/*

* Builtin "git log" and related commands (show, whatchanged)

*

* (C) Copyright 2006 Linus Torvalds

* 2006 Junio Hamano

*/

#include "cache.h"

#include "color.h"

#include "commit.h"

#include "diff.h"

#include "revision.h"

#include "log-tree.h"

#include "builtin.h"

#include "tag.h"

#include "reflog-walk.h"

#include "patch-ids.h"

#include "refs.h"

#include "run-command.h"

#include "shortlog.h"

/* Set a default date-time format for git log ("log.date" config variable) */

static const char *default_date_mode = NULL;

static int default_show_root = 1;

static const char *fmt_patch_subject_prefix = "PATCH";

static const char *fmt_pretty;

static void add_name_decoration(const char *prefix, const char *name, struct object *obj)

{

int plen = strlen(prefix);

int nlen = strlen(name);

struct name_decoration *res = xmalloc(sizeof(struct name_decoration) + plen + nlen);

memcpy(res->name, prefix, plen);

memcpy(res->name + plen, name, nlen + 1);

res->next = add_decoration(&name_decoration, obj, res);

}

static int add_ref_decoration(const char *refname, const unsigned char *sha1, int flags, void *cb_data)

{

struct object *obj = parse_object(sha1);

if (!obj)

return 0;

add_name_decoration("", refname, obj);

while (obj->type == OBJ_TAG) {

obj = ((struct tag *)obj)->tagged;

if (!obj)

break;

add_name_decoration("tag: ", refname, obj);

}

return 0;

}

static void cmd_log_init(int argc, const char **argv, const char *prefix,

struct rev_info *rev)

{

int i;

int decorate = 0;

rev->abbrev = DEFAULT_ABBREV;

rev->commit_format = CMIT_FMT_DEFAULT;

if (fmt_pretty)

get_commit_format(fmt_pretty, rev);

rev->verbose_header = 1;

DIFF_OPT_SET(&rev->diffopt, RECURSIVE);

rev->show_root_diff = default_show_root;

rev->subject_prefix = fmt_patch_subject_prefix;

if (default_date_mode)

rev->date_mode = parse_date_format(default_date_mode);

argc = setup_revisions(argc, argv, rev, "HEAD");

if (rev->diffopt.pickaxe || rev->diffopt.filter)

rev->always_show_header = 0;

if (DIFF_OPT_TST(&rev->diffopt, FOLLOW_RENAMES)) {

rev->always_show_header = 0;

if (rev->diffopt.nr_paths != 1)

usage("git logs can only follow renames on one pathname at a time");

}

for (i = 1; i < argc; i++) {

const char *arg = argv[i];

if (!strcmp(arg, "--decorate")) {

if (!decorate)

for_each_ref(add_ref_decoration, NULL);

decorate = 1;

} else

die("unrecognized argument: %s", arg);

}

}

/*

* This gives a rough estimate for how many commits we

* will print out in the list.

*/

static int estimate_commit_count(struct rev_info *rev, struct commit_list *list)

{

int n = 0;

while (list) {

struct commit *commit = list->item;

unsigned int flags = commit->object.flags;

list = list->next;

if (!(flags & (TREESAME | UNINTERESTING)))

n++;

}

return n;

}

static void show_early_header(struct rev_info *rev, const char *stage, int nr)

{

if (rev->shown_one) {

rev->shown_one = 0;

if (rev->commit_format != CMIT_FMT_ONELINE)

putchar(rev->diffopt.line_termination);

}

printf("Final output: %d %s\n", nr, stage);

}

struct itimerval early_output_timer;

static void log_show_early(struct rev_info *revs, struct commit_list *list)

{

int i = revs->early_output;

int show_header = 1;

sort_in_topological_order(&list, revs->lifo);

while (list && i) {

struct commit *commit = list->item;

switch (simplify_commit(revs, commit)) {

case commit_show:

if (show_header) {

int n = estimate_commit_count(revs, list);

show_early_header(revs, "incomplete", n);

show_header = 0;

}

log_tree_commit(revs, commit);

i--;

break;

case commit_ignore:

break;

case commit_error:

return;

}

list = list->next;

}

/* Did we already get enough commits for the early output? */

if (!i)

return;

/*

* ..if no, then repeat it twice a second until we

* do.

*

* NOTE! We don't use "it_interval", because if the

* reader isn't listening, we want our output to be

* throttled by the writing, and not have the timer

* trigger every second even if we're blocked on a

* reader!

*/

early_output_timer.it_value.tv_sec = 0;

early_output_timer.it_value.tv_usec = 500000;

setitimer(ITIMER_REAL, &early_output_timer, NULL);

}

static void early_output(int signal)

{

show_early_output = log_show_early;

}

static void setup_early_output(struct rev_info *rev)

{

struct sigaction sa;

/*

* Set up the signal handler, minimally intrusively:

* we only set a single volatile integer word (not

* using sigatomic_t - trying to avoid unnecessary

* system dependencies and headers), and using

* SA_RESTART.

*/

memset(&sa, 0, sizeof(sa));

sa.sa_handler = early_output;

sigemptyset(&sa.sa_mask);

sa.sa_flags = SA_RESTART;

sigaction(SIGALRM, &sa, NULL);

/*

* If we can get the whole output in less than a

* tenth of a second, don't even bother doing the

* early-output thing..

*

* This is a one-time-only trigger.

*/

early_output_timer.it_value.tv_sec = 0;

early_output_timer.it_value.tv_usec = 100000;

setitimer(ITIMER_REAL, &early_output_timer, NULL);

}

static void finish_early_output(struct rev_info *rev)

{

int n = estimate_commit_count(rev, rev->commits);

signal(SIGALRM, SIG_IGN);

show_early_header(rev, "done", n);

}

static int cmd_log_walk(struct rev_info *rev)

{

struct commit *commit;

if (rev->early_output)

setup_early_output(rev);

if (prepare_revision_walk(rev))

die("revision walk setup failed");

if (rev->early_output)

finish_early_output(rev);

while ((commit = get_revision(rev)) != NULL) {

log_tree_commit(rev, commit);

if (!rev->reflog_info) {

/* we allow cycles in reflog ancestry */

free(commit->buffer);

commit->buffer = NULL;

}

free_commit_list(commit->parents);

commit->parents = NULL;

}

return 0;

}

static int git_log_config(const char *var, const char *value, void *cb)

{

if (!strcmp(var, "format.pretty"))

return git_config_string(&fmt_pretty, var, value);

if (!strcmp(var, "format.subjectprefix"))

return git_config_string(&fmt_patch_subject_prefix, var, value);

if (!strcmp(var, "log.date"))

return git_config_string(&default_date_mode, var, value);

if (!strcmp(var, "log.showroot")) {

default_show_root = git_config_bool(var, value);

return 0;

}

return git_diff_ui_config(var, value, cb);

}

int cmd_whatchanged(int argc, const char **argv, const char *prefix)

{

struct rev_info rev;

git_config(git_log_config, NULL);

if (diff_use_color_default == -1)

diff_use_color_default = git_use_color_default;

init_revisions(&rev, prefix);

rev.diff = 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);

}

static void show_tagger(char *buf, int len, struct rev_info *rev)

{

char *email_end, *p;

unsigned long date;

int tz;

email_end = memchr(buf, '>', len);

if (!email_end)

return;

p = ++email_end;

while (isspace(*p))

p++;

date = strtoul(p, &p, 10);

while (isspace(*p))

p++;

tz = (int)strtol(p, NULL, 10);

printf("Tagger: %.*s\nDate: %s\n", (int)(email_end - buf), buf,

show_date(date, tz, rev->date_mode));

}

static int show_object(const unsigned char *sha1, int show_tag_object,

struct rev_info *rev)

{

unsigned long size;

enum object_type type;

char *buf = read_sha1_file(sha1, &type, &size);

int offset = 0;

if (!buf)

return error("Could not read object %s", sha1_to_hex(sha1));

if (show_tag_object)

while (offset < size && buf[offset] != '\n') {

int new_offset = offset + 1;

while (new_offset < size && buf[new_offset++] != '\n')

; /* do nothing */

if (!prefixcmp(buf + offset, "tagger "))

show_tagger(buf + offset + 7,

new_offset - offset - 7, rev);

offset = new_offset;

}

if (offset < size)

fwrite(buf + offset, size - offset, 1, stdout);

free(buf);

return 0;

}

static int show_tree_object(const unsigned char *sha1,

const char *base, int baselen,

const char *pathname, unsigned mode, int stage)

{

printf("%s%s\n", pathname, S_ISDIR(mode) ? "/" : "");

return 0;

}

int cmd_show(int argc, const char **argv, const char *prefix)

{

struct rev_info rev;

struct object_array_entry *objects;

int i, count, ret = 0;

git_config(git_log_config, NULL);

if (diff_use_color_default == -1)

diff_use_color_default = git_use_color_default;

init_revisions(&rev, prefix);

rev.diff = 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);

count = rev.pending.nr;

objects = rev.pending.objects;

for (i = 0; i < count && !ret; i++) {

struct object *o = objects[i].item;

const char *name = objects[i].name;

switch (o->type) {

case OBJ_BLOB:

ret = show_object(o->sha1, 0, NULL);

break;

case OBJ_TAG: {

struct tag *t = (struct tag *)o;

printf("%stag %s%s\n",

diff_get_color_opt(&rev.diffopt, DIFF_COMMIT),

t->tag,

diff_get_color_opt(&rev.diffopt, DIFF_RESET));

ret = show_object(o->sha1, 1, &rev);

objects[i].item = parse_object(t->tagged->sha1);

i--;

break;

}

case OBJ_TREE:

printf("%stree %s%s\n\n",

diff_get_color_opt(&rev.diffopt, DIFF_COMMIT),

name,

diff_get_color_opt(&rev.diffopt, DIFF_RESET));

read_tree_recursive((struct tree *)o, "", 0, 0, NULL,

show_tree_object);

break;

case OBJ_COMMIT:

rev.pending.nr = rev.pending.alloc = 0;

rev.pending.objects = NULL;

add_object_array(o, name, &rev.pending);

ret = cmd_log_walk(&rev);

break;

default:

ret = error("Unknown type: %d", o->type);

}

}

free(objects);

return ret;

}

/*

* This is equivalent to "git log -g --abbrev-commit --pretty=oneline"

*/

int cmd_log_reflog(int argc, const char **argv, const char *prefix)

{

struct rev_info rev;

git_config(git_log_config, NULL);

if (diff_use_color_default == -1)

diff_use_color_default = git_use_color_default;

init_revisions(&rev, prefix);

init_reflog_walk(&rev.reflog_info);

rev.abbrev_commit = 1;

rev.verbose_header = 1;

cmd_log_init(argc, argv, prefix, &rev);

/*

* This means that we override whatever commit format the user gave

* on the cmd line. Sad, but cmd_log_init() currently doesn't

* allow us to set a different default.

*/

rev.commit_format = CMIT_FMT_ONELINE;

rev.use_terminator = 1;

rev.always_show_header = 1;

/*

* We get called through "git reflog", so unlike the other log

* routines, we need to set up our pager manually..

*/

setup_pager();

return cmd_log_walk(&rev);

}

int cmd_log(int argc, const char **argv, const char *prefix)

{

struct rev_info rev;

git_config(git_log_config, NULL);

if (diff_use_color_default == -1)

diff_use_color_default = git_use_color_default;

init_revisions(&rev, prefix);

rev.always_show_header = 1;

cmd_log_init(argc, argv, prefix, &rev);

return cmd_log_walk(&rev);

}

/* format-patch */

#define FORMAT_PATCH_NAME_MAX 64

static int istitlechar(char c)

{

return (c >= 'a' && c <= 'z') || (c >= 'A' && c <= 'Z') ||

(c >= '0' && c <= '9') || c == '.' || c == '_';

}

static const char *fmt_patch_suffix = ".patch";

static int numbered = 0;

static int auto_number = 0;

static char **extra_hdr;

static int extra_hdr_nr;

static int extra_hdr_alloc;

static char **extra_to;

static int extra_to_nr;

static int extra_to_alloc;

static char **extra_cc;

static int extra_cc_nr;

static int extra_cc_alloc;

static void add_header(const char *value)

{

int len = strlen(value);

while (value[len - 1] == '\n')

len--;

if (!strncasecmp(value, "to: ", 4)) {

ALLOC_GROW(extra_to, extra_to_nr + 1, extra_to_alloc);

extra_to[extra_to_nr++] = xstrndup(value + 4, len - 4);

return;

}

if (!strncasecmp(value, "cc: ", 4)) {

ALLOC_GROW(extra_cc, extra_cc_nr + 1, extra_cc_alloc);

extra_cc[extra_cc_nr++] = xstrndup(value + 4, len - 4);

return;

}

ALLOC_GROW(extra_hdr, extra_hdr_nr + 1, extra_hdr_alloc);

extra_hdr[extra_hdr_nr++] = xstrndup(value, len);

}

static int git_format_config(const char *var, const char *value, void *cb)

{

if (!strcmp(var, "format.headers")) {

if (!value)

die("format.headers without value");

add_header(value);

return 0;

}

if (!strcmp(var, "format.suffix"))

return git_config_string(&fmt_patch_suffix, var, value);

if (!strcmp(var, "format.cc")) {

if (!value)

return config_error_nonbool(var);

ALLOC_GROW(extra_cc, extra_cc_nr + 1, extra_cc_alloc);

extra_cc[extra_cc_nr++] = xstrdup(value);

return 0;

}

if (!strcmp(var, "diff.color") || !strcmp(var, "color.diff")) {

return 0;

}

if (!strcmp(var, "format.numbered")) {

if (value && !strcasecmp(value, "auto")) {

auto_number = 1;

return 0;

}

numbered = git_config_bool(var, value);

return 0;

}

return git_log_config(var, value, cb);

}

static const char *get_oneline_for_filename(struct commit *commit,

int keep_subject)

{

static char filename[PATH_MAX];

char *sol;

int len = 0;

int suffix_len = strlen(fmt_patch_suffix) + 1;

sol = strstr(commit->buffer, "\n\n");

if (!sol)

filename[0] = '\0';

else {

int j, space = 0;

sol += 2;

/* strip [PATCH] or [PATCH blabla] */

if (!keep_subject && !prefixcmp(sol, "[PATCH")) {

char *eos = strchr(sol + 6, ']');

if (eos) {

while (isspace(*eos))

eos++;

sol = eos;

}

}

for (j = 0;

j < FORMAT_PATCH_NAME_MAX - suffix_len - 5 &&

len < sizeof(filename) - suffix_len &&

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--;

filename[len] = '\0';

}

return filename;

}

static FILE *realstdout = NULL;

static const char *output_directory = NULL;

static int reopen_stdout(const char *oneline, int nr, int total)

{

char filename[PATH_MAX];

int len = 0;

int suffix_len = strlen(fmt_patch_suffix) + 1;

if (output_directory) {

len = snprintf(filename, sizeof(filename), "%s",

output_directory);

if (len >=

sizeof(filename) - FORMAT_PATCH_NAME_MAX - suffix_len)

return error("name of output directory is too long");

if (filename[len - 1] != '/')

filename[len++] = '/';

}

if (!oneline)

len += sprintf(filename + len, "%d", nr);

else {

len += sprintf(filename + len, "%04d-", nr);

len += snprintf(filename + len, sizeof(filename) - len - 1

- suffix_len, "%s", oneline);

strcpy(filename + len, fmt_patch_suffix);

}

fprintf(realstdout, "%s\n", filename);

if (freopen(filename, "w", stdout) == NULL)

return error("Cannot open patch file %s",filename);

return 0;

}

static void get_patch_ids(struct rev_info *rev, struct patch_ids *ids, const char *prefix)

{

struct rev_info check_rev;

struct commit *commit;

struct object *o1, *o2;

unsigned flags1, flags2;

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.");

init_patch_ids(ids);

/* 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");

if (prepare_revision_walk(&check_rev))

die("revision walk setup failed");

while ((commit = get_revision(&check_rev)) != NULL) {

/* ignore merges */

if (commit->parents && commit->parents->next)

continue;

add_commit_patch_id(commit, ids);

}

/* 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(struct rev_info *info, char *base)

{

const char *committer = git_committer_info(IDENT_WARN_ON_NO_NAME);

const char *email_start = strrchr(committer, '<');

const char *email_end = strrchr(committer, '>');

struct strbuf buf;

if (!email_start || !email_end || email_start > email_end - 1)

die("Could not extract email from committer identity.");

strbuf_init(&buf, 0);

strbuf_addf(&buf, "%s.%lu.git.%.*s", base,

(unsigned long) time(NULL),

(int)(email_end - email_start - 1), email_start + 1);

info->message_id = strbuf_detach(&buf, NULL);

}

static void make_cover_letter(struct rev_info *rev, int use_stdout,

int numbered, int numbered_files,

struct commit *origin,

int nr, struct commit **list, struct commit *head)

{

const char *committer;

char *head_sha1;

const char *subject_start = NULL;

const char *body = "*** SUBJECT HERE ***\n\n*** BLURB HERE ***\n";

const char *msg;

const char *extra_headers = rev->extra_headers;

struct shortlog log;

struct strbuf sb;

int i;

const char *encoding = "utf-8";

struct diff_options opts;

int need_8bit_cte = 0;

if (rev->commit_format != CMIT_FMT_EMAIL)

die("Cover letter needs email format");

if (!use_stdout && reopen_stdout(numbered_files ?

NULL : "cover-letter", 0, rev->total))

return;

head_sha1 = sha1_to_hex(head->object.sha1);

log_write_email_headers(rev, head_sha1, &subject_start, &extra_headers,

&need_8bit_cte);

committer = git_committer_info(0);

msg = body;

strbuf_init(&sb, 0);

pp_user_info(NULL, CMIT_FMT_EMAIL, &sb, committer, DATE_RFC2822,

encoding);

pp_title_line(CMIT_FMT_EMAIL, &msg, &sb, subject_start, extra_headers,

encoding, need_8bit_cte);

pp_remainder(CMIT_FMT_EMAIL, &msg, &sb, 0);

printf("%s\n", sb.buf);

strbuf_release(&sb);

shortlog_init(&log);

log.wrap_lines = 1;

log.wrap = 72;

log.in1 = 2;

log.in2 = 4;

for (i = 0; i < nr; i++)

shortlog_add_commit(&log, list[i]);

shortlog_output(&log);

/*

* We can only do diffstat with a unique reference point

*/

if (!origin)

return;

memcpy(&opts, &rev->diffopt, sizeof(opts));

opts.output_format = DIFF_FORMAT_SUMMARY | DIFF_FORMAT_DIFFSTAT;

diff_setup_done(&opts);

diff_tree_sha1(origin->tree->object.sha1,

head->tree->object.sha1,

"", &opts);

diffcore_std(&opts);

diff_flush(&opts);

printf("\n");

}

static const char *clean_message_id(const char *msg_id)

{

char ch;

const char *a, *z, *m;

m = msg_id;

while ((ch = *m) && (isspace(ch) || (ch == '<')))

m++;

a = m;

z = NULL;

while ((ch = *m)) {

if (!isspace(ch) && (ch != '>'))

z = m;

m++;

}

if (!z)

die("insane in-reply-to: %s", msg_id);

if (++z == m)

return a;

return xmemdupz(a, z - a);

}

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 start_number = -1;

int keep_subject = 0;

int numbered_files = 0; /* _just_ numbers */

int subject_prefix = 0;

int ignore_if_in_upstream = 0;

int thread = 0;

int cover_letter = 0;

int boundary_count = 0;

int no_binary_diff = 0;

struct commit *origin = NULL, *head = NULL;

const char *in_reply_to = NULL;

struct patch_ids ids;

char *add_signoff = NULL;

struct strbuf buf;

git_config(git_format_config, NULL);

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;

DIFF_OPT_SET(&rev.diffopt, RECURSIVE);

rev.subject_prefix = fmt_patch_subject_prefix;

/*

* Parse the arguments before setup_revisions(), or something

* like "git format-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 (!strcmp(argv[i], "-N") ||

!strcmp(argv[i], "--no-numbered")) {

numbered = 0;

auto_number = 0;

}

else if (!prefixcmp(argv[i], "--start-number="))

start_number = strtol(argv[i] + 15, NULL, 10);

else if (!strcmp(argv[i], "--numbered-files"))

numbered_files = 1;

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 (!prefixcmp(argv[i], "--cc=")) {

ALLOC_GROW(extra_cc, extra_cc_nr + 1, extra_cc_alloc);

extra_cc[extra_cc_nr++] = xstrdup(argv[i] + 5);

}

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(IDENT_ERROR_ON_NO_NAME);

endpos = strchr(committer, '>');

if (!endpos)

die("bogos committer info %s\n", committer);

add_signoff = xmemdupz(committer, endpos - committer + 1);

}

else if (!strcmp(argv[i], "--attach")) {

rev.mime_boundary = git_version_string;

rev.no_inline = 1;

}

else if (!prefixcmp(argv[i], "--attach=")) {

rev.mime_boundary = argv[i] + 9;

rev.no_inline = 1;

}

else if (!strcmp(argv[i], "--inline")) {

rev.mime_boundary = git_version_string;

rev.no_inline = 0;

}

else if (!prefixcmp(argv[i], "--inline=")) {

rev.mime_boundary = argv[i] + 9;

rev.no_inline = 0;

}

else if (!strcmp(argv[i], "--ignore-if-in-upstream"))

ignore_if_in_upstream = 1;

else if (!strcmp(argv[i], "--thread"))

thread = 1;

else if (!prefixcmp(argv[i], "--in-reply-to="))

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 if (!prefixcmp(argv[i], "--subject-prefix=")) {

subject_prefix = 1;

rev.subject_prefix = argv[i] + 17;

} else if (!prefixcmp(argv[i], "--suffix="))

fmt_patch_suffix = argv[i] + 9;

else if (!strcmp(argv[i], "--cover-letter"))

cover_letter = 1;

else if (!strcmp(argv[i], "--no-binary"))

no_binary_diff = 1;

else

argv[j++] = argv[i];

}

argc = j;

strbuf_init(&buf, 0);

for (i = 0; i < extra_hdr_nr; i++) {

strbuf_addstr(&buf, extra_hdr[i]);

strbuf_addch(&buf, '\n');

}

if (extra_to_nr)

strbuf_addstr(&buf, "To: ");

for (i = 0; i < extra_to_nr; i++) {

if (i)

strbuf_addstr(&buf, " ");

strbuf_addstr(&buf, extra_to[i]);

if (i + 1 < extra_to_nr)

strbuf_addch(&buf, ',');

strbuf_addch(&buf, '\n');

}

if (extra_cc_nr)

strbuf_addstr(&buf, "Cc: ");

for (i = 0; i < extra_cc_nr; i++) {

if (i)

strbuf_addstr(&buf, " ");

strbuf_addstr(&buf, extra_cc[i]);

if (i + 1 < extra_cc_nr)

strbuf_addch(&buf, ',');

strbuf_addch(&buf, '\n');

}

rev.extra_headers = strbuf_detach(&buf, 0);

if (start_number < 0)

start_number = 1;

if (numbered && keep_subject)

die ("-n and -k are mutually exclusive.");

if (keep_subject && subject_prefix)

die ("--subject-prefix and -k are mutually exclusive.");

if (numbered_files && use_stdout)

die ("--numbered-files and --stdout 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_SUMMARY | DIFF_FORMAT_PATCH;

if (!DIFF_OPT_TST(&rev.diffopt, TEXT) && !no_binary_diff)

DIFF_OPT_SET(&rev.diffopt, BINARY);

if (!output_directory && !use_stdout)

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) {

if (rev.max_count < 0 && !rev.show_root_diff) {

/*

* This is traditional behaviour of "git format-patch

* origin" that prepares what the origin side still

* does not have.

*/

rev.pending.objects[0].item->flags |= UNINTERESTING;

add_head_to_pending(&rev);

}

/*

* Otherwise, it is "format-patch -22 HEAD", and/or

* "format-patch --root HEAD". The user wants

* get_revision() to do the usual traversal.

*/

}

if (cover_letter) {

/* remember the range */

int i;

for (i = 0; i < rev.pending.nr; i++) {

struct object *o = rev.pending.objects[i].item;

if (!(o->flags & UNINTERESTING))

head = (struct commit *)o;

}

/* We can't generate a cover letter without any patches */

if (!head)

return 0;

}

if (ignore_if_in_upstream)

get_patch_ids(&rev, &ids, prefix);

if (!use_stdout)

realstdout = xfdopen(xdup(1), "w");

if (prepare_revision_walk(&rev))

die("revision walk setup failed");

rev.boundary = 1;

while ((commit = get_revision(&rev)) != NULL) {

if (commit->object.flags & BOUNDARY) {

boundary_count++;

origin = (boundary_count == 1) ? commit : NULL;

continue;

}

/* ignore merges */

if (commit->parents && commit->parents->next)

continue;

if (ignore_if_in_upstream &&

has_commit_patch_id(commit, &ids))

continue;

nr++;

list = xrealloc(list, nr * sizeof(list[0]));

list[nr - 1] = commit;

}

total = nr;