git/submodule.c

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16 KiB
C
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#include "cache.h"
#include "submodule.h"
#include "dir.h"
#include "diff.h"
#include "commit.h"
#include "revision.h"
#include "run-command.h"
#include "diffcore.h"
#include "refs.h"
Submodules: Add the new "ignore" config option for diff and status The new "ignore" config option controls the default behavior for "git status" and the diff family. It specifies under what circumstances they consider submodules as modified and can be set separately for each submodule. The command line option "--ignore-submodules=" has been extended to accept the new parameter "none" for both status and diff. Users that chose submodules to get rid of long work tree scanning times might want to set the "dirty" option for those submodules. This brings back the pre 1.7.0 behavior, where submodule work trees were never scanned for modifications. By using "--ignore-submodules=none" on the command line the status and diff commands can be told to do a full scan. This option can be set to the following values (which have the same name and meaning as for the "--ignore-submodules" option of status and diff): "all": All changes to the submodule will be ignored. "dirty": Only differences of the commit recorded in the superproject and the submodules HEAD will be considered modifications, all changes to the work tree of the submodule will be ignored. When using this value, the submodule will not be scanned for work tree changes at all, leading to a performance benefit on large submodules. "untracked": Only untracked files in the submodules work tree are ignored, a changed HEAD and/or modified files in the submodule will mark it as modified. "none" (which is the default): Either untracked or modified files in a submodules work tree or a difference between the subdmodules HEAD and the commit recorded in the superproject will make it show up as changed. This value is added as a new parameter for the "--ignore-submodules" option of the diff family and "git status" so the user can override the settings in the configuration. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-08-05 22:39:25 +00:00
#include "string-list.h"
struct string_list config_name_for_path;
struct string_list config_fetch_recurse_submodules_for_name;
Submodules: Add the new "ignore" config option for diff and status The new "ignore" config option controls the default behavior for "git status" and the diff family. It specifies under what circumstances they consider submodules as modified and can be set separately for each submodule. The command line option "--ignore-submodules=" has been extended to accept the new parameter "none" for both status and diff. Users that chose submodules to get rid of long work tree scanning times might want to set the "dirty" option for those submodules. This brings back the pre 1.7.0 behavior, where submodule work trees were never scanned for modifications. By using "--ignore-submodules=none" on the command line the status and diff commands can be told to do a full scan. This option can be set to the following values (which have the same name and meaning as for the "--ignore-submodules" option of status and diff): "all": All changes to the submodule will be ignored. "dirty": Only differences of the commit recorded in the superproject and the submodules HEAD will be considered modifications, all changes to the work tree of the submodule will be ignored. When using this value, the submodule will not be scanned for work tree changes at all, leading to a performance benefit on large submodules. "untracked": Only untracked files in the submodules work tree are ignored, a changed HEAD and/or modified files in the submodule will mark it as modified. "none" (which is the default): Either untracked or modified files in a submodules work tree or a difference between the subdmodules HEAD and the commit recorded in the superproject will make it show up as changed. This value is added as a new parameter for the "--ignore-submodules" option of the diff family and "git status" so the user can override the settings in the configuration. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-08-05 22:39:25 +00:00
struct string_list config_ignore_for_name;
static int config_fetch_recurse_submodules;
static int add_submodule_odb(const char *path)
{
struct strbuf objects_directory = STRBUF_INIT;
struct alternate_object_database *alt_odb;
int ret = 0;
const char *git_dir;
strbuf_addf(&objects_directory, "%s/.git", path);
git_dir = read_gitfile_gently(objects_directory.buf);
if (git_dir) {
strbuf_reset(&objects_directory);
strbuf_addstr(&objects_directory, git_dir);
}
strbuf_addstr(&objects_directory, "/objects/");
if (!is_directory(objects_directory.buf)) {
ret = -1;
goto done;
}
/* avoid adding it twice */
for (alt_odb = alt_odb_list; alt_odb; alt_odb = alt_odb->next)
if (alt_odb->name - alt_odb->base == objects_directory.len &&
!strncmp(alt_odb->base, objects_directory.buf,
objects_directory.len))
goto done;
alt_odb = xmalloc(objects_directory.len + 42 + sizeof(*alt_odb));
alt_odb->next = alt_odb_list;
strcpy(alt_odb->base, objects_directory.buf);
alt_odb->name = alt_odb->base + objects_directory.len;
alt_odb->name[2] = '/';
alt_odb->name[40] = '\0';
alt_odb->name[41] = '\0';
alt_odb_list = alt_odb;
prepare_alt_odb();
done:
strbuf_release(&objects_directory);
return ret;
}
Submodules: Add the new "ignore" config option for diff and status The new "ignore" config option controls the default behavior for "git status" and the diff family. It specifies under what circumstances they consider submodules as modified and can be set separately for each submodule. The command line option "--ignore-submodules=" has been extended to accept the new parameter "none" for both status and diff. Users that chose submodules to get rid of long work tree scanning times might want to set the "dirty" option for those submodules. This brings back the pre 1.7.0 behavior, where submodule work trees were never scanned for modifications. By using "--ignore-submodules=none" on the command line the status and diff commands can be told to do a full scan. This option can be set to the following values (which have the same name and meaning as for the "--ignore-submodules" option of status and diff): "all": All changes to the submodule will be ignored. "dirty": Only differences of the commit recorded in the superproject and the submodules HEAD will be considered modifications, all changes to the work tree of the submodule will be ignored. When using this value, the submodule will not be scanned for work tree changes at all, leading to a performance benefit on large submodules. "untracked": Only untracked files in the submodules work tree are ignored, a changed HEAD and/or modified files in the submodule will mark it as modified. "none" (which is the default): Either untracked or modified files in a submodules work tree or a difference between the subdmodules HEAD and the commit recorded in the superproject will make it show up as changed. This value is added as a new parameter for the "--ignore-submodules" option of the diff family and "git status" so the user can override the settings in the configuration. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-08-05 22:39:25 +00:00
void set_diffopt_flags_from_submodule_config(struct diff_options *diffopt,
const char *path)
{
struct string_list_item *path_option, *ignore_option;
path_option = unsorted_string_list_lookup(&config_name_for_path, path);
if (path_option) {
ignore_option = unsorted_string_list_lookup(&config_ignore_for_name, path_option->util);
if (ignore_option)
handle_ignore_submodules_arg(diffopt, ignore_option->util);
}
}
int submodule_config(const char *var, const char *value, void *cb)
{
if (!prefixcmp(var, "submodule."))
return parse_submodule_config_option(var, value);
else if (!strcmp(var, "fetch.recursesubmodules")) {
config_fetch_recurse_submodules = git_config_bool(var, value);
return 0;
}
return 0;
}
void gitmodules_config(void)
{
const char *work_tree = get_git_work_tree();
if (work_tree) {
struct strbuf gitmodules_path = STRBUF_INIT;
strbuf_addstr(&gitmodules_path, work_tree);
strbuf_addstr(&gitmodules_path, "/.gitmodules");
git_config_from_file(submodule_config, gitmodules_path.buf, NULL);
strbuf_release(&gitmodules_path);
}
}
Submodules: Add the new "ignore" config option for diff and status The new "ignore" config option controls the default behavior for "git status" and the diff family. It specifies under what circumstances they consider submodules as modified and can be set separately for each submodule. The command line option "--ignore-submodules=" has been extended to accept the new parameter "none" for both status and diff. Users that chose submodules to get rid of long work tree scanning times might want to set the "dirty" option for those submodules. This brings back the pre 1.7.0 behavior, where submodule work trees were never scanned for modifications. By using "--ignore-submodules=none" on the command line the status and diff commands can be told to do a full scan. This option can be set to the following values (which have the same name and meaning as for the "--ignore-submodules" option of status and diff): "all": All changes to the submodule will be ignored. "dirty": Only differences of the commit recorded in the superproject and the submodules HEAD will be considered modifications, all changes to the work tree of the submodule will be ignored. When using this value, the submodule will not be scanned for work tree changes at all, leading to a performance benefit on large submodules. "untracked": Only untracked files in the submodules work tree are ignored, a changed HEAD and/or modified files in the submodule will mark it as modified. "none" (which is the default): Either untracked or modified files in a submodules work tree or a difference between the subdmodules HEAD and the commit recorded in the superproject will make it show up as changed. This value is added as a new parameter for the "--ignore-submodules" option of the diff family and "git status" so the user can override the settings in the configuration. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-08-05 22:39:25 +00:00
int parse_submodule_config_option(const char *var, const char *value)
{
int len;
struct string_list_item *config;
struct strbuf submodname = STRBUF_INIT;
var += 10; /* Skip "submodule." */
len = strlen(var);
if ((len > 5) && !strcmp(var + len - 5, ".path")) {
strbuf_add(&submodname, var, len - 5);
config = unsorted_string_list_lookup(&config_name_for_path, value);
if (config)
free(config->util);
else
config = string_list_append(&config_name_for_path, xstrdup(value));
config->util = strbuf_detach(&submodname, NULL);
strbuf_release(&submodname);
} else if ((len > 23) && !strcmp(var + len - 23, ".fetchrecursesubmodules")) {
strbuf_add(&submodname, var, len - 23);
config = unsorted_string_list_lookup(&config_fetch_recurse_submodules_for_name, submodname.buf);
if (!config)
config = string_list_append(&config_fetch_recurse_submodules_for_name,
strbuf_detach(&submodname, NULL));
config->util = git_config_bool(var, value) ? (void *)1 : NULL;
strbuf_release(&submodname);
Submodules: Add the new "ignore" config option for diff and status The new "ignore" config option controls the default behavior for "git status" and the diff family. It specifies under what circumstances they consider submodules as modified and can be set separately for each submodule. The command line option "--ignore-submodules=" has been extended to accept the new parameter "none" for both status and diff. Users that chose submodules to get rid of long work tree scanning times might want to set the "dirty" option for those submodules. This brings back the pre 1.7.0 behavior, where submodule work trees were never scanned for modifications. By using "--ignore-submodules=none" on the command line the status and diff commands can be told to do a full scan. This option can be set to the following values (which have the same name and meaning as for the "--ignore-submodules" option of status and diff): "all": All changes to the submodule will be ignored. "dirty": Only differences of the commit recorded in the superproject and the submodules HEAD will be considered modifications, all changes to the work tree of the submodule will be ignored. When using this value, the submodule will not be scanned for work tree changes at all, leading to a performance benefit on large submodules. "untracked": Only untracked files in the submodules work tree are ignored, a changed HEAD and/or modified files in the submodule will mark it as modified. "none" (which is the default): Either untracked or modified files in a submodules work tree or a difference between the subdmodules HEAD and the commit recorded in the superproject will make it show up as changed. This value is added as a new parameter for the "--ignore-submodules" option of the diff family and "git status" so the user can override the settings in the configuration. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-08-05 22:39:25 +00:00
} else if ((len > 7) && !strcmp(var + len - 7, ".ignore")) {
if (strcmp(value, "untracked") && strcmp(value, "dirty") &&
strcmp(value, "all") && strcmp(value, "none")) {
warning("Invalid parameter \"%s\" for config option \"submodule.%s.ignore\"", value, var);
return 0;
}
strbuf_add(&submodname, var, len - 7);
config = unsorted_string_list_lookup(&config_ignore_for_name, submodname.buf);
if (config)
free(config->util);
else
config = string_list_append(&config_ignore_for_name,
strbuf_detach(&submodname, NULL));
strbuf_release(&submodname);
config->util = xstrdup(value);
return 0;
}
return 0;
}
Add the option "--ignore-submodules" to "git status" In some use cases it is not desirable that "git status" considers submodules that only contain untracked content as dirty. This may happen e.g. when the submodule is not under the developers control and not all build generated files have been added to .gitignore by the upstream developers. Using the "untracked" parameter for the "--ignore-submodules" option disables checking for untracked content and lets git diff report them as changed only when they have new commits or modified content. Sometimes it is not wanted to have submodules show up as changed when they just contain changes to their work tree (this was the behavior before 1.7.0). An example for that are scripts which just want to check for submodule commits while ignoring any changes to the work tree. Also users having large submodules known not to change might want to use this option, as the - sometimes substantial - time it takes to scan the submodule work tree(s) is saved when using the "dirty" parameter. And if you want to ignore any changes to submodules, you can now do that by using this option without parameters or with "all" (when the config option status.submodulesummary is set, using "all" will also suppress the output of the submodule summary). A new function handle_ignore_submodules_arg() is introduced to parse this option new to "git status" in a single location, as "git diff" already knew it. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-06-25 14:56:47 +00:00
void handle_ignore_submodules_arg(struct diff_options *diffopt,
const char *arg)
{
DIFF_OPT_CLR(diffopt, IGNORE_SUBMODULES);
DIFF_OPT_CLR(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
DIFF_OPT_CLR(diffopt, IGNORE_DIRTY_SUBMODULES);
Add the option "--ignore-submodules" to "git status" In some use cases it is not desirable that "git status" considers submodules that only contain untracked content as dirty. This may happen e.g. when the submodule is not under the developers control and not all build generated files have been added to .gitignore by the upstream developers. Using the "untracked" parameter for the "--ignore-submodules" option disables checking for untracked content and lets git diff report them as changed only when they have new commits or modified content. Sometimes it is not wanted to have submodules show up as changed when they just contain changes to their work tree (this was the behavior before 1.7.0). An example for that are scripts which just want to check for submodule commits while ignoring any changes to the work tree. Also users having large submodules known not to change might want to use this option, as the - sometimes substantial - time it takes to scan the submodule work tree(s) is saved when using the "dirty" parameter. And if you want to ignore any changes to submodules, you can now do that by using this option without parameters or with "all" (when the config option status.submodulesummary is set, using "all" will also suppress the output of the submodule summary). A new function handle_ignore_submodules_arg() is introduced to parse this option new to "git status" in a single location, as "git diff" already knew it. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-06-25 14:56:47 +00:00
if (!strcmp(arg, "all"))
DIFF_OPT_SET(diffopt, IGNORE_SUBMODULES);
else if (!strcmp(arg, "untracked"))
DIFF_OPT_SET(diffopt, IGNORE_UNTRACKED_IN_SUBMODULES);
else if (!strcmp(arg, "dirty"))
DIFF_OPT_SET(diffopt, IGNORE_DIRTY_SUBMODULES);
Submodules: Add the new "ignore" config option for diff and status The new "ignore" config option controls the default behavior for "git status" and the diff family. It specifies under what circumstances they consider submodules as modified and can be set separately for each submodule. The command line option "--ignore-submodules=" has been extended to accept the new parameter "none" for both status and diff. Users that chose submodules to get rid of long work tree scanning times might want to set the "dirty" option for those submodules. This brings back the pre 1.7.0 behavior, where submodule work trees were never scanned for modifications. By using "--ignore-submodules=none" on the command line the status and diff commands can be told to do a full scan. This option can be set to the following values (which have the same name and meaning as for the "--ignore-submodules" option of status and diff): "all": All changes to the submodule will be ignored. "dirty": Only differences of the commit recorded in the superproject and the submodules HEAD will be considered modifications, all changes to the work tree of the submodule will be ignored. When using this value, the submodule will not be scanned for work tree changes at all, leading to a performance benefit on large submodules. "untracked": Only untracked files in the submodules work tree are ignored, a changed HEAD and/or modified files in the submodule will mark it as modified. "none" (which is the default): Either untracked or modified files in a submodules work tree or a difference between the subdmodules HEAD and the commit recorded in the superproject will make it show up as changed. This value is added as a new parameter for the "--ignore-submodules" option of the diff family and "git status" so the user can override the settings in the configuration. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-08-05 22:39:25 +00:00
else if (strcmp(arg, "none"))
Add the option "--ignore-submodules" to "git status" In some use cases it is not desirable that "git status" considers submodules that only contain untracked content as dirty. This may happen e.g. when the submodule is not under the developers control and not all build generated files have been added to .gitignore by the upstream developers. Using the "untracked" parameter for the "--ignore-submodules" option disables checking for untracked content and lets git diff report them as changed only when they have new commits or modified content. Sometimes it is not wanted to have submodules show up as changed when they just contain changes to their work tree (this was the behavior before 1.7.0). An example for that are scripts which just want to check for submodule commits while ignoring any changes to the work tree. Also users having large submodules known not to change might want to use this option, as the - sometimes substantial - time it takes to scan the submodule work tree(s) is saved when using the "dirty" parameter. And if you want to ignore any changes to submodules, you can now do that by using this option without parameters or with "all" (when the config option status.submodulesummary is set, using "all" will also suppress the output of the submodule summary). A new function handle_ignore_submodules_arg() is introduced to parse this option new to "git status" in a single location, as "git diff" already knew it. Signed-off-by: Jens Lehmann <Jens.Lehmann@web.de> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2010-06-25 14:56:47 +00:00
die("bad --ignore-submodules argument: %s", arg);
}
void show_submodule_summary(FILE *f, const char *path,
unsigned char one[20], unsigned char two[20],
unsigned dirty_submodule,
const char *del, const char *add, const char *reset)
{
struct rev_info rev;
struct commit *commit, *left = left, *right = right;
struct commit_list *merge_bases, *list;
const char *message = NULL;
struct strbuf sb = STRBUF_INIT;
static const char *format = " %m %s";
int fast_forward = 0, fast_backward = 0;
if (is_null_sha1(two))
message = "(submodule deleted)";
else if (add_submodule_odb(path))
message = "(not checked out)";
else if (is_null_sha1(one))
message = "(new submodule)";
else if (!(left = lookup_commit_reference(one)) ||
!(right = lookup_commit_reference(two)))
message = "(commits not present)";
if (!message) {
init_revisions(&rev, NULL);
setup_revisions(0, NULL, &rev, NULL);
rev.left_right = 1;
rev.first_parent_only = 1;
left->object.flags |= SYMMETRIC_LEFT;
add_pending_object(&rev, &left->object, path);
add_pending_object(&rev, &right->object, path);
merge_bases = get_merge_bases(left, right, 1);
if (merge_bases) {
if (merge_bases->item == left)
fast_forward = 1;
else if (merge_bases->item == right)
fast_backward = 1;
}
for (list = merge_bases; list; list = list->next) {
list->item->object.flags |= UNINTERESTING;
add_pending_object(&rev, &list->item->object,
sha1_to_hex(list->item->object.sha1));
}
if (prepare_revision_walk(&rev))
message = "(revision walker failed)";
}
if (dirty_submodule & DIRTY_SUBMODULE_UNTRACKED)
fprintf(f, "Submodule %s contains untracked content\n", path);
if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
fprintf(f, "Submodule %s contains modified content\n", path);
if (!hashcmp(one, two)) {
strbuf_release(&sb);
return;
}
strbuf_addf(&sb, "Submodule %s %s..", path,
find_unique_abbrev(one, DEFAULT_ABBREV));
if (!fast_backward && !fast_forward)
strbuf_addch(&sb, '.');
strbuf_addf(&sb, "%s", find_unique_abbrev(two, DEFAULT_ABBREV));
if (message)
strbuf_addf(&sb, " %s\n", message);
else
strbuf_addf(&sb, "%s:\n", fast_backward ? " (rewind)" : "");
fwrite(sb.buf, sb.len, 1, f);
if (!message) {
while ((commit = get_revision(&rev))) {
2009-10-31 03:18:31 +00:00
struct pretty_print_context ctx = {0};
ctx.date_mode = rev.date_mode;
strbuf_setlen(&sb, 0);
if (commit->object.flags & SYMMETRIC_LEFT) {
if (del)
strbuf_addstr(&sb, del);
}
else if (add)
strbuf_addstr(&sb, add);
2009-10-31 03:18:31 +00:00
format_commit_message(commit, format, &sb, &ctx);
if (reset)
strbuf_addstr(&sb, reset);
strbuf_addch(&sb, '\n');
fprintf(f, "%s", sb.buf);
}
clear_commit_marks(left, ~0);
clear_commit_marks(right, ~0);
}
strbuf_release(&sb);
}
void set_config_fetch_recurse_submodules(int value)
{
config_fetch_recurse_submodules = value;
}
int fetch_populated_submodules(int num_options, const char **options,
const char *prefix, int ignore_config,
int quiet)
{
int i, result = 0, argc = 0;
struct child_process cp;
const char **argv;
struct string_list_item *name_for_path;
const char *work_tree = get_git_work_tree();
if (!work_tree)
return 0;
if (!the_index.initialized)
if (read_cache() < 0)
die("index file corrupt");
/* 4: "fetch" (options) "--submodule-prefix" prefix NULL */
argv = xcalloc(num_options + 4, sizeof(const char *));
argv[argc++] = "fetch";
for (i = 0; i < num_options; i++)
argv[argc++] = options[i];
argv[argc++] = "--submodule-prefix";
memset(&cp, 0, sizeof(cp));
cp.argv = argv;
cp.env = local_repo_env;
cp.git_cmd = 1;
cp.no_stdin = 1;
for (i = 0; i < active_nr; i++) {
struct strbuf submodule_path = STRBUF_INIT;
struct strbuf submodule_git_dir = STRBUF_INIT;
struct strbuf submodule_prefix = STRBUF_INIT;
struct cache_entry *ce = active_cache[i];
const char *git_dir, *name;
if (!S_ISGITLINK(ce->ce_mode))
continue;
name = ce->name;
name_for_path = unsorted_string_list_lookup(&config_name_for_path, ce->name);
if (name_for_path)
name = name_for_path->util;
if (!ignore_config) {
struct string_list_item *fetch_recurse_submodules_option;
fetch_recurse_submodules_option = unsorted_string_list_lookup(&config_fetch_recurse_submodules_for_name, name);
if (fetch_recurse_submodules_option) {
if (!fetch_recurse_submodules_option->util)
continue;
} else {
if (!config_fetch_recurse_submodules)
continue;
}
}
strbuf_addf(&submodule_path, "%s/%s", work_tree, ce->name);
strbuf_addf(&submodule_git_dir, "%s/.git", submodule_path.buf);
strbuf_addf(&submodule_prefix, "%s%s/", prefix, ce->name);
git_dir = read_gitfile_gently(submodule_git_dir.buf);
if (!git_dir)
git_dir = submodule_git_dir.buf;
if (is_directory(git_dir)) {
if (!quiet)
printf("Fetching submodule %s%s\n", prefix, ce->name);
cp.dir = submodule_path.buf;
argv[argc] = submodule_prefix.buf;
if (run_command(&cp))
result = 1;
}
strbuf_release(&submodule_path);
strbuf_release(&submodule_git_dir);
strbuf_release(&submodule_prefix);
}
free(argv);
return result;
}
unsigned is_submodule_modified(const char *path, int ignore_untracked)
{
ssize_t len;
struct child_process cp;
const char *argv[] = {
"status",
"--porcelain",
NULL,
NULL,
};
struct strbuf buf = STRBUF_INIT;
unsigned dirty_submodule = 0;
const char *line, *next_line;
const char *git_dir;
strbuf_addf(&buf, "%s/.git", path);
git_dir = read_gitfile_gently(buf.buf);
if (!git_dir)
git_dir = buf.buf;
if (!is_directory(git_dir)) {
strbuf_release(&buf);
/* The submodule is not checked out, so it is not modified */
return 0;
}
strbuf_reset(&buf);
if (ignore_untracked)
argv[2] = "-uno";
memset(&cp, 0, sizeof(cp));
cp.argv = argv;
cp.env = local_repo_env;
cp.git_cmd = 1;
cp.no_stdin = 1;
cp.out = -1;
cp.dir = path;
if (start_command(&cp))
die("Could not run git status --porcelain");
len = strbuf_read(&buf, cp.out, 1024);
line = buf.buf;
while (len > 2) {
if ((line[0] == '?') && (line[1] == '?')) {
dirty_submodule |= DIRTY_SUBMODULE_UNTRACKED;
if (dirty_submodule & DIRTY_SUBMODULE_MODIFIED)
break;
} else {
dirty_submodule |= DIRTY_SUBMODULE_MODIFIED;
if (ignore_untracked ||
(dirty_submodule & DIRTY_SUBMODULE_UNTRACKED))
break;
}
next_line = strchr(line, '\n');
if (!next_line)
break;
next_line++;
len -= (next_line - line);
line = next_line;
}
close(cp.out);
if (finish_command(&cp))
die("git status --porcelain failed");
strbuf_release(&buf);
return dirty_submodule;
}
static int find_first_merges(struct object_array *result, const char *path,
struct commit *a, struct commit *b)
{
int i, j;
struct object_array merges;
struct commit *commit;
int contains_another;
char merged_revision[42];
const char *rev_args[] = { "rev-list", "--merges", "--ancestry-path",
"--all", merged_revision, NULL };
struct rev_info revs;
struct setup_revision_opt rev_opts;
memset(&merges, 0, sizeof(merges));
memset(result, 0, sizeof(struct object_array));
memset(&rev_opts, 0, sizeof(rev_opts));
/* get all revisions that merge commit a */
snprintf(merged_revision, sizeof(merged_revision), "^%s",
sha1_to_hex(a->object.sha1));
init_revisions(&revs, NULL);
rev_opts.submodule = path;
setup_revisions(sizeof(rev_args)/sizeof(char *)-1, rev_args, &revs, &rev_opts);
/* save all revisions from the above list that contain b */
if (prepare_revision_walk(&revs))
die("revision walk setup failed");
while ((commit = get_revision(&revs)) != NULL) {
struct object *o = &(commit->object);
if (in_merge_bases(b, &commit, 1))
add_object_array(o, NULL, &merges);
}
/* Now we've got all merges that contain a and b. Prune all
* merges that contain another found merge and save them in
* result.
*/
for (i = 0; i < merges.nr; i++) {
struct commit *m1 = (struct commit *) merges.objects[i].item;
contains_another = 0;
for (j = 0; j < merges.nr; j++) {
struct commit *m2 = (struct commit *) merges.objects[j].item;
if (i != j && in_merge_bases(m2, &m1, 1)) {
contains_another = 1;
break;
}
}
if (!contains_another)
add_object_array(merges.objects[i].item,
merges.objects[i].name, result);
}
free(merges.objects);
return result->nr;
}
static void print_commit(struct commit *commit)
{
struct strbuf sb = STRBUF_INIT;
struct pretty_print_context ctx = {0};
ctx.date_mode = DATE_NORMAL;
format_commit_message(commit, " %h: %m %s", &sb, &ctx);
fprintf(stderr, "%s\n", sb.buf);
strbuf_release(&sb);
}
#define MERGE_WARNING(path, msg) \
warning("Failed to merge submodule %s (%s)", path, msg);
int merge_submodule(unsigned char result[20], const char *path,
const unsigned char base[20], const unsigned char a[20],
const unsigned char b[20])
{
struct commit *commit_base, *commit_a, *commit_b;
int parent_count;
struct object_array merges;
int i;
/* store a in result in case we fail */
hashcpy(result, a);
/* we can not handle deletion conflicts */
if (is_null_sha1(base))
return 0;
if (is_null_sha1(a))
return 0;
if (is_null_sha1(b))
return 0;
if (add_submodule_odb(path)) {
MERGE_WARNING(path, "not checked out");
return 0;
}
if (!(commit_base = lookup_commit_reference(base)) ||
!(commit_a = lookup_commit_reference(a)) ||
!(commit_b = lookup_commit_reference(b))) {
MERGE_WARNING(path, "commits not present");
return 0;
}
/* check whether both changes are forward */
if (!in_merge_bases(commit_base, &commit_a, 1) ||
!in_merge_bases(commit_base, &commit_b, 1)) {
MERGE_WARNING(path, "commits don't follow merge-base");
return 0;
}
/* Case #1: a is contained in b or vice versa */
if (in_merge_bases(commit_a, &commit_b, 1)) {
hashcpy(result, b);
return 1;
}
if (in_merge_bases(commit_b, &commit_a, 1)) {
hashcpy(result, a);
return 1;
}
/*
* Case #2: There are one or more merges that contain a and b in
* the submodule. If there is only one, then present it as a
* suggestion to the user, but leave it marked unmerged so the
* user needs to confirm the resolution.
*/
/* find commit which merges them */
parent_count = find_first_merges(&merges, path, commit_a, commit_b);
switch (parent_count) {
case 0:
MERGE_WARNING(path, "merge following commits not found");
break;
case 1:
MERGE_WARNING(path, "not fast-forward");
fprintf(stderr, "Found a possible merge resolution "
"for the submodule:\n");
print_commit((struct commit *) merges.objects[0].item);
fprintf(stderr,
"If this is correct simply add it to the index "
"for example\n"
"by using:\n\n"
" git update-index --cacheinfo 160000 %s \"%s\"\n\n"
"which will accept this suggestion.\n",
sha1_to_hex(merges.objects[0].item->sha1), path);
break;
default:
MERGE_WARNING(path, "multiple merges found");
for (i = 0; i < merges.nr; i++)
print_commit((struct commit *) merges.objects[i].item);
}
free(merges.objects);
return 0;
}