add support for snapshot tarballs

- reworked cgit_print_snapshot to use a list of supported archivers and pick
	one for the suffix supplied
- moved printing of snaphot links into ui-snapshot and make it iterate through
	the said list

4 files changed, 55 insertions, 37 deletions

diff --git a/cgit.c b/cgit.c
index 1281bfa..a0f88ad 100644
--- a/cgit.c
+++ b/cgit.c
@@ -59,25 +59,25 @@ static void cgit_print_repo_page(struct cacheitem *item)
 		cgit_print_pageheader(title, 0);
 		cgit_print_error(fmt("Unable to scan repository: %s",
 				     strerror(errno)));
 		cgit_print_docend();
 		return;
 	}
 
 	title = fmt("%s - %s", cgit_repo->name, cgit_repo->desc);
 	show_search = 0;
 	setenv("GIT_DIR", cgit_repo->path, 1);
 
 	if ((cgit_cmd == CMD_SNAPSHOT) && cgit_repo->snapshots) {
-		cgit_print_snapshot(item, cgit_query_sha1, "zip",
+		cgit_print_snapshot(item, cgit_query_sha1,
 				    cgit_repo->url, cgit_query_name);
 		return;
 	}
 
 	if (cgit_cmd == CMD_BLOB) {
 		cgit_print_blob(item, cgit_query_sha1, cgit_query_path);
 		return;
 	}
 
 	show_search = (cgit_cmd == CMD_LOG);
 	cgit_print_docstart(title, item);
 	if (!cgit_cmd) {
diff --git a/cgit.h b/cgit.h
index 2ff5340..f01f6c9 100644
--- a/cgit.h
+++ b/cgit.h
@@ -221,16 +221,16 @@ extern void cgit_print_pageheader(char *title, int show_search);
 extern void cgit_print_snapshot_start(const char *mimetype,
 				      const char *filename,
 				      struct cacheitem *item);
 
 extern void cgit_print_repolist(struct cacheitem *item);
 extern void cgit_print_summary();
 extern void cgit_print_log(const char *tip, int ofs, int cnt, char *grep, char *path, int pager);
 extern void cgit_print_blob(struct cacheitem *item, const char *hex, char *path);
 extern void cgit_print_tree(const char *rev, char *path);
 extern void cgit_print_commit(char *hex);
 extern void cgit_print_diff(const char *new_hex, const char *old_hex);
 extern void cgit_print_snapshot(struct cacheitem *item, const char *hex,
-				const char *format, const char *prefix,
-				const char *filename);
+				const char *prefix, const char *filename);
+extern void cgit_print_snapshot_links(const char *repo, const char *hex);
 
 #endif /* CGIT_H */
diff --git a/ui-commit.c b/ui-commit.c
index 2679b59..bf5e6dc 100644
--- a/ui-commit.c
+++ b/ui-commit.c
@@ -130,25 +130,24 @@ void inspect_filepair(struct diff_filepair *pair)
 		max_changes = lines_added + lines_removed;
 	total_adds += lines_added;
 	total_rems += lines_removed;
 }
 
 
 void cgit_print_commit(char *hex)
 {
 	struct commit *commit, *parent;
 	struct commitinfo *info;
 	struct commit_list *p;
 	unsigned char sha1[20];
-	char *filename;
 	char *tmp;
 	int i;
 
 	if (!hex)
 		hex = cgit_query_head;
 	curr_rev = hex;
 
 	if (get_sha1(hex, sha1)) {
 		cgit_print_error(fmt("Bad object id: %s", hex));
 		return;
 	}
 	commit = lookup_commit_reference(sha1);
@@ -187,29 +186,27 @@ void cgit_print_commit(char *hex)
 			continue;
 		}
 		html("<tr><th>parent</th>"
 		     "<td colspan='2' class='sha1'>");
 		cgit_commit_link(sha1_to_hex(p->item->object.sha1), NULL, NULL,
 				 cgit_query_head, sha1_to_hex(p->item->object.sha1));
 		html(" (");
 		cgit_diff_link("diff", NULL, NULL, cgit_query_head, hex,
 			       sha1_to_hex(p->item->object.sha1), NULL);
 		html(")</td></tr>");
 	}
 	if (cgit_repo->snapshots) {
-		htmlf("<tr><th>download</th><td colspan='2' class='sha1'><a href='");
-		filename = fmt("%s-%s.zip", cgit_query_repo, hex);
-		html_attr(cgit_pageurl(cgit_query_repo, "snapshot",
-				       fmt("id=%s&amp;name=%s", hex, filename)));
-		htmlf("'>%s</a></td></tr>", filename);
+		html("<tr><th>download</th><td colspan='2' class='sha1'>");
+		cgit_print_snapshot_links(cgit_query_repo,hex);
+		html("</td></tr>");
 	}
 	html("</table>\n");
 	html("<div class='commit-subject'>");
 	html_txt(info->subject);
 	html("</div>");
 	html("<div class='commit-msg'>");
 	html_txt(info->msg);
 	html("</div>");
 	if (!(commit->parents && commit->parents->next && commit->parents->next->next)) {
 		html("<div class='diffstat-header'>Diffstat</div>");
 		html("<table class='diffstat'>");
 		max_changes = 0;
diff --git a/ui-snapshot.c b/ui-snapshot.c
index 2257d6b..eb5f1cd 100644
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -1,47 +1,68 @@
 /* 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)
+static const struct snapshot_archive_t {
+    	const char *suffix;
+	const char *mimetype;
+	write_archive_fn_t write_func;
+}	snapshot_archives[] = {
+	{ ".zip", "application/x-zip", write_zip_archive },
+	{ ".tar.gz", "application/x-gzip", write_tar_archive }
+};
+
+void cgit_print_snapshot(struct cacheitem *item, const char *hex, 
+			 const char *prefix, const char *filename)
 {
-	struct archiver_args args;
-	struct commit *commit;
-	unsigned char sha1[20];
+	int fnl = strlen(filename);
+	int f;
+    	for(f=0;f<(sizeof(snapshot_archives)/sizeof(*snapshot_archives));++f) {
+		const struct snapshot_archive_t* sat = &snapshot_archives[f];
+		int sl = strlen(sat->suffix);
+		if(fnl<sl || strcmp(&filename[fnl-sl],sat->suffix))
+			continue;
 
-	if (get_sha1(hex, sha1)) {
-		cgit_print_error(fmt("Bad object id: %s", hex));
-		return;
-	}
-	commit = lookup_commit_reference(sha1);
+		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;;
+		}
 
-	if (!commit) {
-		cgit_print_error(fmt("Not a commit reference: %s", hex));
+		memset(&args,0,sizeof(args));
+		args.base = fmt("%s/", prefix);
+		args.tree = commit->tree;
+
+		cgit_print_snapshot_start(sat->mimetype, filename, item);
+		(*sat->write_func)(&args);
 		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);
+	cgit_print_error(fmt("Unsupported snapshot format: %s", filename));
 }
 
-
-void cgit_print_snapshot(struct cacheitem *item, const char *hex, 
-			 const char *format, const char *prefix,
-			 const char *filename)
+void cgit_print_snapshot_links(const char *repo,const char *hex)
 {
-	if (!strcmp(format, "zip"))
-		cgit_print_zip(item, hex, prefix, filename);
-	else
-		cgit_print_error(fmt("Unsupported snapshot format: %s", 
-				     format));
+    	char *filename;
+	int f;
+    	for(f=0;f<(sizeof(snapshot_archives)/sizeof(*snapshot_archives));++f) {
+		const struct snapshot_archive_t* sat = &snapshot_archives[f];
+		filename = fmt("%s-%s%s",repo,hex,sat->suffix);
+		htmlf("<a href='%s'>%s</a><br/>",
+			cgit_pageurl(repo,"snapshot",
+			    fmt("id=%s&amp;name=%s",hex,filename)), filename);
+	}
 }