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Copy pathgit.c
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181 lines (151 loc) · 4.37 KB
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#include <limits.h>
#include <string.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <pthread.h>
#include "colors.h"
#include "ep.h"
struct git_info {
char *git_branch_name, *git_status, *git_root;
};
void print_git(void *arg)
{
struct git_info *git_info = arg;
if (git_info->git_branch_name) {
p(" ");
use_color(magenta, p(git_info->git_branch_name));
fg_color(blue);
if (git_info->git_status) {
p(" [");
p(git_info->git_status);
p("]");
}
reset_color();
}
}
void free_git(void *arg)
{
struct git_info *git_info = arg;
if (git_info) {
free(git_info->git_branch_name);
free(git_info->git_status);
free(git_info->git_root);
free(git_info);
}
}
struct rlfc_data {
char *line;
size_t n;
ssize_t l;
int status;
};
static void read_line_from_command(const char *cmd, struct rlfc_data *d)
{
FILE *f = popen(cmd, "re");
if (!f)
return;
d->l = getline(&d->line, &d->n, f);
d->status = pclose(f);
if (d->l > 0) {
d->line[d->l-1] = 0;
}
}
static void *get_git_status(void *);
static void *get_git_root(void *);
void *git_thread(void *arg)
{
struct threaded_task *root_lang_task = arg;
/* only knows how to launch this task */
if (root_lang_task->task != task_launch_root_lang) root_lang_task = NULL;
struct rlfc_data c = { 0 };
read_line_from_command("git rev-parse --abbrev-ref HEAD 2>/dev/null", &c);
struct git_info *git_info;
if (!c.status && c.l > 0) {
/* if git exits with 0 and outputs a string with content, we are in a repo */
/* TODO: treat case where it reads HEAD */
git_info = calloc(1, sizeof *git_info);
/* if we can't even allocate that, bail out */
if (!git_info)
return NULL;
/* line ownserhip goes to outside this function */
git_info->git_branch_name = c.line;
} else {
return NULL;
}
/* since we are in a repo, read git status;
* if we add more stuff to do in repos, launch more threads */
pthread_t status_handle, root_handle;
if (pthread_create(&status_handle, thread_a, get_git_status, git_info))
goto status_create_error;
if (pthread_create(&root_handle, thread_a, get_git_root, git_info))
goto root_create_error;
pthread_join(root_handle, NULL);
if (root_lang_task && git_info->git_root) {
root_lang_task->launched = !pthread_create(&root_lang_task->handle, thread_a, lang_thread, git_info->git_root);
}
root_create_error:
pthread_join(status_handle, NULL);
status_create_error:
return git_info;
}
static void *get_git_status(void *arg)
{
struct git_info *git_info = arg;
FILE *f = popen("timeout 0.8s git --no-optional-locks status --porcelain=v1 --untracked-files=no -z 2>/dev/null", "re");
if (!f)
return NULL;
typedef uint_fast16_t t_format;
#define FORMAT(s) (((t_format)(unsigned char)s[0]) | (((t_format)(unsigned char)s[1]) << CHAR_BIT))
enum status_index { added, deleted, modified_unstaged, modified_staged, modified_both, untracked, status_index_n };
struct statuses {
size_t c;
char s[32];
t_format format;
char prefix;
} g[status_index_n] = {
[added] = { .format = FORMAT("A "), .prefix = '+' },
[deleted] = { .format = FORMAT("D "), .prefix = '-' },
[modified_unstaged] = { .format = FORMAT(" M"), .prefix = '~' },
[modified_staged] = { .format = FORMAT("M "), .prefix = '>' },
[modified_both] = { .format = FORMAT("MM"), .prefix = '~' },
[untracked] = { .format = FORMAT("??"), .prefix = '+' },
};
char *line = NULL;
size_t n = 0;
ssize_t l;
while ((l = getdelim(&line, &n, 0, f)) != -1) {
if (l > 4) {
for (int i = 0; i < status_index_n; i++) {
g[i].c += FORMAT(line) == g[i].format;
}
}
}
free(line);
#undef FORMAT
/* cheat to display things closer to a "userful" measure */
g[added].c += g[modified_staged].c + g[modified_both].c;
g[modified_unstaged].c += g[modified_both].c;
if (!pclose(f)) {
for (int i = 0; i < status_index_n; i++) {
if (g[i].c) {
snprintf(g[i].s, sizeof(g[i].s), "%c%zu", g[i].prefix, g[i].c);
}
}
if (asprintf(&git_info->git_status, "%s%s%s", g[added].s, g[deleted].s, g[modified_unstaged].s) == 0) {
/* if string is empty, don't display it */
free(git_info->git_status);
git_info->git_status = NULL;
}
}
return git_info->git_status;
}
static void *get_git_root(void *arg)
{
struct git_info *git_info = arg;
struct rlfc_data c = { 0 };
read_line_from_command("git rev-parse --show-toplevel 2>/dev/null", &c);
if (c.l > 0)
git_info->git_root = c.line;
return git_info->git_root;
}