9 files changed, 194 insertions, 44 deletions
diff --git a/cgit.c b/cgit.c
index 4b91829..6597529 100644
--- a/cgit.c
+++ b/cgit.c
@@ -68,8 +68,10 @@ static void cgit_print_repo_page(struct cacheitem *item)
 	setenv("GIT_DIR", cgit_repo->path, 1);
 
 	if ((cgit_cmd == CMD_SNAPSHOT) && cgit_repo->snapshots) {
-		cgit_print_snapshot(item, cgit_query_sha1, "zip",
-				    cgit_repo->url, cgit_query_name);
+		cgit_print_snapshot(item, cgit_query_sha1,
+				    cgit_repobasename(cgit_repo->url),
+				    cgit_query_name,
+				    cgit_repo->snapshots );
 		return;
 	}
 
diff --git a/cgit.css b/cgit.css
index 112dac1..43a40a3 100644
--- a/cgit.css
+++ b/cgit.css
@@ -231,6 +231,7 @@ table.commit-info th {
 	text-align: left;
 	font-weight: normal;
 	padding: 0.1em 1em 0.1em 0.1em;
+	vertical-align: top;
 }
 
 table.commit-info td {
diff --git a/cgit.h b/cgit.h
index 610a16d..eddcaa3 100644
--- a/cgit.h
+++ b/cgit.h
@@ -157,6 +157,7 @@ extern void cgit_querystring_cb(const char *name, const char *value);
 
 extern int chk_zero(int result, char *msg);
 extern int chk_positive(int result, char *msg);
+extern int chk_non_negative(int result, char *msg);
 
 extern int hextoint(char c);
 extern char *trim_end(const char *str, char c);
@@ -200,9 +201,13 @@ extern int cache_exist(struct cacheitem *item);
 extern int cache_expired(struct cacheitem *item);
 
 extern char *cgit_repourl(const char *reponame);
+extern char *cgit_fileurl(const char *reponame, const char *pagename,
+			  const char *filename, const char *query);
 extern char *cgit_pageurl(const char *reponame, const char *pagename,
 			  const char *query);
 
+extern const char *cgit_repobasename(const char *reponame);
+
 extern void cgit_tree_link(char *name, char *title, char *class, char *head,
 			   char *rev, char *path);
 extern void cgit_log_link(char *name, char *title, char *class, char *head,
@@ -233,7 +238,9 @@ extern void cgit_print_commit(char *hex);
 extern void cgit_print_tag(char *revname);
 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,
+				int snapshot);
+extern void cgit_print_snapshot_links(const char *repo, const char *hex,int snapshots);
+extern int cgit_parse_snapshots_mask(const char *str);
 
 #endif /* CGIT_H */
diff --git a/cgitrc b/cgitrc
index 40877f8..1040997 100644
--- a/cgitrc
+++ b/cgitrc
@@ -8,7 +8,8 @@
 #nocache=0
 
 
-## Enable/disable snapshots by default. This can be overridden per repo
+## Set allowed snapshot types by default. Can be overridden per repo
+# can be any combination of zip/tar.gz/tar.bz2/tar
 #snapshots=0
 
 
@@ -113,7 +114,7 @@
 #repo.desc=the caching cgi for git
 #repo.path=/pub/git/cgit
 #repo.owner=Lars Hjemli
-#repo.snapshots=1				# override a sitewide snapshot-setting
+#repo.snapshots=tar.bz2				# override a sitewide snapshot-setting
 #repo.enable-log-filecount=0			# override the default filecount setting
 #repo.enable-log-linecount=0			# override the default linecount setting
 #repo.module-link=/git/%s/commit/?id=%s		# override the standard module-link
diff --git a/shared.c b/shared.c
index 06693b0..077934f 100644
--- a/shared.c
+++ b/shared.c
@@ -86,6 +86,13 @@ int chk_positive(int result, char *msg)
 	return result;
 }
 
+int chk_non_negative(int result, char *msg)
+{
+    	if (result < 0)
+	    	die("%s: %s",msg, strerror(errno));
+	return result;
+}
+
 struct repoinfo *add_repo(const char *url)
 {
 	struct repoinfo *ret;
@@ -148,7 +155,7 @@ void cgit_global_config_cb(const char *name, const char *value)
 	else if (!strcmp(name, "nocache"))
 		cgit_nocache = atoi(value);
 	else if (!strcmp(name, "snapshots"))
-		cgit_snapshots = atoi(value);
+		cgit_snapshots = cgit_parse_snapshots_mask(value);
 	else if (!strcmp(name, "enable-index-links"))
 		cgit_enable_index_links = atoi(value);
 	else if (!strcmp(name, "enable-log-filecount"))
@@ -190,7 +197,7 @@ void cgit_global_config_cb(const char *name, const char *value)
 	else if (cgit_repo && !strcmp(name, "repo.defbranch"))
 		cgit_repo->defbranch = xstrdup(value);
 	else if (cgit_repo && !strcmp(name, "repo.snapshots"))
-		cgit_repo->snapshots = cgit_snapshots * atoi(value);
+		cgit_repo->snapshots = cgit_snapshots & cgit_parse_snapshots_mask(value); /* XXX: &? */
 	else if (cgit_repo && !strcmp(name, "repo.enable-log-filecount"))
 		cgit_repo->enable_log_filecount = cgit_enable_log_filecount * atoi(value);
 	else if (cgit_repo && !strcmp(name, "repo.enable-log-linecount"))
diff --git a/ui-commit.c b/ui-commit.c
index 2679b59..50e9e11 100644
--- a/ui-commit.c
+++ b/ui-commit.c
@@ -139,7 +139,6 @@ void cgit_print_commit(char *hex)
 	struct commitinfo *info;
 	struct commit_list *p;
 	unsigned char sha1[20];
-	char *filename;
 	char *tmp;
 	int i;
 
@@ -196,11 +195,9 @@ void cgit_print_commit(char *hex)
 		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,cgit_repo->snapshots);
+		html("</td></tr>");
 	}
 	html("</table>\n");
 	html("<div class='commit-subject'>");
diff --git a/ui-shared.c b/ui-shared.c
index fd71c12..ca2ee82 100644
--- a/ui-shared.c
+++ b/ui-shared.c
@@ -57,13 +57,13 @@ char *cgit_repourl(const char *reponame)
 	}
 }
 
-char *cgit_pageurl(const char *reponame, const char *pagename,
-		   const char *query)
+char *cgit_fileurl(const char *reponame, const char *pagename,
+		   const char *filename, const char *query)
 {
 	if (cgit_virtual_root) {
 		if (query)
-			return fmt("%s/%s/%s/?%s", cgit_virtual_root, reponame,
-				   pagename, query);
+			return fmt("%s/%s/%s/%s?%s", cgit_virtual_root, reponame,
+				   pagename, filename?filename:"", query);
 		else
 			return fmt("%s/%s/%s/", cgit_virtual_root, reponame,
 				   pagename);
@@ -75,6 +75,37 @@ char *cgit_pageurl(const char *reponame, const char *pagename,
 	}
 }
 
+char *cgit_pageurl(const char *reponame, const char *pagename,
+		   const char *query)
+{
+	return cgit_fileurl(reponame,pagename,0,query);
+}
+
+const char *cgit_repobasename(const char *reponame)
+{
+	/* I assume we don't need to store more than one repo basename */
+	static char rvbuf[1024];
+	int p;
+	const char *rv;
+	strncpy(rvbuf,reponame,sizeof(rvbuf));
+	if(rvbuf[sizeof(rvbuf)-1])
+		die("cgit_repobasename: truncated repository name '%s'", reponame);
+	p = strlen(rvbuf)-1;
+	/* strip trailing slashes */
+	while(p && rvbuf[p]=='/') rvbuf[p--]=0;
+	/* strip trailing .git */
+	if(p>=3 && !strncmp(&rvbuf[p-3],".git",4)) {
+		p -= 3; rvbuf[p--] = 0;
+	}
+	/* strip more trailing slashes if any */
+	while( p && rvbuf[p]=='/') rvbuf[p--]=0;
+	/* find last slash in the remaining string */
+	rv = strrchr(rvbuf,'/');
+	if(rv)
+		return ++rv;
+	return rvbuf;
+}
+
 char *cgit_currurl()
 {
 	if (!cgit_virtual_root)
@@ -392,3 +423,5 @@ void cgit_print_snapshot_start(const char *mimetype, const char *filename,
 					 ttl_seconds(item->ttl)));
 	html("\n");
 }
+
+/* vim:set sw=8: */
diff --git a/ui-snapshot.c b/ui-snapshot.c
index 2257d6b..d6be55b 100644
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -8,40 +8,138 @@
 
 #include "cgit.h"
 
-static void cgit_print_zip(struct cacheitem *item, const char *hex, 
-			   const char *prefix, const char *filename)
+static int write_compressed_tar_archive(struct archiver_args *args,const char *filter)
 {
-	struct archiver_args args;
-	struct commit *commit;
-	unsigned char sha1[20];
+	int rw[2];
+	pid_t gzpid;
+	int stdout2;
+	int status;
+	int rv;
 
-	if (get_sha1(hex, sha1)) {
-		cgit_print_error(fmt("Bad object id: %s", hex));
-		return;
+	stdout2 = chk_non_negative(dup(STDIN_FILENO), "Preserving STDOUT before compressing");
+	chk_zero(pipe(rw), "Opening pipe from compressor subprocess");
+	gzpid = chk_non_negative(fork(), "Forking compressor subprocess");
+	if(gzpid==0) {
+		/* child */
+		chk_zero(close(rw[1]), "Closing write end of pipe in child");
+		chk_zero(close(STDIN_FILENO), "Closing STDIN");
+		chk_non_negative(dup2(rw[0],STDIN_FILENO), "Redirecting compressor input to stdin");
+		execlp(filter,filter,NULL);
+		_exit(-1);
 	}
-	commit = lookup_commit_reference(sha1);
+	/* parent */
+	chk_zero(close(rw[0]), "Closing read end of pipe");
+	chk_non_negative(dup2(rw[1],STDOUT_FILENO), "Redirecting output to compressor");
+	
+	rv = write_tar_archive(args);
 
-	if (!commit) {
-		cgit_print_error(fmt("Not a commit reference: %s", hex));
-		return;
-	}
+	chk_zero(close(STDOUT_FILENO), "Closing STDOUT redirected to compressor");
+	chk_non_negative(dup2(stdout2,STDOUT_FILENO), "Restoring uncompressed STDOUT");
+	chk_zero(close(stdout2), "Closing uncompressed STDOUT");
+	chk_zero(close(rw[1]), "Closing write end of pipe in parent");
+	chk_positive(waitpid(gzpid,&status,0), "Waiting on compressor process");
+	if(! ( WIFEXITED(status) && WEXITSTATUS(status)==0 ) )
+		cgit_print_error("Failed to compress archive");
 
-	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);
+	return rv;
 }
 
+static int write_tar_gzip_archive(struct archiver_args *args)
+{
+	return write_compressed_tar_archive(args,"gzip");
+}
+static int write_tar_bzip2_archive(struct archiver_args *args)
+{
+	return write_compressed_tar_archive(args,"bzip2");
+}
+
+static const struct snapshot_archive_t {
+    	const char *suffix;
+	const char *mimetype;
+	write_archive_fn_t write_func;
+	int bit;
+}	snapshot_archives[] = {
+	{ ".zip", "application/x-zip", write_zip_archive, 0x1 },
+	{ ".tar.gz", "application/x-tar", write_tar_gzip_archive, 0x2 },
+	{ ".tar.bz2", "application/x-tar", write_tar_bzip2_archive, 0x4 },
+	{ ".tar", "application/x-tar", write_tar_archive, 0x8 }
+};
 
 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,
+			 int snapshots)
+{
+	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;
+		if(!(snapshots&sat->bit)) continue;
+		sl = strlen(sat->suffix);
+		if(fnl<sl || strcmp(&filename[fnl-sl],sat->suffix))
+			continue;
+
+		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(sat->mimetype, filename, item);
+		(*sat->write_func)(&args);
+		return;
+	}
+	cgit_print_error(fmt("Unsupported snapshot format: %s", filename));
+}
+
+void cgit_print_snapshot_links(const char *repo,const char *hex,int snapshots)
 {
-	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];
+		if(!(snapshots&sat->bit)) continue;
+		filename = fmt("%s-%s%s",cgit_repobasename(repo),hex,sat->suffix);
+		htmlf("<a href='%s'>%s</a><br/>",
+			cgit_fileurl(repo,"snapshot",filename,
+			    fmt("id=%s&amp;name=%s",hex,filename)), filename);
+	}
+}
+
+int cgit_parse_snapshots_mask(const char *str)
+{
+	static const char *delim = " \t,:/|;";
+	int f, tl, rv = 0;
+	/* favor legacy setting */
+	if(atoi(str)) return 1;
+	for(;;) {
+		str += strspn(str,delim);
+		tl = strcspn(str,delim);
+		if(!tl)
+			break;
+		for(f=0;f<(sizeof(snapshot_archives)/sizeof(*snapshot_archives));++f) {
+			const struct snapshot_archive_t* sat = &snapshot_archives[f];
+			if(! ( strncmp(sat->suffix,str,tl) && strncmp(sat->suffix+1,str,tl-1) ) ) {
+				rv |= sat->bit;
+				break;
+			}
+		}
+		str += tl;
+	}
+	return rv;
 }
+
+/* vim:set sw=8: */
diff --git a/ui-tree.c b/ui-tree.c
index c5d64ff..75ce449 100644
--- a/ui-tree.c
+++ b/ui-tree.c
@@ -32,6 +32,10 @@ static void print_object(const unsigned char *sha1, char *path)
 		return;
 	}
 
+	html(" blob: <a href='");
+	html_attr(cgit_pageurl(cgit_query_repo, "blob", fmt("id=%s", sha1_to_hex(sha1))));
+	htmlf("'>%s</a>",sha1_to_hex(sha1));
+
 	html("<table class='blob'>\n");
 	idx = 0;
 	start = 0;
-rw-r--r--	cgit.c	6
-rw-r--r--	cgit.css	1
-rw-r--r--	cgit.h	11
-rw-r--r--	cgitrc	5
-rw-r--r--	shared.c	11
-rw-r--r--	ui-commit.c	9
-rw-r--r--	ui-shared.c	41
-rw-r--r--	ui-snapshot.c	150
-rw-r--r--	ui-tree.c	4