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authorRené Scharfe <rene.scharfe@lsrfire.ath.cx>2008-07-14 19:22:24 (GMT)
committerJunio C Hamano <gitster@pobox.com>2008-07-15 14:18:04 (GMT)
commit562e25abea9f1f2d443053279c009a88d81a592b (patch)
treed9c85fad9ac3f441f39a1644182b8711da63047e /archive-tar.c
parentd53fe8187c38a5a160ef2199a899d9c47ec881b9 (diff)
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archive: centralize archive entry writing
Add the exported function write_archive_entries() to archive.c, which uses the new ability of read_tree_recursive() to pass a context pointer to its callback in order to centralize previously duplicated code. The new callback function write_archive_entry() does the work that every archiver backend needs to do: loading file contents, entering subdirectories, handling file attributes, constructing the full path of the entry. All that done, it calls the backend specific write_archive_entry_fn_t function. Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx> Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'archive-tar.c')
-rw-r--r--archive-tar.c116
1 files changed, 37 insertions, 79 deletions
diff --git a/archive-tar.c b/archive-tar.c
index 63cc2ec..f9eb726 100644
--- a/archive-tar.c
+++ b/archive-tar.c
@@ -13,11 +13,7 @@
static char block[BLOCKSIZE];
static unsigned long offset;
-static time_t archive_time;
static int tar_umask = 002;
-static int verbose;
-static const struct commit *commit;
-static size_t base_len;
/* writes out the whole block, but only if it is full */
static void write_if_needed(void)
@@ -114,22 +110,24 @@ static unsigned int ustar_header_chksum(const struct ustar_header *header)
return chksum;
}
-static int get_path_prefix(const struct strbuf *path, int maxlen)
+static size_t get_path_prefix(const char *path, size_t pathlen, size_t maxlen)
{
- int i = path->len;
+ size_t i = pathlen;
if (i > maxlen)
i = maxlen;
do {
i--;
- } while (i > 0 && path->buf[i] != '/');
+ } while (i > 0 && path[i] != '/');
return i;
}
-static void write_entry(const unsigned char *sha1, struct strbuf *path,
- unsigned int mode, void *buffer, unsigned long size)
+static int write_tar_entry(struct archiver_args *args,
+ const unsigned char *sha1, const char *path, size_t pathlen,
+ unsigned int mode, void *buffer, unsigned long size)
{
struct ustar_header header;
struct strbuf ext_header;
+ int err = 0;
memset(&header, 0, sizeof(header));
strbuf_init(&ext_header, 0);
@@ -143,8 +141,6 @@ static void write_entry(const unsigned char *sha1, struct strbuf *path,
mode = 0100666;
sprintf(header.name, "%s.paxheader", sha1_to_hex(sha1));
} else {
- if (verbose)
- fprintf(stderr, "%.*s\n", (int)path->len, path->buf);
if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
*header.typeflag = TYPEFLAG_DIR;
mode = (mode | 0777) & ~tar_umask;
@@ -155,24 +151,24 @@ static void write_entry(const unsigned char *sha1, struct strbuf *path,
*header.typeflag = TYPEFLAG_REG;
mode = (mode | ((mode & 0100) ? 0777 : 0666)) & ~tar_umask;
} else {
- error("unsupported file mode: 0%o (SHA1: %s)",
- mode, sha1_to_hex(sha1));
- return;
+ return error("unsupported file mode: 0%o (SHA1: %s)",
+ mode, sha1_to_hex(sha1));
}
- if (path->len > sizeof(header.name)) {
- int plen = get_path_prefix(path, sizeof(header.prefix));
- int rest = path->len - plen - 1;
+ if (pathlen > sizeof(header.name)) {
+ size_t plen = get_path_prefix(path, pathlen,
+ sizeof(header.prefix));
+ size_t rest = pathlen - plen - 1;
if (plen > 0 && rest <= sizeof(header.name)) {
- memcpy(header.prefix, path->buf, plen);
- memcpy(header.name, path->buf + plen + 1, rest);
+ memcpy(header.prefix, path, plen);
+ memcpy(header.name, path + plen + 1, rest);
} else {
sprintf(header.name, "%s.data",
sha1_to_hex(sha1));
strbuf_append_ext_header(&ext_header, "path",
- path->buf, path->len);
+ path, pathlen);
}
} else
- memcpy(header.name, path->buf, path->len);
+ memcpy(header.name, path, pathlen);
}
if (S_ISLNK(mode) && buffer) {
@@ -187,7 +183,7 @@ static void write_entry(const unsigned char *sha1, struct strbuf *path,
sprintf(header.mode, "%07o", mode & 07777);
sprintf(header.size, "%011lo", S_ISREG(mode) ? size : 0);
- sprintf(header.mtime, "%011lo", archive_time);
+ sprintf(header.mtime, "%011lo", args->time);
sprintf(header.uid, "%07o", 0);
sprintf(header.gid, "%07o", 0);
@@ -202,22 +198,30 @@ static void write_entry(const unsigned char *sha1, struct strbuf *path,
sprintf(header.chksum, "%07o", ustar_header_chksum(&header));
if (ext_header.len > 0) {
- write_entry(sha1, NULL, 0, ext_header.buf, ext_header.len);
+ err = write_tar_entry(args, sha1, NULL, 0, 0, ext_header.buf,
+ ext_header.len);
+ if (err)
+ return err;
}
strbuf_release(&ext_header);
write_blocked(&header, sizeof(header));
if (S_ISREG(mode) && buffer && size > 0)
write_blocked(buffer, size);
+ return err;
}
-static void write_global_extended_header(const unsigned char *sha1)
+static int write_global_extended_header(struct archiver_args *args)
{
+ const unsigned char *sha1 = args->commit_sha1;
struct strbuf ext_header;
+ int err;
strbuf_init(&ext_header, 0);
strbuf_append_ext_header(&ext_header, "comment", sha1_to_hex(sha1), 40);
- write_entry(NULL, NULL, 0, ext_header.buf, ext_header.len);
+ err = write_tar_entry(args, NULL, NULL, 0, 0, ext_header.buf,
+ ext_header.len);
strbuf_release(&ext_header);
+ return err;
}
static int git_tar_config(const char *var, const char *value, void *cb)
@@ -234,63 +238,17 @@ static int git_tar_config(const char *var, const char *value, void *cb)
return git_default_config(var, value, cb);
}
-static int write_tar_entry(const unsigned char *sha1, const char *base,
- int baselen, const char *filename, unsigned mode, int stage,
- void *context)
-{
- static struct strbuf path = STRBUF_INIT;
- void *buffer;
- enum object_type type;
- unsigned long size;
-
- strbuf_reset(&path);
- strbuf_grow(&path, PATH_MAX);
- strbuf_add(&path, base, baselen);
- strbuf_addstr(&path, filename);
- if (is_archive_path_ignored(path.buf + base_len))
- return 0;
- if (S_ISDIR(mode) || S_ISGITLINK(mode)) {
- strbuf_addch(&path, '/');
- buffer = NULL;
- size = 0;
- } else {
- buffer = sha1_file_to_archive(path.buf + base_len, sha1, mode,
- &type, &size, commit);
- if (!buffer)
- die("cannot read %s", sha1_to_hex(sha1));
- }
-
- write_entry(sha1, &path, mode, buffer, size);
- free(buffer);
-
- return READ_TREE_RECURSIVE;
-}
-
int write_tar_archive(struct archiver_args *args)
{
- git_config(git_tar_config, NULL);
+ int err = 0;
- archive_time = args->time;
- verbose = args->verbose;
- commit = args->commit;
- base_len = args->baselen;
+ git_config(git_tar_config, NULL);
if (args->commit_sha1)
- write_global_extended_header(args->commit_sha1);
-
- if (args->baselen > 0 && args->base[args->baselen - 1] == '/') {
- char *base = xstrdup(args->base);
- int baselen = strlen(base);
-
- while (baselen > 0 && base[baselen - 1] == '/')
- base[--baselen] = '\0';
- write_tar_entry(args->tree->object.sha1, "", 0, base, 040777,
- 0, NULL);
- free(base);
- }
- read_tree_recursive(args->tree, args->base, args->baselen, 0,
- args->pathspec, write_tar_entry, NULL);
- write_trailer();
-
- return 0;
+ err = write_global_extended_header(args);
+ if (!err)
+ err = write_archive_entries(args, write_tar_entry);
+ if (!err)
+ write_trailer();
+ return err;
}