Add support for --scan-tree=<path> option to cgit

This option makes cgit scan a directory tree looking for git repositories,
generating suitable definitions for a cgitrc file on stdout.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

1 files changed, 136 insertions, 0 deletions

diff --git a/scan-tree.c b/scan-tree.c
new file mode 100644
index 0000000..cdafb02
--- /dev/null
+++ b/scan-tree.c
@@ -0,0 +1,136 @@
+#include "cgit.h"
+#include "html.h"
+
+#define MAX_PATH 4096
+
+/* return 1 if path contains a objects/ directory and a HEAD file */
+static int is_git_dir(const char *path)
+{
+	struct stat st;
+	static char buf[MAX_PATH];
+
+	if (snprintf(buf, MAX_PATH, "%s/objects", path) >= MAX_PATH) {
+		fprintf(stderr, "Insanely long path: %s\n", path);
+		return 0;
+	}
+	if (stat(buf, &st)) {
+		if (errno != ENOENT)
+			fprintf(stderr, "Error checking path %s: %s (%d)\n",
+				path, strerror(errno), errno);
+		return 0;
+	}
+	if (!S_ISDIR(st.st_mode))
+		return 0;
+
+	sprintf(buf, "%s/HEAD", path);
+	if (stat(buf, &st)) {
+		if (errno != ENOENT)
+			fprintf(stderr, "Error checking path %s: %s (%d)\n",
+				path, strerror(errno), errno);
+		return 0;
+	}
+	if (!S_ISREG(st.st_mode))
+		return 0;
+
+	return 1;
+}
+
+char *readfile(const char *path)
+{
+	FILE *f;
+	static char buf[MAX_PATH];
+
+	if (!(f = fopen(path, "r")))
+		return NULL;
+	fgets(buf, MAX_PATH, f);
+	fclose(f);
+	return buf;
+}
+
+static void add_repo(const char *base, const char *path)
+{
+	struct cgit_repo *repo;
+	struct stat st;
+	struct passwd *pwd;
+	char *p;
+
+	if (stat(path, &st)) {
+		fprintf(stderr, "Error accessing %s: %s (%d)\n",
+			path, strerror(errno), errno);
+		return;
+	}
+	if ((pwd = getpwuid(st.st_uid)) == NULL) {
+		fprintf(stderr, "Error reading owner-info for %s: %s (%d)\n",
+			path, strerror(errno), errno);
+		return;
+	}
+	if (base == path)
+		p = fmt("%s", path);
+	else
+		p = fmt("%s", path + strlen(base) + 1);
+
+	if (!strcmp(p + strlen(p) - 5, "/.git"))
+		p[strlen(p) - 5] = '\0';
+
+	repo = cgit_add_repo(xstrdup(p));
+	repo->name = repo->url;
+	repo->path = xstrdup(path);
+	repo->owner = (pwd ? xstrdup(pwd->pw_gecos ? pwd->pw_gecos : pwd->pw_name) : "");
+
+	p = fmt("%s/description", path);
+	if (!stat(p, &st))
+		repo->desc = xstrdup(readfile(p));
+
+	p = fmt("%s/README.html", path);
+	if (!stat(p, &st))
+		repo->readme = "README.html";
+}
+
+static void scan_path(const char *base, const char *path)
+{
+	DIR *dir;
+	struct dirent *ent;
+	char *buf;
+	struct stat st;
+
+	if (is_git_dir(path)) {
+		add_repo(base, path);
+		return;
+	}
+	dir = opendir(path);
+	if (!dir) {
+		fprintf(stderr, "Error opening directory %s: %s (%d)\n",
+			path, strerror(errno), errno);
+		return;
+	}
+	while((ent = readdir(dir)) != NULL) {
+		if (ent->d_name[0] == '.') {
+			if (ent->d_name[1] == '\0')
+				continue;
+			if (ent->d_name[1] == '.' && ent->d_name[2] == '\0')
+				continue;
+		}
+		buf = malloc(strlen(path) + strlen(ent->d_name) + 2);
+		if (!buf) {
+			fprintf(stderr, "Alloc error on %s: %s (%d)\n",
+				path, strerror(errno), errno);
+			exit(1);
+		}
+		sprintf(buf, "%s/%s", path, ent->d_name);
+		if (stat(buf, &st)) {
+			fprintf(stderr, "Error checking path %s: %s (%d)\n",
+				buf, strerror(errno), errno);
+			free(buf);
+			continue;
+		}
+		if (S_ISDIR(st.st_mode))
+			scan_path(base, buf);
+		free(buf);
+	}
+	closedir(dir);
+}
+
+void scan_tree(const char *path)
+{
+	scan_path(path, path);
+}