3c249c9506
This allows the programs to use various simplified versions of the SHA1 names, eg just say "HEAD" for the SHA1 pointed to by the .git/HEAD file etc. For example, this commit has been done with git-commit-tree $(git-write-tree) -p HEAD instead of the traditional "$(cat .git/HEAD)" syntax.
82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
#include "cache.h"
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#include "commit.h"
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/*
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* Show one commit
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*/
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void show_commit(struct commit *commit)
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{
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char cmdline[400];
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char hex[100];
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strcpy(hex, sha1_to_hex(commit->object.sha1));
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printf("Id: %s\n", hex);
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fflush(NULL);
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sprintf(cmdline, "cat-file commit %s", hex);
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system(cmdline);
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if (commit->parents) {
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char *against = sha1_to_hex(commit->parents->item->object.sha1);
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printf("\n\n======== diff against %s ========\n", against);
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fflush(NULL);
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sprintf(cmdline, "git-diff-tree -p %s %s", against, hex);
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system(cmdline);
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}
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printf("======== end ========\n\n");
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}
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/*
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* Show all unseen commits, depth-first
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*/
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void show_unseen(struct commit *top)
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{
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struct commit_list *parents;
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if (top->object.flags & 2)
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return;
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top->object.flags |= 2;
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parents = top->parents;
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while (parents) {
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show_unseen(parents->item);
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parents = parents->next;
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}
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show_commit(top);
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}
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void export(struct commit *top, struct commit *base)
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{
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mark_reachable(&top->object, 1);
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if (base)
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mark_reachable(&base->object, 2);
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show_unseen(top);
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}
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struct commit *get_commit(unsigned char *sha1)
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{
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struct commit *commit = lookup_commit(sha1);
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if (!commit->object.parsed) {
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struct commit_list *parents;
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if (parse_commit(commit) < 0)
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die("unable to parse commit %s", sha1_to_hex(sha1));
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parents = commit->parents;
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while (parents) {
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get_commit(parents->item->object.sha1);
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parents = parents->next;
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}
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}
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return commit;
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}
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int main(int argc, char **argv)
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{
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unsigned char base_sha1[20];
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unsigned char top_sha1[20];
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if (argc < 2 || argc > 4 ||
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get_sha1(argv[1], top_sha1) ||
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(argc == 3 && get_sha1(argv[2], base_sha1)))
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usage("git-export top [base]");
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export(get_commit(top_sha1), argc==3 ? get_commit(base_sha1) : NULL);
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return 0;
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}
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