ui-snapshot: add support for lzip compression

This patch adds support for lzip [1] compressed snapshots (*.tar.lz)

[1] https://www.nongnu.org/lzip/

Signed-off-by: Hanspeter Portner <dev@open-music-kontrollers.ch>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

4 files changed, 52 insertions, 3 deletions

@@ -407,8 +407,8 @@ side-by-side-diffs::
 snapshots::
         Text which specifies the default set of snapshot formats that cgit
         generates links for. The value is a space-separated list of zero or
-        more of the values "tar", "tar.gz", "tar.bz2", "tar.xz" and "zip".
-        The special value "all" enables all snapshot formats.
+        more of the values "tar", "tar.gz", "tar.bz2", "tar.xz", "tar.lz" and
+        "zip". The special value "all" enables all snapshot formats.
         Default value: none.
 
 source-filter::
@@ -104,7 +104,7 @@ virtual-root=/
 cache-root=$PWD/cache
 
 cache-size=1021
-snapshots=tar.gz tar.bz zip
+snapshots=tar.gz tar.bz tar.lz zip
 enable-log-filecount=1
 enable-log-linecount=1
 summary-log=5
@@ -38,6 +38,48 @@ test_expect_success 'verify untarred file-5' '
         test_line_count = 1 master/file-5
 '
 
+if test -n "$(which lzip 2>/dev/null)"; then
+        test_set_prereq LZIP
+else
+        say 'Skipping LZIP validation tests: lzip not found'
+fi
+
+test_expect_success LZIP 'get foo/snapshot/master.tar.lz' '
+        cgit_url "foo/snapshot/master.tar.lz" >tmp
+'
+
+test_expect_success LZIP 'check html headers' '
+        head -n 1 tmp |
+        grep "Content-Type: application/x-lzip" &&
+
+        head -n 2 tmp |
+        grep "Content-Disposition: inline; filename=.master.tar.lz."
+'
+
+test_expect_success LZIP 'strip off the header lines' '
+        strip_headers <tmp >master.tar.lz
+'
+
+test_expect_success LZIP 'verify lzip format' '
+        lzip --test master.tar.lz &&
+        cp master.tar.lz /tmp/.
+'
+
+test_expect_success LZIP 'untar' '
+        rm -rf master &&
+        tar --lzip -xf master.tar.lz
+'
+
+test_expect_success LZIP 'count files' '
+        ls master/ >output &&
+        test_line_count = 5 output
+'
+
+test_expect_success LZIP 'verify untarred file-5' '
+        grep "^5$" master/file-5 &&
+        test_line_count = 1 master/file-5
+'
+
 test_expect_success 'get foo/snapshot/master.zip' '
         cgit_url "foo/snapshot/master.zip" >tmp
 '
@@ -79,6 +79,12 @@ static int write_tar_bzip2_archive(const char *hex, const char *prefix)
         return write_compressed_tar_archive(hex, prefix, argv);
 }
 
+static int write_tar_lzip_archive(const char *hex, const char *prefix)
+{
+        char *argv[] = { "lzip", NULL };
+        return write_compressed_tar_archive(hex, prefix, argv);
+}
+
 static int write_tar_xz_archive(const char *hex, const char *prefix)
 {
         char *argv[] = { "xz", NULL };
@@ -90,6 +96,7 @@ const struct cgit_snapshot_format cgit_snapshot_formats[] = {
         { ".tar",       "application/x-tar",    write_tar_archive       },
         { ".tar.gz",    "application/x-gzip",   write_tar_gzip_archive  },
         { ".tar.bz2",   "application/x-bzip2",  write_tar_bzip2_archive },
+        { ".tar.lz",    "application/x-lzip",   write_tar_lzip_archive  },
         { ".tar.xz",    "application/x-xz",     write_tar_xz_archive    },
         { ".zip",       "application/x-zip",    write_zip_archive       },
         { NULL }