Add support for --scan-tree=<path> option to cgit

[ps-cgit] / ui-snapshot.c

diff --git a/ui-snapshot.c b/ui-snapshot.c
index 2257d6b9e574171c185e76a5fc21b7aeb7826882..966a14007414f35d0e04f862a593c93ba26421b5 100644 (file)
--- a/ui-snapshot.c
+++ b/ui-snapshot.c
@@ -7,41 +7,108 @@
  */
 
 #include "cgit.h"
+#include "html.h"
+#include "ui-shared.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");
+}
+
+const struct cgit_snapshot_format cgit_snapshot_formats[] = {
+       { ".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 },
+       {}
+};
+
+static int make_snapshot(const struct cgit_snapshot_format *format,
+                        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)) {
+       if(get_sha1(hex, sha1)) {
                cgit_print_error(fmt("Bad object id: %s", hex));
-               return;
+               return 1;
        }
        commit = lookup_commit_reference(sha1);
-
-       if (!commit) {
+       if(!commit) {
                cgit_print_error(fmt("Not a commit reference: %s", hex));
-               return;
+               return 1;
        }
-
        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);
+       args.time = commit->date;
+       ctx.page.mimetype = xstrdup(format->mimetype);
+       ctx.page.filename = xstrdup(filename);
+       cgit_print_http_headers(&ctx);
+       format->write_func(&args);
+       return 0;
 }
 
-
-void cgit_print_snapshot(struct cacheitem *item, const char *hex, 
-                        const char *format, const char *prefix,
-                        const char *filename)
+void cgit_print_snapshot(const char *head, const char *hex, const char *prefix,
+                        const char *filename, int snapshots)
 {
-       if (!strcmp(format, "zip"))
-               cgit_print_zip(item, hex, prefix, filename);
-       else
-               cgit_print_error(fmt("Unsupported snapshot format: %s", 
-                                    format));
+       const struct cgit_snapshot_format* f;
+       int sl, fnl;
+
+       fnl = strlen(filename);
+       if (!hex)
+               hex = head;
+       for (f = cgit_snapshot_formats; f->suffix; f++) {
+               if (!(snapshots & f->bit))
+                       continue;
+               sl = strlen(f->suffix);
+               if(fnl < sl || strcmp(&filename[fnl-sl], f->suffix))
+                       continue;
+               make_snapshot(f, hex, prefix, filename);
+               return;
+       }
+       cgit_print_error(fmt("Unsupported snapshot format: %s", filename));
 }