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Refactoring: Split up diff_tree_stdin

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Into a first half that determines what operation to do, and a second
half that does it.

Currently the only operation is diffing one or more commits, but a
later patch will add diffing of trees, at which point this refactoring
will pay off.

Signed-off-by: Karl Hasselström <kha@treskal.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Karl Hasselström 2008-08-08 22:48:23 +02:00 committed by Junio C Hamano
parent 71b9979bc7
commit a57114c818
1 changed files with 19 additions and 12 deletions
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31
builtin-diff-tree.c
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@ -14,20 +14,10 @@ static int diff_tree_commit_sha1(const unsigned char *sha1)
return log_tree_commit(&log_tree_opt, commit);
}
static int diff_tree_stdin(char *line)
/* Diff one or more commits. */
static int stdin_diff_commit(struct commit *commit, char *line, int len)
{
int len = strlen(line);
unsigned char sha1[20];
struct commit *commit;
if (!len || line[len-1] != '\n')
return -1;
line[len-1] = 0;
if (get_sha1_hex(line, sha1))
return -1;
commit = lookup_commit(sha1);
if (!commit || parse_commit(commit))
return -1;
if (isspace(line[40]) && !get_sha1_hex(line+41, sha1)) {
/* Graft the fake parents locally to the commit */
int pos = 41;
@ -52,6 +42,23 @@ static int diff_tree_stdin(char *line)
return log_tree_commit(&log_tree_opt, commit);
}
static int diff_tree_stdin(char *line)
{
int len = strlen(line);
unsigned char sha1[20];
struct commit *commit;
if (!len || line[len-1] != '\n')
return -1;
line[len-1] = 0;
if (get_sha1_hex(line, sha1))
return -1;
commit = lookup_commit(sha1);
if (!commit || parse_commit(commit))
return -1;
return stdin_diff_commit(commit, line, len);
}
static const char diff_tree_usage[] =
"git diff-tree [--stdin] [-m] [-c] [--cc] [-s] [-v] [--pretty] [-t] [-r] [--root] "
"[<common diff options>] <tree-ish> [<tree-ish>] [<path>...]\n"