1 files changed, 111 insertions, 13 deletions

diff --git a/ui-snapshot.c b/ui-snapshot.c
index 2257d6b..d6be55b 100644
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -8,9 +8,77 @@
 
 #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)
 {
+        int rw[2];
+        pid_t gzpid;
+        int stdout2;
+        int status;
+        int rv;
+
+        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);
+        }
+        /* 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);
+
+        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");
+
+        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 *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];
@@ -23,25 +91,55 @@ static void cgit_print_zip(struct cacheitem *item, const char *hex,
 
         if (!commit) {
                 cgit_print_error(fmt("Not a commit reference: %s", hex));
-                return;
+                        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_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)
+{
+            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);
+        }
+}
 
-void cgit_print_snapshot(struct cacheitem *item, const char *hex, 
-                         const char *format, const char *prefix,
-                         const char *filename)
+int cgit_parse_snapshots_mask(const char *str)
 {
-        if (!strcmp(format, "zip"))
-                cgit_print_zip(item, hex, prefix, filename);
-        else
-                cgit_print_error(fmt("Unsupported snapshot format: %s", 
-                                     format));
+        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: */