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
--- a/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);
+}