1 /* ui-snapshot.c: generate snapshot of a commit
3 * Copyright (C) 2006 Lars Hjemli
5 * Licensed under GNU General Public License v2
6 * (see COPYING for full license text)
11 #include "ui-shared.h"
13 static int write_compressed_tar_archive(struct archiver_args
*args
,const char *filter
)
18 f
.cmd
= xstrdup(filter
);
19 f
.argv
= malloc(2 * sizeof(char *));
22 cgit_open_filter(&f
, NULL
);
23 rv
= write_tar_archive(args
);
24 cgit_close_filter(&f
);
28 static int write_tar_gzip_archive(struct archiver_args
*args
)
30 return write_compressed_tar_archive(args
,"gzip");
33 static int write_tar_bzip2_archive(struct archiver_args
*args
)
35 return write_compressed_tar_archive(args
,"bzip2");
38 static int write_tar_xz_archive(struct archiver_args
*args
)
40 return write_compressed_tar_archive(args
,"xz");
43 const struct cgit_snapshot_format cgit_snapshot_formats
[] = {
44 { ".zip", "application/x-zip", write_zip_archive
, 0x01 },
45 { ".tar.gz", "application/x-gzip", write_tar_gzip_archive
, 0x02 },
46 { ".tar.bz2", "application/x-bzip2", write_tar_bzip2_archive
, 0x04 },
47 { ".tar", "application/x-tar", write_tar_archive
, 0x08 },
48 { ".tar.xz", "application/x-xz", write_tar_xz_archive
, 0x10 },
52 static const struct cgit_snapshot_format
*get_format(const char *filename
)
54 const struct cgit_snapshot_format
*fmt
;
57 fl
= strlen(filename
);
58 for(fmt
= cgit_snapshot_formats
; fmt
->suffix
; fmt
++) {
59 sl
= strlen(fmt
->suffix
);
62 if (!strcmp(fmt
->suffix
, filename
+ fl
- sl
))
68 static int make_snapshot(const struct cgit_snapshot_format
*format
,
69 const char *hex
, const char *prefix
,
72 struct archiver_args args
;
73 struct commit
*commit
;
74 unsigned char sha1
[20];
76 if(get_sha1(hex
, sha1
)) {
77 cgit_print_error(fmt("Bad object id: %s", hex
));
80 commit
= lookup_commit_reference(sha1
);
82 cgit_print_error(fmt("Not a commit reference: %s", hex
));
85 memset(&args
, 0, sizeof(args
));
87 args
.base
= fmt("%s/", prefix
);
88 args
.baselen
= strlen(prefix
) + 1;
93 args
.tree
= commit
->tree
;
94 args
.time
= commit
->date
;
95 args
.compression_level
= Z_DEFAULT_COMPRESSION
;
96 ctx
.page
.mimetype
= xstrdup(format
->mimetype
);
97 ctx
.page
.filename
= xstrdup(filename
);
98 cgit_print_http_headers(&ctx
);
99 format
->write_func(&args
);
103 /* Try to guess the requested revision from the requested snapshot name.
104 * First the format extension is stripped, e.g. "cgit-0.7.2.tar.gz" become
105 * "cgit-0.7.2". If this is a valid commit object name we've got a winner.
106 * Otherwise, if the snapshot name has a prefix matching the result from
107 * repo_basename(), we strip the basename and any following '-' and '_'
108 * characters ("cgit-0.7.2" -> "0.7.2") and check the resulting name once
109 * more. If this still isn't a valid commit object name, we check if pre-
110 * pending a 'v' to the remaining snapshot name ("0.7.2" -> "v0.7.2") gives
111 * us something valid.
113 static const char *get_ref_from_filename(const char *url
, const char *filename
,
114 const struct cgit_snapshot_format
*format
)
116 const char *reponame
;
117 unsigned char sha1
[20];
120 snapshot
= xstrdup(filename
);
121 snapshot
[strlen(snapshot
) - strlen(format
->suffix
)] = '\0';
123 if (get_sha1(snapshot
, sha1
) == 0)
126 reponame
= cgit_repobasename(url
);
127 if (prefixcmp(snapshot
, reponame
) == 0) {
128 snapshot
+= strlen(reponame
);
129 while (snapshot
&& (*snapshot
== '-' || *snapshot
== '_'))
133 if (get_sha1(snapshot
, sha1
) == 0)
136 snapshot
= fmt("v%s", snapshot
);
137 if (get_sha1(snapshot
, sha1
) == 0)
143 void show_error(char *msg
)
145 ctx
.page
.mimetype
= "text/html";
146 cgit_print_http_headers(&ctx
);
147 cgit_print_docstart(&ctx
);
148 cgit_print_pageheader(&ctx
);
149 cgit_print_error(msg
);
153 void cgit_print_snapshot(const char *head
, const char *hex
,
154 const char *filename
, int snapshots
, int dwim
)
156 const struct cgit_snapshot_format
* f
;
160 show_error("No snapshot name specified");
164 f
= get_format(filename
);
166 show_error(xstrdup(fmt("Unsupported snapshot format: %s",
172 hex
= get_ref_from_filename(ctx
.repo
->url
, filename
, f
);
174 html_status(404, "Not found", 0);
177 prefix
= xstrdup(filename
);
178 prefix
[strlen(filename
) - strlen(f
->suffix
)] = '\0';
185 prefix
= xstrdup(cgit_repobasename(ctx
.repo
->url
));
187 make_snapshot(f
, hex
, prefix
, filename
);