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Add stupid "git export" thing, which can export a git archive

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as a set of patches and commentary.

You'd want something like this if you are tracking a git archive
in another SCM format. Notably, we want something like that for
BK users.
This commit is contained in:
Linus Torvalds 2005-04-19 14:00:34 -07:00
parent 7fa6b4e769
commit c9823a427a
2 changed files with 86 additions and 1 deletions
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6
Makefile
View file

@ -15,7 +15,7 @@ AR=ar
PROG= update-cache show-diff init-db write-tree read-tree commit-tree \
cat-file fsck-cache checkout-cache diff-tree rev-tree show-files \
check-files ls-tree merge-base merge-cache unpack-file
check-files ls-tree merge-base merge-cache unpack-file git-export
all: $(PROG)
@ -81,6 +81,9 @@ merge-cache: merge-cache.o $(LIB_FILE)
unpack-file: unpack-file.o $(LIB_FILE)
$(CC) $(CFLAGS) -o unpack-file unpack-file.o $(LIBS)
git-export: git-export.o $(LIB_FILE)
$(CC) $(CFLAGS) -o git-export git-export.o $(LIBS)
blob.o: $(LIB_H)
cat-file.o: $(LIB_H)
check-files.o: $(LIB_H)
@ -89,6 +92,7 @@ commit.o: $(LIB_H)
commit-tree.o: $(LIB_H)
diff-tree.o: $(LIB_H)
fsck-cache.o: $(LIB_H)
git_export.o: $(LIB_H)
init-db.o: $(LIB_H)
ls-tree.o: $(LIB_H)
merge-base.o: $(LIB_H)

81
git-export.c Normal file
View file

@ -0,0 +1,81 @@
#include "cache.h"
#include "commit.h"
/*
* Show one commit
*/
void show_commit(struct commit *commit)
{
char cmdline[400];
char hex[100];
strcpy(hex, sha1_to_hex(commit->object.sha1));
printf("Id: %s\n", hex);
fflush(NULL);
sprintf(cmdline, "cat-file commit %s", hex);
system(cmdline);
if (commit->parents) {
char *against = sha1_to_hex(commit->parents->item->object.sha1);
printf("\n\n======== diff against %s ========\n", against);
fflush(NULL);
sprintf(cmdline, "git diff %s %s", against, hex);
system(cmdline);
}
printf("======== end ========\n\n");
}
/*
* Show all unseen commits, depth-first
*/
void show_unseen(struct commit *top)
{
struct commit_list *parents;
if (top->object.flags & 2)
return;
top->object.flags |= 2;
parents = top->parents;
while (parents) {
show_unseen(parents->item);
parents = parents->next;
}
show_commit(top);
}
void export(struct commit *top, struct commit *base)
{
mark_reachable(&top->object, 1);
if (base)
mark_reachable(&base->object, 2);
show_unseen(top);
}
struct commit *get_commit(unsigned char *sha1)
{
struct commit *commit = lookup_commit(sha1);
if (!commit->object.parsed) {
struct commit_list *parents;
if (parse_commit(commit) < 0)
die("unable to parse commit %s", sha1_to_hex(sha1));
parents = commit->parents;
while (parents) {
get_commit(parents->item->object.sha1);
parents = parents->next;
}
}
return commit;
}
int main(int argc, char **argv)
{
unsigned char base_sha1[20];
unsigned char top_sha1[20];
if (argc < 2 || argc > 4 ||
get_sha1_hex(argv[1], top_sha1) ||
(argc == 3 && get_sha1_hex(argv[2], base_sha1)))
usage("git-export top [base]");
export(get_commit(top_sha1), argc==3 ? get_commit(base_sha1) : NULL);
return 0;
}