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Add the ability to prefix something to the pathname to "checkout-cache.c"
This basically makes it trivial to use checkout-cache as a "export as tree" function. Just read the desired tree into the index, and do a checkout-cache --prefix=export-dir/ -a and checkout-cache will "export" the cache into the specified directory. NOTE! The final "/" is important. The exported name is literally just prefixed with the specified string, so you can also do something like checkout-cache --prefix=.merged- Makefile to check out the currently cached copy of "Makefile" into the file ".merged-Makefile".
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@ -32,6 +32,8 @@
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* of "-a" causing problems (not possible in the above example,
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* but get used to it in scripting!).
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*/
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#include <sys/param.h>
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#include "cache.h"
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static int force = 0, quiet = 0;
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@ -65,7 +67,7 @@ static int create_file(const char *path, unsigned int mode)
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return fd;
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}
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static int write_entry(struct cache_entry *ce)
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static int write_entry(struct cache_entry *ce, const char *path)
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{
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int fd;
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void *new;
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@ -76,33 +78,38 @@ static int write_entry(struct cache_entry *ce)
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new = read_sha1_file(ce->sha1, type, &size);
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if (!new || strcmp(type, "blob")) {
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return error("checkout-cache: unable to read sha1 file of %s (%s)",
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ce->name, sha1_to_hex(ce->sha1));
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path, sha1_to_hex(ce->sha1));
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}
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fd = create_file(ce->name, ntohl(ce->ce_mode));
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fd = create_file(path, ntohl(ce->ce_mode));
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if (fd < 0) {
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free(new);
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return error("checkout-cache: unable to create %s (%s)",
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ce->name, strerror(errno));
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path, strerror(errno));
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}
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wrote = write(fd, new, size);
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close(fd);
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free(new);
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if (wrote != size)
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return error("checkout-cache: unable to write %s", ce->name);
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return error("checkout-cache: unable to write %s", path);
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return 0;
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}
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static int checkout_entry(struct cache_entry *ce)
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static int checkout_entry(struct cache_entry *ce, const char *base_dir)
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{
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struct stat st;
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static char path[MAXPATHLEN+1];
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int len = strlen(base_dir);
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if (!stat(ce->name, &st)) {
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memcpy(path, base_dir, len);
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strcpy(path + len, ce->name);
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if (!stat(path, &st)) {
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unsigned changed = cache_match_stat(ce, &st);
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if (!changed)
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return 0;
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if (!force) {
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if (!quiet)
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fprintf(stderr, "checkout-cache: %s already exists\n", ce->name);
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fprintf(stderr, "checkout-cache: %s already exists\n", path);
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return 0;
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}
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@ -112,12 +119,12 @@ static int checkout_entry(struct cache_entry *ce)
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* to emulate by hand - much easier to let the system
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* just do the right thing)
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*/
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unlink(ce->name);
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unlink(path);
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}
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return write_entry(ce);
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return write_entry(ce, path);
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}
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static int checkout_file(const char *name)
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static int checkout_file(const char *name, const char *base_dir)
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{
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int pos = cache_name_pos(name, strlen(name));
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if (pos < 0) {
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@ -132,10 +139,10 @@ static int checkout_file(const char *name)
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}
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return -1;
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}
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return checkout_entry(active_cache[pos]);
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return checkout_entry(active_cache[pos], base_dir);
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}
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static int checkout_all(void)
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static int checkout_all(const char *base_dir)
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{
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int i;
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@ -143,7 +150,7 @@ static int checkout_all(void)
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struct cache_entry *ce = active_cache[i];
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if (ce_stage(ce))
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continue;
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if (checkout_entry(ce) < 0)
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if (checkout_entry(ce, base_dir) < 0)
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return -1;
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}
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return 0;
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@ -152,6 +159,7 @@ static int checkout_all(void)
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int main(int argc, char **argv)
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{
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int i, force_filename = 0;
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const char *base_dir = "";
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if (read_cache() < 0) {
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die("invalid cache");
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@ -161,7 +169,7 @@ int main(int argc, char **argv)
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const char *arg = argv[i];
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if (!force_filename) {
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if (!strcmp(arg, "-a")) {
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checkout_all();
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checkout_all(base_dir);
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continue;
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}
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if (!strcmp(arg, "--")) {
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@ -176,8 +184,12 @@ int main(int argc, char **argv)
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quiet = 1;
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continue;
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}
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if (!memcmp(arg, "--prefix=", 9)) {
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base_dir = arg+9;
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continue;
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}
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}
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checkout_file(arg);
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checkout_file(arg, base_dir);
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}
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return 0;
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}
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