git/builtin-log.c
Rene Scharfe 2b60356da5 Make git-cherry handle root trees
This patch on top of 'next' makes built-in git-cherry handle root
commits.

It moves the static function log-tree.c::diff_root_tree() to
tree-diff.c and makes it more similar to diff_tree_sha1() by
shuffling around arguments and factoring out the call to
log_tree_diff_flush().  Consequently the name is changed to
diff_root_tree_sha1().  It is a version of diff_tree_sha1() that
compares the empty tree (= root tree) against a single 'real' tree.

This function is then used in get_patch_id() to compute patch IDs
for initial commits instead of SEGFAULTing, as the current code
does if confronted with parentless commits.

Signed-off-by: Rene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: Junio C Hamano <junkio@cox.net>
2006-10-26 18:31:17 -07:00

549 lines
14 KiB
C

/*
* Builtin "git log" and related commands (show, whatchanged)
*
* (C) Copyright 2006 Linus Torvalds
* 2006 Junio Hamano
*/
#include "cache.h"
#include "commit.h"
#include "diff.h"
#include "revision.h"
#include "log-tree.h"
#include "builtin.h"
#include <time.h>
#include <sys/time.h>
/* this is in builtin-diff.c */
void add_head(struct rev_info *revs);
static void cmd_log_init(int argc, const char **argv, const char *prefix,
struct rev_info *rev)
{
rev->abbrev = DEFAULT_ABBREV;
rev->commit_format = CMIT_FMT_DEFAULT;
rev->verbose_header = 1;
argc = setup_revisions(argc, argv, rev, "HEAD");
if (rev->diffopt.pickaxe || rev->diffopt.filter)
rev->always_show_header = 0;
if (argc > 1)
die("unrecognized argument: %s", argv[1]);
}
static int cmd_log_walk(struct rev_info *rev)
{
struct commit *commit;
prepare_revision_walk(rev);
while ((commit = get_revision(rev)) != NULL) {
log_tree_commit(rev, commit);
free(commit->buffer);
commit->buffer = NULL;
free_commit_list(commit->parents);
commit->parents = NULL;
}
return 0;
}
int cmd_whatchanged(int argc, const char **argv, const char *prefix)
{
struct rev_info rev;
git_config(git_diff_ui_config);
init_revisions(&rev, prefix);
rev.diff = 1;
rev.diffopt.recursive = 1;
rev.simplify_history = 0;
cmd_log_init(argc, argv, prefix, &rev);
if (!rev.diffopt.output_format)
rev.diffopt.output_format = DIFF_FORMAT_RAW;
return cmd_log_walk(&rev);
}
int cmd_show(int argc, const char **argv, const char *prefix)
{
struct rev_info rev;
git_config(git_diff_ui_config);
init_revisions(&rev, prefix);
rev.diff = 1;
rev.diffopt.recursive = 1;
rev.combine_merges = 1;
rev.dense_combined_merges = 1;
rev.always_show_header = 1;
rev.ignore_merges = 0;
rev.no_walk = 1;
cmd_log_init(argc, argv, prefix, &rev);
return cmd_log_walk(&rev);
}
int cmd_log(int argc, const char **argv, const char *prefix)
{
struct rev_info rev;
git_config(git_diff_ui_config);
init_revisions(&rev, prefix);
rev.always_show_header = 1;
cmd_log_init(argc, argv, prefix, &rev);
return cmd_log_walk(&rev);
}
static int istitlechar(char c)
{
return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||
(c >= '0' && c <= '9') || c == '.' || c == '_';
}
static char *extra_headers = NULL;
static int extra_headers_size = 0;
static int git_format_config(const char *var, const char *value)
{
if (!strcmp(var, "format.headers")) {
int len = strlen(value);
extra_headers_size += len + 1;
extra_headers = xrealloc(extra_headers, extra_headers_size);
extra_headers[extra_headers_size - len - 1] = 0;
strcat(extra_headers, value);
return 0;
}
if (!strcmp(var, "diff.color")) {
return 0;
}
return git_diff_ui_config(var, value);
}
static FILE *realstdout = NULL;
static const char *output_directory = NULL;
static void reopen_stdout(struct commit *commit, int nr, int keep_subject)
{
char filename[1024];
char *sol;
int len = 0;
if (output_directory) {
strlcpy(filename, output_directory, 1010);
len = strlen(filename);
if (filename[len - 1] != '/')
filename[len++] = '/';
}
sprintf(filename + len, "%04d", nr);
len = strlen(filename);
sol = strstr(commit->buffer, "\n\n");
if (sol) {
int j, space = 1;
sol += 2;
/* strip [PATCH] or [PATCH blabla] */
if (!keep_subject && !strncmp(sol, "[PATCH", 6)) {
char *eos = strchr(sol + 6, ']');
if (eos) {
while (isspace(*eos))
eos++;
sol = eos;
}
}
for (j = 0; len < 1024 - 6 && sol[j] && sol[j] != '\n'; j++) {
if (istitlechar(sol[j])) {
if (space) {
filename[len++] = '-';
space = 0;
}
filename[len++] = sol[j];
if (sol[j] == '.')
while (sol[j + 1] == '.')
j++;
} else
space = 1;
}
while (filename[len - 1] == '.' || filename[len - 1] == '-')
len--;
}
strcpy(filename + len, ".txt");
fprintf(realstdout, "%s\n", filename);
freopen(filename, "w", stdout);
}
static int get_patch_id(struct commit *commit, struct diff_options *options,
unsigned char *sha1)
{
if (commit->parents)
diff_tree_sha1(commit->parents->item->object.sha1,
commit->object.sha1, "", options);
else
diff_root_tree_sha1(commit->object.sha1, "", options);
diffcore_std(options);
return diff_flush_patch_id(options, sha1);
}
static void get_patch_ids(struct rev_info *rev, struct diff_options *options, const char *prefix)
{
struct rev_info check_rev;
struct commit *commit;
struct object *o1, *o2;
unsigned flags1, flags2;
unsigned char sha1[20];
if (rev->pending.nr != 2)
die("Need exactly one range.");
o1 = rev->pending.objects[0].item;
flags1 = o1->flags;
o2 = rev->pending.objects[1].item;
flags2 = o2->flags;
if ((flags1 & UNINTERESTING) == (flags2 & UNINTERESTING))
die("Not a range.");
diff_setup(options);
options->recursive = 1;
if (diff_setup_done(options) < 0)
die("diff_setup_done failed");
/* given a range a..b get all patch ids for b..a */
init_revisions(&check_rev, prefix);
o1->flags ^= UNINTERESTING;
o2->flags ^= UNINTERESTING;
add_pending_object(&check_rev, o1, "o1");
add_pending_object(&check_rev, o2, "o2");
prepare_revision_walk(&check_rev);
while ((commit = get_revision(&check_rev)) != NULL) {
/* ignore merges */
if (commit->parents && commit->parents->next)
continue;
if (!get_patch_id(commit, options, sha1))
created_object(sha1, xcalloc(1, sizeof(struct object)));
}
/* reset for next revision walk */
clear_commit_marks((struct commit *)o1,
SEEN | UNINTERESTING | SHOWN | ADDED);
clear_commit_marks((struct commit *)o2,
SEEN | UNINTERESTING | SHOWN | ADDED);
o1->flags = flags1;
o2->flags = flags2;
}
static void gen_message_id(char *dest, unsigned int length, char *base)
{
const char *committer = git_committer_info(1);
const char *email_start = strrchr(committer, '<');
const char *email_end = strrchr(committer, '>');
if(!email_start || !email_end || email_start > email_end - 1)
die("Could not extract email from committer identity.");
snprintf(dest, length, "%s.%lu.git.%.*s", base,
(unsigned long) time(NULL),
(int)(email_end - email_start - 1), email_start + 1);
}
int cmd_format_patch(int argc, const char **argv, const char *prefix)
{
struct commit *commit;
struct commit **list = NULL;
struct rev_info rev;
int nr = 0, total, i, j;
int use_stdout = 0;
int numbered = 0;
int start_number = -1;
int keep_subject = 0;
int ignore_if_in_upstream = 0;
int thread = 0;
const char *in_reply_to = NULL;
struct diff_options patch_id_opts;
char *add_signoff = NULL;
char message_id[1024];
char ref_message_id[1024];
setup_ident();
git_config(git_format_config);
init_revisions(&rev, prefix);
rev.commit_format = CMIT_FMT_EMAIL;
rev.verbose_header = 1;
rev.diff = 1;
rev.combine_merges = 0;
rev.ignore_merges = 1;
rev.diffopt.msg_sep = "";
rev.diffopt.recursive = 1;
rev.extra_headers = extra_headers;
/*
* Parse the arguments before setup_revisions(), or something
* like "git fmt-patch -o a123 HEAD^.." may fail; a123 is
* possibly a valid SHA1.
*/
for (i = 1, j = 1; i < argc; i++) {
if (!strcmp(argv[i], "--stdout"))
use_stdout = 1;
else if (!strcmp(argv[i], "-n") ||
!strcmp(argv[i], "--numbered"))
numbered = 1;
else if (!strncmp(argv[i], "--start-number=", 15))
start_number = strtol(argv[i] + 15, NULL, 10);
else if (!strcmp(argv[i], "--start-number")) {
i++;
if (i == argc)
die("Need a number for --start-number");
start_number = strtol(argv[i], NULL, 10);
}
else if (!strcmp(argv[i], "-k") ||
!strcmp(argv[i], "--keep-subject")) {
keep_subject = 1;
rev.total = -1;
}
else if (!strcmp(argv[i], "--output-directory") ||
!strcmp(argv[i], "-o")) {
i++;
if (argc <= i)
die("Which directory?");
if (output_directory)
die("Two output directories?");
output_directory = argv[i];
}
else if (!strcmp(argv[i], "--signoff") ||
!strcmp(argv[i], "-s")) {
const char *committer;
const char *endpos;
committer = git_committer_info(1);
endpos = strchr(committer, '>');
if (!endpos)
die("bogos committer info %s\n", committer);
add_signoff = xmalloc(endpos - committer + 2);
memcpy(add_signoff, committer, endpos - committer + 1);
add_signoff[endpos - committer + 1] = 0;
}
else if (!strcmp(argv[i], "--attach"))
rev.mime_boundary = git_version_string;
else if (!strncmp(argv[i], "--attach=", 9))
rev.mime_boundary = argv[i] + 9;
else if (!strcmp(argv[i], "--ignore-if-in-upstream"))
ignore_if_in_upstream = 1;
else if (!strcmp(argv[i], "--thread"))
thread = 1;
else if (!strncmp(argv[i], "--in-reply-to=", 14))
in_reply_to = argv[i] + 14;
else if (!strcmp(argv[i], "--in-reply-to")) {
i++;
if (i == argc)
die("Need a Message-Id for --in-reply-to");
in_reply_to = argv[i];
}
else
argv[j++] = argv[i];
}
argc = j;
if (start_number < 0)
start_number = 1;
if (numbered && keep_subject)
die ("-n and -k are mutually exclusive.");
argc = setup_revisions(argc, argv, &rev, "HEAD");
if (argc > 1)
die ("unrecognized argument: %s", argv[1]);
if (!rev.diffopt.output_format)
rev.diffopt.output_format = DIFF_FORMAT_DIFFSTAT | DIFF_FORMAT_PATCH;
if (!output_directory)
output_directory = prefix;
if (output_directory) {
if (use_stdout)
die("standard output, or directory, which one?");
if (mkdir(output_directory, 0777) < 0 && errno != EEXIST)
die("Could not create directory %s",
output_directory);
}
if (rev.pending.nr == 1) {
rev.pending.objects[0].item->flags |= UNINTERESTING;
add_head(&rev);
}
if (ignore_if_in_upstream)
get_patch_ids(&rev, &patch_id_opts, prefix);
if (!use_stdout)
realstdout = fdopen(dup(1), "w");
prepare_revision_walk(&rev);
while ((commit = get_revision(&rev)) != NULL) {
unsigned char sha1[20];
/* ignore merges */
if (commit->parents && commit->parents->next)
continue;
if (ignore_if_in_upstream &&
!get_patch_id(commit, &patch_id_opts, sha1) &&
lookup_object(sha1))
continue;
nr++;
list = xrealloc(list, nr * sizeof(list[0]));
list[nr - 1] = commit;
}
total = nr;
if (numbered)
rev.total = total + start_number - 1;
rev.add_signoff = add_signoff;
rev.ref_message_id = in_reply_to;
while (0 <= --nr) {
int shown;
commit = list[nr];
rev.nr = total - nr + (start_number - 1);
/* Make the second and subsequent mails replies to the first */
if (thread) {
if (nr == (total - 2)) {
strncpy(ref_message_id, message_id,
sizeof(ref_message_id));
ref_message_id[sizeof(ref_message_id)-1]='\0';
rev.ref_message_id = ref_message_id;
}
gen_message_id(message_id, sizeof(message_id),
sha1_to_hex(commit->object.sha1));
rev.message_id = message_id;
}
if (!use_stdout)
reopen_stdout(commit, rev.nr, keep_subject);
shown = log_tree_commit(&rev, commit);
free(commit->buffer);
commit->buffer = NULL;
/* We put one extra blank line between formatted
* patches and this flag is used by log-tree code
* to see if it needs to emit a LF before showing
* the log; when using one file per patch, we do
* not want the extra blank line.
*/
if (!use_stdout)
rev.shown_one = 0;
if (shown) {
if (rev.mime_boundary)
printf("\n--%s%s--\n\n\n",
mime_boundary_leader,
rev.mime_boundary);
else
printf("-- \n%s\n\n", git_version_string);
}
if (!use_stdout)
fclose(stdout);
}
free(list);
return 0;
}
static int add_pending_commit(const char *arg, struct rev_info *revs, int flags)
{
unsigned char sha1[20];
if (get_sha1(arg, sha1) == 0) {
struct commit *commit = lookup_commit_reference(sha1);
if (commit) {
commit->object.flags |= flags;
add_pending_object(revs, &commit->object, arg);
return 0;
}
}
return -1;
}
static const char cherry_usage[] =
"git-cherry [-v] <upstream> [<head>] [<limit>]";
int cmd_cherry(int argc, const char **argv, const char *prefix)
{
struct rev_info revs;
struct diff_options patch_id_opts;
struct commit *commit;
struct commit_list *list = NULL;
const char *upstream;
const char *head = "HEAD";
const char *limit = NULL;
int verbose = 0;
if (argc > 1 && !strcmp(argv[1], "-v")) {
verbose = 1;
argc--;
argv++;
}
switch (argc) {
case 4:
limit = argv[3];
/* FALLTHROUGH */
case 3:
head = argv[2];
/* FALLTHROUGH */
case 2:
upstream = argv[1];
break;
default:
usage(cherry_usage);
}
init_revisions(&revs, prefix);
revs.diff = 1;
revs.combine_merges = 0;
revs.ignore_merges = 1;
revs.diffopt.recursive = 1;
if (add_pending_commit(head, &revs, 0))
die("Unknown commit %s", head);
if (add_pending_commit(upstream, &revs, UNINTERESTING))
die("Unknown commit %s", upstream);
/* Don't say anything if head and upstream are the same. */
if (revs.pending.nr == 2) {
struct object_array_entry *o = revs.pending.objects;
if (hashcmp(o[0].item->sha1, o[1].item->sha1) == 0)
return 0;
}
get_patch_ids(&revs, &patch_id_opts, prefix);
if (limit && add_pending_commit(limit, &revs, UNINTERESTING))
die("Unknown commit %s", limit);
/* reverse the list of commits */
prepare_revision_walk(&revs);
while ((commit = get_revision(&revs)) != NULL) {
/* ignore merges */
if (commit->parents && commit->parents->next)
continue;
commit_list_insert(commit, &list);
}
while (list) {
unsigned char sha1[20];
char sign = '+';
commit = list->item;
if (!get_patch_id(commit, &patch_id_opts, sha1) &&
lookup_object(sha1))
sign = '-';
if (verbose) {
static char buf[16384];
pretty_print_commit(CMIT_FMT_ONELINE, commit, ~0,
buf, sizeof(buf), 0, NULL, NULL, 0);
printf("%c %s %s\n", sign,
sha1_to_hex(commit->object.sha1), buf);
}
else {
printf("%c %s\n", sign,
sha1_to_hex(commit->object.sha1));
}
list = list->next;
}
return 0;
}