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#include "cache.h"
#include "diff.h"
#include "commit.h"
#include "log-tree.h"
static struct log_tree_opt log_tree_opt;
static int diff_tree_commit_sha1(const unsigned char *sha1)
{
struct commit *commit = lookup_commit_reference(sha1);
if (!commit)
return -1;
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;
if (isspace(line[40]) && !get_sha1_hex(line+41, sha1)) {
/* Graft the fake parents locally to the commit */
int pos = 41;
struct commit_list **pptr, *parents;
/* Free the real parent list */
for (parents = commit->parents; parents; ) {
struct commit_list *tmp = parents->next;
free(parents);
parents = tmp;
}
commit->parents = NULL;
pptr = &(commit->parents);
while (line[pos] && !get_sha1_hex(line + pos, sha1)) {
struct commit *parent = lookup_commit(sha1);
if (parent) {
pptr = &commit_list_insert(parent, pptr)->next;
}
pos += 41;
}
}
return log_tree_commit(&log_tree_opt, commit);
}
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"
" -r diff recursively\n"
" --root include the initial commit as diff against /dev/null\n"
COMMON_DIFF_OPTIONS_HELP;
int main(int argc, const char **argv)
{
int nr_sha1;
char line[1000];
unsigned char sha1[2][20];
const char *prefix = setup_git_directory();
static struct log_tree_opt *opt = &log_tree_opt;
int read_stdin = 0;
git_config(git_diff_config);
nr_sha1 = 0;
init_log_tree_opt(opt);
for (;;) {
int opt_cnt;
const char *arg;
argv++;
argc--;
arg = *argv;
if (!arg)
break;
if (*arg != '-') {
if (nr_sha1 < 2 && !get_sha1(arg, sha1[nr_sha1])) {
nr_sha1++;
continue;
}
break;
}
opt_cnt = log_tree_opt_parse(opt, argv, argc);
if (opt_cnt < 0)
usage(diff_tree_usage);
else if (opt_cnt) {
argv += opt_cnt - 1;
argc -= opt_cnt - 1;
continue;
}
if (!strcmp(arg, "--")) {
argv++;
argc--;
break;
}
if (!strcmp(arg, "--stdin")) {
read_stdin = 1;
continue;
}
usage(diff_tree_usage);
}
if (opt->combine_merges)
opt->ignore_merges = 0;
/* We can only do dense combined merges with diff output */
if (opt->dense_combined_merges)
opt->diffopt.output_format = DIFF_FORMAT_PATCH;
diff_tree_setup_paths(get_pathspec(prefix, argv), &opt->diffopt);
diff_setup_done(&opt->diffopt);
switch (nr_sha1) {
case 0:
if (!read_stdin)
usage(diff_tree_usage);
break;
case 1:
diff_tree_commit_sha1(sha1[0]);
break;
case 2:
diff_tree_sha1(sha1[0], sha1[1], "", &opt->diffopt);
log_tree_diff_flush(opt);
break;
}
if (!read_stdin)
return 0;
if (opt->diffopt.detect_rename)
opt->diffopt.setup |= (DIFF_SETUP_USE_SIZE_CACHE |
DIFF_SETUP_USE_CACHE);
while (fgets(line, sizeof(line), stdin))
diff_tree_stdin(line);
return 0;
}
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