Merge branch 'jk/t5000-gzip-simplify'

Test fix.

* jk/t5000-gzip-simplify:
t5000: simplify gzip prerequisite checks

diff --combined t/t5000-tar-tree.sh
index 11bf0b8bda9998d1f533d2d28c5b7d468657ae24,519cc34be2b4ebe3858c6f055984716807eba5ef..05f011d38eeaf16e2be8caace5bca697b7a9daf3
--- 1/t/t5000-tar-tree.sh
--- 2/t/t5000-tar-tree.sh
+++ b/t/t5000-tar-tree.sh
@@@ -3,7 -3,7 +3,7 @@@
  # Copyright (C) 2005 Rene Scharfe
  #
  
 -test_description='git tar-tree and git get-tar-commit-id test
 +test_description='git archive and git get-tar-commit-id test
  
  This test covers the topics of file contents, commit date handling and
  commit id embedding:
@@@ -13,11 -13,11 +13,11 @@@
    binary file (/bin/sh).  Only paths shorter than 99 characters are
    used.
  
 -  git tar-tree applies the commit date to every file in the archive it
 +  git archive applies the commit date to every file in the archive it
    creates.  The test sets the commit date to a specific value and checks
    if the tar archive contains that value.
  
 -  When giving git tar-tree a commit id (in contrast to a tree id) it
 +  When giving git archive a commit id (in contrast to a tree id) it
    embeds this commit id into the tar archive as a comment.  The test
    checks the ability of git get-tar-commit-id to figure it out from the
    tar file.
@@@ -25,8 -25,6 +25,6 @@@
  '
  
  . ./test-lib.sh
- GZIP=${GZIP:-gzip}
- GUNZIP=${GUNZIP:-gzip -d}
  
  SUBSTFORMAT=%H%n
  
@@@ -39,6 -37,8 +37,8 @@@ test_lazy_prereq TAR_NEEDS_PAX_FALLBAC
        )
  '
  
+ test_lazy_prereq GZIP 'gzip --version'
+ 
  get_pax_header() {
        file=$1
        header=$2=
@@@ -196,6 -196,16 +196,6 @@@ test_expect_success 
      'git get-tar-commit-id <b.tar >b.commitid &&
       test_cmp .git/$(git symbolic-ref HEAD) b.commitid'
  
 -test_expect_success 'git tar-tree' '
 -      git tar-tree HEAD >tar-tree.tar &&
 -      test_cmp b.tar tar-tree.tar
 -'
 -
 -test_expect_success 'git tar-tree with prefix' '
 -      git tar-tree HEAD prefix >tar-tree_with_prefix.tar &&
 -      test_cmp with_prefix.tar tar-tree_with_prefix.tar
 -'
 -
  test_expect_success 'git archive with --output, override inferred format' '
        git archive --format=tar --output=d4.zip HEAD &&
        test_cmp b.tar d4.zip
@@@ -265,12 -275,6 +265,6 @@@ test_expect_success 'only enabled filte
        test_cmp remote.bar config.bar
  '
  
- 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
  '
@@@ -290,14 -294,8 +284,8 @@@ test_expect_success GZIP 'infer tgz fro
        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_expect_success GZIP 'extract tgz file' '
+       gzip -d -c <j.tgz >j.tar &&
        test_cmp b.tar j.tar
  '