Add support for snapshots

Make a link from the commit viewer to a snapshot of the corresponding tree.

Currently only zip-format is supported.

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

1 files changed, 47 insertions, 0 deletions

diff --git a/ui-snapshot.c b/ui-snapshot.c
new file mode 100644
index 0000000..2257d6b
--- /dev/null
+++ b/ui-snapshot.c
@@ -0,0 +1,47 @@
+/* ui-snapshot.c: generate snapshot of a commit
+ *
+ * Copyright (C) 2006 Lars Hjemli
+ *
+ * Licensed under GNU General Public License v2
+ *   (see COPYING for full license text)
+ */
+
+#include "cgit.h"
+
+static void cgit_print_zip(struct cacheitem *item, const char *hex, 
+                           const char *prefix, const char *filename)
+{
+        struct archiver_args args;
+        struct commit *commit;
+        unsigned char sha1[20];
+
+        if (get_sha1(hex, sha1)) {
+                cgit_print_error(fmt("Bad object id: %s", hex));
+                return;
+        }
+        commit = lookup_commit_reference(sha1);
+
+        if (!commit) {
+                cgit_print_error(fmt("Not a commit reference: %s", hex));
+                return;
+        }
+
+        memset(&args, 0, sizeof(args));
+        args.base = fmt("%s/", prefix);
+        args.tree = commit->tree;
+        
+        cgit_print_snapshot_start("application/x-zip", filename, item);
+        write_zip_archive(&args);
+}
+
+
+void cgit_print_snapshot(struct cacheitem *item, const char *hex, 
+                         const char *format, const char *prefix,
+                         const char *filename)
+{
+        if (!strcmp(format, "zip"))
+                cgit_print_zip(item, hex, prefix, filename);
+        else
+                cgit_print_error(fmt("Unsupported snapshot format: %s", 
+                                     format));
+}