 0),
def_cmd(refs, 1, 1),
def_cmd(repolist, 0, 0),
def_cmd(snapshot, 1, 0),
def_cmd(summary, 1, 1),
def_cmd(tag, 1, 1),
def_cmd(tree, 1, 1),
};
int i;
if (ctx->qry.page == NULL) {
if (ctx->repo)
ctx->qry.page = "summary";
else
ctx->qry.page = "repolist";
}
for(i = 0; i < sizeof(cmds)/sizeof(*cmds); i++)
if (!strcmp(ctx->qry.page, cmds[i].name))
return &cmds[i];
return NULL;
}
diff --git a/ui-snapshot.c b/ui-snapshot.c
index 7a597ff..9c4d086 100644
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -3,118 +3,186 @@
* 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);
}
diff --git a/ui-snapshot.h b/ui-snapshot.h
index 6e03761..3540303 100644
--- a/ui-snapshot.h
+++ b/ui-snapshot.h
@@ -1,8 +1,8 @@
#ifndef UI_SNAPSHOT_H
#define UI_SNAPSHOT_H
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 */