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Copy pathstatus.c
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517 lines (433 loc) · 13.3 KB
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/*
* libgit2 "status" example - shows how to use the status APIs
*
* Written by the libgit2 contributors
*
* To the extent possible under law, the author(s) have dedicated all copyright
* and related and neighboring rights to this software to the public domain
* worldwide. This software is distributed without any warranty.
*
* You should have received a copy of the CC0 Public Domain Dedication along
* with this software. If not, see
* <http://creativecommons.org/publicdomain/zero/1.0/>.
*/
#include "common.h"
#ifdef _WIN32
# include <Windows.h>
# define sleep(a) Sleep(a * 1000)
#else
# include <unistd.h>
#endif
/**
* This example demonstrates the use of the libgit2 status APIs,
* particularly the `git_status_list` object, to roughly simulate the
* output of running `git status`. It serves as a simple example of
* using those APIs to get basic status information.
*
* This does not have:
*
* - Robust error handling
* - Colorized or paginated output formatting
*
* This does have:
*
* - Examples of translating command line arguments to the status
* options settings to mimic `git status` results.
* - A sample status formatter that matches the default "long" format
* from `git status`
* - A sample status formatter that matches the "short" format
*/
enum {
FORMAT_DEFAULT = 0,
FORMAT_LONG = 1,
FORMAT_SHORT = 2,
FORMAT_PORCELAIN = 3,
};
#define MAX_PATHSPEC 8
struct opts {
git_status_options statusopt;
char *repodir;
char *pathspec[MAX_PATHSPEC];
int npaths;
int format;
int zterm;
int showbranch;
int showsubmod;
int repeat;
};
static void parse_opts(struct opts *o, int argc, char *argv[]);
static void show_branch(git_repository *repo, int format);
static void print_long(git_status_list *status);
static void print_short(git_repository *repo, git_status_list *status);
static int print_submod(git_submodule *sm, const char *name, void *payload);
int main(int argc, char *argv[])
{
git_repository *repo = NULL;
git_status_list *status;
struct opts o = { GIT_STATUS_OPTIONS_INIT, "." };
git_libgit2_init();
o.statusopt.show = GIT_STATUS_SHOW_INDEX_AND_WORKDIR;
o.statusopt.flags = GIT_STATUS_OPT_INCLUDE_UNTRACKED |
GIT_STATUS_OPT_RENAMES_HEAD_TO_INDEX |
GIT_STATUS_OPT_SORT_CASE_SENSITIVELY;
parse_opts(&o, argc, argv);
/**
* Try to open the repository at the given path (or at the current
* directory if none was given).
*/
check_lg2(git_repository_open_ext(&repo, o.repodir, 0, NULL),
"Could not open repository", o.repodir);
if (git_repository_is_bare(repo))
fatal("Cannot report status on bare repository",
git_repository_path(repo));
show_status:
if (o.repeat)
printf("\033[H\033[2J");
/**
* Run status on the repository
*
* We use `git_status_list_new()` to generate a list of status
* information which lets us iterate over it at our
* convenience and extract the data we want to show out of
* each entry.
*
* You can use `git_status_foreach()` or
* `git_status_foreach_ext()` if you'd prefer to execute a
* callback for each entry. The latter gives you more control
* about what results are presented.
*/
check_lg2(git_status_list_new(&status, repo, &o.statusopt),
"Could not get status", NULL);
if (o.showbranch)
show_branch(repo, o.format);
if (o.showsubmod) {
int submod_count = 0;
check_lg2(git_submodule_foreach(repo, print_submod, &submod_count),
"Cannot iterate submodules", o.repodir);
}
if (o.format == FORMAT_LONG)
print_long(status);
else
print_short(repo, status);
git_status_list_free(status);
if (o.repeat) {
sleep(o.repeat);
goto show_status;
}
git_repository_free(repo);
git_libgit2_shutdown();
return 0;
}
/**
* If the user asked for the branch, let's show the short name of the
* branch.
*/
static void show_branch(git_repository *repo, int format)
{
int error = 0;
const char *branch = NULL;
git_reference *head = NULL;
error = git_repository_head(&head, repo);
if (error == GIT_EUNBORNBRANCH || error == GIT_ENOTFOUND)
branch = NULL;
else if (!error) {
branch = git_reference_shorthand(head);
} else
check_lg2(error, "failed to get current branch", NULL);
if (format == FORMAT_LONG)
printf("# On branch %s\n",
branch ? branch : "Not currently on any branch.");
else
printf("## %s\n", branch ? branch : "HEAD (no branch)");
git_reference_free(head);
}
/**
* This function print out an output similar to git's status command
* in long form, including the command-line hints.
*/
static void print_long(git_status_list *status)
{
size_t i, maxi = git_status_list_entrycount(status);
const git_status_entry *s;
int header = 0, changes_in_index = 0;
int changed_in_workdir = 0, rm_in_workdir = 0;
const char *old_path, *new_path;
/** Print index changes. */
for (i = 0; i < maxi; ++i) {
char *istatus = NULL;
s = git_status_byindex(status, i);
if (s->status == GIT_STATUS_CURRENT)
continue;
if (s->status & GIT_STATUS_WT_DELETED)
rm_in_workdir = 1;
if (s->status & GIT_STATUS_INDEX_NEW)
istatus = "new file: ";
if (s->status & GIT_STATUS_INDEX_MODIFIED)
istatus = "modified: ";
if (s->status & GIT_STATUS_INDEX_DELETED)
istatus = "deleted: ";
if (s->status & GIT_STATUS_INDEX_RENAMED)
istatus = "renamed: ";
if (s->status & GIT_STATUS_INDEX_TYPECHANGE)
istatus = "typechange:";
if (istatus == NULL)
continue;
if (!header) {
printf("# Changes to be committed:\n");
printf("# (use \"git reset HEAD <file>...\" to unstage)\n");
printf("#\n");
header = 1;
}
old_path = s->head_to_index->old_file.path;
new_path = s->head_to_index->new_file.path;
if (old_path && new_path && strcmp(old_path, new_path))
printf("#\t%s %s -> %s\n", istatus, old_path, new_path);
else
printf("#\t%s %s\n", istatus, old_path ? old_path : new_path);
}
if (header) {
changes_in_index = 1;
printf("#\n");
}
header = 0;
/** Print workdir changes to tracked files. */
for (i = 0; i < maxi; ++i) {
char *wstatus = NULL;
s = git_status_byindex(status, i);
/**
* With `GIT_STATUS_OPT_INCLUDE_UNMODIFIED` (not used in this example)
* `index_to_workdir` may not be `NULL` even if there are
* no differences, in which case it will be a `GIT_DELTA_UNMODIFIED`.
*/
if (s->status == GIT_STATUS_CURRENT || s->index_to_workdir == NULL)
continue;
/** Print out the output since we know the file has some changes */
if (s->status & GIT_STATUS_WT_MODIFIED)
wstatus = "modified: ";
if (s->status & GIT_STATUS_WT_DELETED)
wstatus = "deleted: ";
if (s->status & GIT_STATUS_WT_RENAMED)
wstatus = "renamed: ";
if (s->status & GIT_STATUS_WT_TYPECHANGE)
wstatus = "typechange:";
if (wstatus == NULL)
continue;
if (!header) {
printf("# Changes not staged for commit:\n");
printf("# (use \"git add%s <file>...\" to update what will be committed)\n", rm_in_workdir ? "/rm" : "");
printf("# (use \"git checkout -- <file>...\" to discard changes in working directory)\n");
printf("#\n");
header = 1;
}
old_path = s->index_to_workdir->old_file.path;
new_path = s->index_to_workdir->new_file.path;
if (old_path && new_path && strcmp(old_path, new_path))
printf("#\t%s %s -> %s\n", wstatus, old_path, new_path);
else
printf("#\t%s %s\n", wstatus, old_path ? old_path : new_path);
}
if (header) {
changed_in_workdir = 1;
printf("#\n");
}
/** Print untracked files. */
header = 0;
for (i = 0; i < maxi; ++i) {
s = git_status_byindex(status, i);
if (s->status == GIT_STATUS_WT_NEW) {
if (!header) {
printf("# Untracked files:\n");
printf("# (use \"git add <file>...\" to include in what will be committed)\n");
printf("#\n");
header = 1;
}
printf("#\t%s\n", s->index_to_workdir->old_file.path);
}
}
header = 0;
/** Print ignored files. */
for (i = 0; i < maxi; ++i) {
s = git_status_byindex(status, i);
if (s->status == GIT_STATUS_IGNORED) {
if (!header) {
printf("# Ignored files:\n");
printf("# (use \"git add -f <file>...\" to include in what will be committed)\n");
printf("#\n");
header = 1;
}
printf("#\t%s\n", s->index_to_workdir->old_file.path);
}
}
if (!changes_in_index && changed_in_workdir)
printf("no changes added to commit (use \"git add\" and/or \"git commit -a\")\n");
}
/**
* This version of the output prefixes each path with two status
* columns and shows submodule status information.
*/
static void print_short(git_repository *repo, git_status_list *status)
{
size_t i, maxi = git_status_list_entrycount(status);
const git_status_entry *s;
char istatus, wstatus;
const char *extra, *a, *b, *c;
for (i = 0; i < maxi; ++i) {
s = git_status_byindex(status, i);
if (s->status == GIT_STATUS_CURRENT)
continue;
a = b = c = NULL;
istatus = wstatus = ' ';
extra = "";
if (s->status & GIT_STATUS_INDEX_NEW)
istatus = 'A';
if (s->status & GIT_STATUS_INDEX_MODIFIED)
istatus = 'M';
if (s->status & GIT_STATUS_INDEX_DELETED)
istatus = 'D';
if (s->status & GIT_STATUS_INDEX_RENAMED)
istatus = 'R';
if (s->status & GIT_STATUS_INDEX_TYPECHANGE)
istatus = 'T';
if (s->status & GIT_STATUS_WT_NEW) {
if (istatus == ' ')
istatus = '?';
wstatus = '?';
}
if (s->status & GIT_STATUS_WT_MODIFIED)
wstatus = 'M';
if (s->status & GIT_STATUS_WT_DELETED)
wstatus = 'D';
if (s->status & GIT_STATUS_WT_RENAMED)
wstatus = 'R';
if (s->status & GIT_STATUS_WT_TYPECHANGE)
wstatus = 'T';
if (s->status & GIT_STATUS_IGNORED) {
istatus = '!';
wstatus = '!';
}
if (istatus == '?' && wstatus == '?')
continue;
/**
* A commit in a tree is how submodules are stored, so
* let's go take a look at its status.
*/
if (s->index_to_workdir &&
s->index_to_workdir->new_file.mode == GIT_FILEMODE_COMMIT)
{
unsigned int smstatus = 0;
if (!git_submodule_status(&smstatus, repo, s->index_to_workdir->new_file.path,
GIT_SUBMODULE_IGNORE_UNSPECIFIED)) {
if (smstatus & GIT_SUBMODULE_STATUS_WD_MODIFIED)
extra = " (new commits)";
else if (smstatus & GIT_SUBMODULE_STATUS_WD_INDEX_MODIFIED)
extra = " (modified content)";
else if (smstatus & GIT_SUBMODULE_STATUS_WD_WD_MODIFIED)
extra = " (modified content)";
else if (smstatus & GIT_SUBMODULE_STATUS_WD_UNTRACKED)
extra = " (untracked content)";
}
}
/**
* Now that we have all the information, format the output.
*/
if (s->head_to_index) {
a = s->head_to_index->old_file.path;
b = s->head_to_index->new_file.path;
}
if (s->index_to_workdir) {
if (!a)
a = s->index_to_workdir->old_file.path;
if (!b)
b = s->index_to_workdir->old_file.path;
c = s->index_to_workdir->new_file.path;
}
if (istatus == 'R') {
if (wstatus == 'R')
printf("%c%c %s %s %s%s\n", istatus, wstatus, a, b, c, extra);
else
printf("%c%c %s %s%s\n", istatus, wstatus, a, b, extra);
} else {
if (wstatus == 'R')
printf("%c%c %s %s%s\n", istatus, wstatus, a, c, extra);
else
printf("%c%c %s%s\n", istatus, wstatus, a, extra);
}
}
for (i = 0; i < maxi; ++i) {
s = git_status_byindex(status, i);
if (s->status == GIT_STATUS_WT_NEW)
printf("?? %s\n", s->index_to_workdir->old_file.path);
}
}
static int print_submod(git_submodule *sm, const char *name, void *payload)
{
int *count = payload;
(void)name;
if (*count == 0)
printf("# Submodules\n");
(*count)++;
printf("# - submodule '%s' at %s\n",
git_submodule_name(sm), git_submodule_path(sm));
return 0;
}
/**
* Parse options that git's status command supports.
*/
static void parse_opts(struct opts *o, int argc, char *argv[])
{
struct args_info args = ARGS_INFO_INIT;
for (args.pos = 1; args.pos < argc; ++args.pos) {
char *a = argv[args.pos];
if (a[0] != '-') {
if (o->npaths < MAX_PATHSPEC)
o->pathspec[o->npaths++] = a;
else
fatal("Example only supports a limited pathspec", NULL);
}
else if (!strcmp(a, "-s") || !strcmp(a, "--short"))
o->format = FORMAT_SHORT;
else if (!strcmp(a, "--long"))
o->format = FORMAT_LONG;
else if (!strcmp(a, "--porcelain"))
o->format = FORMAT_PORCELAIN;
else if (!strcmp(a, "-b") || !strcmp(a, "--branch"))
o->showbranch = 1;
else if (!strcmp(a, "-z")) {
o->zterm = 1;
if (o->format == FORMAT_DEFAULT)
o->format = FORMAT_PORCELAIN;
}
else if (!strcmp(a, "--ignored"))
o->statusopt.flags |= GIT_STATUS_OPT_INCLUDE_IGNORED;
else if (!strcmp(a, "-uno") ||
!strcmp(a, "--untracked-files=no"))
o->statusopt.flags &= ~GIT_STATUS_OPT_INCLUDE_UNTRACKED;
else if (!strcmp(a, "-unormal") ||
!strcmp(a, "--untracked-files=normal"))
o->statusopt.flags |= GIT_STATUS_OPT_INCLUDE_UNTRACKED;
else if (!strcmp(a, "-uall") ||
!strcmp(a, "--untracked-files=all"))
o->statusopt.flags |= GIT_STATUS_OPT_INCLUDE_UNTRACKED |
GIT_STATUS_OPT_RECURSE_UNTRACKED_DIRS;
else if (!strcmp(a, "--ignore-submodules=all"))
o->statusopt.flags |= GIT_STATUS_OPT_EXCLUDE_SUBMODULES;
else if (!strncmp(a, "--git-dir=", strlen("--git-dir=")))
o->repodir = a + strlen("--git-dir=");
else if (!strcmp(a, "--repeat"))
o->repeat = 10;
else if (match_int_arg(&o->repeat, &args, "--repeat", 0))
/* okay */;
else if (!strcmp(a, "--list-submodules"))
o->showsubmod = 1;
else
check_lg2(-1, "Unsupported option", a);
}
if (o->format == FORMAT_DEFAULT)
o->format = FORMAT_LONG;
if (o->format == FORMAT_LONG)
o->showbranch = 1;
if (o->npaths > 0) {
o->statusopt.pathspec.strings = o->pathspec;
o->statusopt.pathspec.count = o->npaths;
}
}
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