Add support for cloning over http

[ps-cgit] / ui-clone.c

diff --git a/ui-clone.c b/ui-clone.c
new file mode 100644 (file)
index 0000000..3a037ad
--- /dev/null
+++ b/ui-clone.c
@@ -0,0 +1,104 @@
+/* ui-clone.c: functions for http cloning, based on
+ * git's http-backend.c by Shawn O. Pearce
+ *
+ * Copyright (C) 2008 Lars Hjemli
+ *
+ * Licensed under GNU General Public License v2
+ *   (see COPYING for full license text)
+ */
+
+#include "cgit.h"
+#include "html.h"
+#include "ui-shared.h"
+
+static int print_ref_info(const char *refname, const unsigned char *sha1,
+                          int flags, void *cb_data)
+{
+       struct object *obj;
+
+       if (!(obj = parse_object(sha1)))
+               return 0;
+
+       if (!strcmp(refname, "HEAD") || !prefixcmp(refname, "refs/heads/"))
+               htmlf("%s\t%s\n", sha1_to_hex(sha1), refname);
+       else if (!prefixcmp(refname, "refs/tags") && obj->type == OBJ_TAG) {
+               if (!(obj = deref_tag(obj, refname, 0)))
+                       return 0;
+               htmlf("%s\t%s\n", sha1_to_hex(sha1), refname);
+               htmlf("%s\t%s^{}\n", sha1_to_hex(obj->sha1), refname);
+       }
+       return 0;
+}
+
+static void print_pack_info(struct cgit_context *ctx)
+{
+       struct packed_git *pack;
+       int ofs;
+
+       ctx->page.mimetype = "text/plain";
+       ctx->page.filename = "objects/info/packs";
+       cgit_print_http_headers(ctx);
+       ofs = strlen(ctx->repo->path) + strlen("/objects/pack/");
+       prepare_packed_git();
+       for (pack = packed_git; pack; pack = pack->next)
+               if (pack->pack_local)
+                       htmlf("P %s\n", pack->pack_name + ofs);
+}
+
+static void send_file(struct cgit_context *ctx, char *path)
+{
+       struct stat st;
+       int err;
+
+       if (stat(path, &st)) {
+               switch (errno) {
+               case ENOENT:
+                       err = 404;
+                       break;
+               case EACCES:
+                       err = 403;
+                       break;
+               default:
+                       err = 400;
+               }
+               html_status(err, 0);
+               return;
+       }
+       ctx->page.mimetype = "application/octet-stream";
+       ctx->page.filename = path;
+       if (prefixcmp(ctx->repo->path, path))
+               ctx->page.filename += strlen(ctx->repo->path) + 1;
+       cgit_print_http_headers(ctx);
+       html_include(path);
+}
+
+void cgit_clone_info(struct cgit_context *ctx)
+{
+       if (!ctx->qry.path || strcmp(ctx->qry.path, "refs"))
+               return;
+
+       ctx->page.mimetype = "text/plain";
+       ctx->page.filename = "info/refs";
+       cgit_print_http_headers(ctx);
+       for_each_ref(print_ref_info, ctx);
+}
+
+void cgit_clone_objects(struct cgit_context *ctx)
+{
+       if (!ctx->qry.path) {
+               html_status(400, 0);
+               return;
+       }
+
+       if (!strcmp(ctx->qry.path, "info/packs")) {
+               print_pack_info(ctx);
+               return;
+       }
+
+       send_file(ctx, git_path("objects/%s", ctx->qry.path));
+}
+
+void cgit_clone_head(struct cgit_context *ctx)
+{
+       send_file(ctx, git_path("%s", "HEAD"));
+}