archive: provide builtin .tar.gz filter

diff --git a/t/t5000-tar-tree.sh b/t/t5000-tar-tree.sh
index 1f9069213aacb80fcf29fc87d89cefee7ae40fef..070250ebb0cb2b59560e63a56847dcd947b0d54a 100755 (executable)
--- a/t/t5000-tar-tree.sh
+++ b/t/t5000-tar-tree.sh
@@ -26,6 +26,8 @@ commit id embedding:
 
 . ./test-lib.sh
 UNZIP=${UNZIP:-unzip}
+GZIP=${GZIP:-gzip}
+GUNZIP=${GUNZIP:-gzip -d}
 
 SUBSTFORMAT=%H%n
 
@@ -295,4 +297,40 @@ test_expect_success 'extension matching requires dot' '
        test_cmp b.tar config-implicittar.foo
 '
 
+if $GZIP --version >/dev/null 2>&1; then
+       test_set_prereq GZIP
+else
+       say "Skipping some tar.gz tests because gzip not found"
+fi
+
+test_expect_success GZIP 'git archive --format=tgz' '
+       git archive --format=tgz HEAD >j.tgz
+'
+
+test_expect_success GZIP 'git archive --format=tar.gz' '
+       git archive --format=tar.gz HEAD >j1.tar.gz &&
+       test_cmp j.tgz j1.tar.gz
+'
+
+test_expect_success GZIP 'infer tgz from .tgz filename' '
+       git archive --output=j2.tgz HEAD &&
+       test_cmp j.tgz j2.tgz
+'
+
+test_expect_success GZIP 'infer tgz from .tar.gz filename' '
+       git archive --output=j3.tar.gz HEAD &&
+       test_cmp j.tgz j3.tar.gz
+'
+
+if $GUNZIP --version >/dev/null 2>&1; then
+       test_set_prereq GUNZIP
+else
+       say "Skipping some tar.gz tests because gunzip was not found"
+fi
+
+test_expect_success GZIP,GUNZIP 'extract tgz file' '
+       $GUNZIP -c <j.tgz >j.tar &&
+       test_cmp b.tar j.tar
+'
+
 test_done