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9153983310
On Sun, 16 Apr 2006, Junio C Hamano wrote:
>
> In the mid-term, I am hoping we can drop the generate_header()
> callchain _and_ the custom code that formats commit log in-core,
> found in cmd_log_wc().
Ok, this was nastier than expected, just because the dependencies between
the different log-printing stuff were absolutely _everywhere_, but here's
a patch that does exactly that.
The patch is not very easy to read, and the "--patch-with-stat" thing is
still broken (it does not call the "show_log()" thing properly for
merges). That's not a new bug. In the new world order it _should_ do
something like
if (rev->logopt)
show_log(rev, rev->logopt, "---\n");
but it doesn't. I haven't looked at the --with-stat logic, so I left it
alone.
That said, this patch removes more lines than it adds, and in particular,
the "cmd_log_wc()" loop is now a very clean:
while ((commit = get_revision(rev)) != NULL) {
log_tree_commit(rev, commit);
free(commit->buffer);
commit->buffer = NULL;
}
so it doesn't get much prettier than this. All the complexity is entirely
hidden in log-tree.c, and any code that needs to flush the log literally
just needs to do the "if (rev->logopt) show_log(...)" incantation.
I had to make the combined_diff() logic take a "struct rev_info" instead
of just a "struct diff_options", but that part is pretty clean.
This does change "git whatchanged" from using "diff-tree" as the commit
descriptor to "commit", and I changed one of the tests to reflect that new
reality. Otherwise everything still passes, and my other tests look fine
too.
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Signed-off-by: Junio C Hamano <junkio@cox.net>
144 lines
3.2 KiB
C
144 lines
3.2 KiB
C
#include "cache.h"
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#include "diff.h"
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#include "commit.h"
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#include "log-tree.h"
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static struct rev_info log_tree_opt;
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static int diff_tree_commit_sha1(const unsigned char *sha1)
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{
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struct commit *commit = lookup_commit_reference(sha1);
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if (!commit)
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return -1;
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return log_tree_commit(&log_tree_opt, commit);
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}
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static int diff_tree_stdin(char *line)
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{
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int len = strlen(line);
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unsigned char sha1[20];
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struct commit *commit;
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if (!len || line[len-1] != '\n')
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return -1;
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line[len-1] = 0;
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if (get_sha1_hex(line, sha1))
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return -1;
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commit = lookup_commit(sha1);
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if (!commit || parse_commit(commit))
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return -1;
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if (isspace(line[40]) && !get_sha1_hex(line+41, sha1)) {
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/* Graft the fake parents locally to the commit */
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int pos = 41;
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struct commit_list **pptr, *parents;
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/* Free the real parent list */
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for (parents = commit->parents; parents; ) {
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struct commit_list *tmp = parents->next;
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free(parents);
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parents = tmp;
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}
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commit->parents = NULL;
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pptr = &(commit->parents);
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while (line[pos] && !get_sha1_hex(line + pos, sha1)) {
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struct commit *parent = lookup_commit(sha1);
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if (parent) {
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pptr = &commit_list_insert(parent, pptr)->next;
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}
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pos += 41;
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}
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}
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return log_tree_commit(&log_tree_opt, commit);
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}
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static const char diff_tree_usage[] =
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"git-diff-tree [--stdin] [-m] [-c] [--cc] [-s] [-v] [--pretty] [-t] [-r] [--root] "
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"[<common diff options>] <tree-ish> [<tree-ish>] [<path>...]\n"
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" -r diff recursively\n"
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" --root include the initial commit as diff against /dev/null\n"
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COMMON_DIFF_OPTIONS_HELP;
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int main(int argc, const char **argv)
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{
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int nr_sha1;
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char line[1000];
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struct object *tree1, *tree2;
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static struct rev_info *opt = &log_tree_opt;
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struct object_list *list;
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int read_stdin = 0;
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git_config(git_diff_config);
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nr_sha1 = 0;
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init_revisions(opt);
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opt->abbrev = 0;
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opt->diff = 1;
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argc = setup_revisions(argc, argv, opt, NULL);
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while (--argc > 0) {
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const char *arg = *++argv;
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if (!strcmp(arg, "--stdin")) {
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read_stdin = 1;
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continue;
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}
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usage(diff_tree_usage);
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}
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/*
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* NOTE! "setup_revisions()" will have inserted the revisions
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* it parsed in reverse order. So if you do
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*
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* git-diff-tree a b
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*
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* the commit list will be "b" -> "a" -> NULL, so we reverse
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* the order of the objects if the first one is not marked
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* UNINTERESTING.
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*/
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nr_sha1 = 0;
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list = opt->pending_objects;
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if (list) {
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nr_sha1++;
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tree1 = list->item;
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list = list->next;
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if (list) {
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nr_sha1++;
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tree2 = tree1;
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tree1 = list->item;
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if (list->next)
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usage(diff_tree_usage);
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/* Switch them around if the second one was uninteresting.. */
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if (tree2->flags & UNINTERESTING) {
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struct object *tmp = tree2;
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tree2 = tree1;
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tree1 = tmp;
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}
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}
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}
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switch (nr_sha1) {
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case 0:
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if (!read_stdin)
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usage(diff_tree_usage);
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break;
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case 1:
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diff_tree_commit_sha1(tree1->sha1);
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break;
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case 2:
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diff_tree_sha1(tree1->sha1,
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tree2->sha1,
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"", &opt->diffopt);
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log_tree_diff_flush(opt);
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break;
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}
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if (!read_stdin)
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return 0;
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if (opt->diffopt.detect_rename)
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opt->diffopt.setup |= (DIFF_SETUP_USE_SIZE_CACHE |
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DIFF_SETUP_USE_CACHE);
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while (fgets(line, sizeof(line), stdin))
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diff_tree_stdin(line);
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return 0;
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}
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