Retire diff-helper.

The textual diff generation with built-in '-p' in diff-* brothers has
proven to be useful enough that git-diff-helper outlived its usefulness.

Signed-off-by: Junio C Hamano <junkio@cox.net>

3 files changed, 0 insertions, 169 deletions

diff --git a/t/t4000-diff-format.sh b/t/t4000-diff-format.sh
index 91015d76fc..f3b6330a9b 100755
--- a/t/t4000-diff-format.sh
+++ b/t/t4000-diff-format.sh
@@ -50,13 +50,4 @@ test_expect_success \
     'validate git-diff-files -p output.' \
     'cmp -s current expected'
 
-test_expect_success \
-    'build same diff using git-diff-helper.' \
-    'git-diff-files -z | git-diff-helper -z >current'
-
-
-test_expect_success \
-    'validate git-diff-helper output.' \
-    'cmp -s current expected'
-
 test_done
diff --git a/t/t4005-diff-rename-2.sh b/t/t4005-diff-rename-2.sh
index 5636f4f2cd..684fd23a41 100755
--- a/t/t4005-diff-rename-2.sh
+++ b/t/t4005-diff-rename-2.sh
@@ -40,38 +40,6 @@ test_expect_success \
     'validate output from rename/copy detection (#1)' \
     'compare_diff_raw current expected'
 
-# make sure diff-helper can grok it.
-mv expected diff-raw
-GIT_DIFF_OPTS=--unified=0 git-diff-helper <diff-raw >current
-cat >expected <<\EOF
-diff --git a/COPYING b/COPYING.1
-copy from COPYING
-copy to COPYING.1
---- a/COPYING
-+++ b/COPYING.1
-@@ -6 +6 @@
-- HOWEVER, in order to allow a migration to GPLv3 if that seems like
-+ However, in order to allow a migration to GPLv3 if that seems like
-diff --git a/COPYING b/COPYING.2
-rename from COPYING
-rename to COPYING.2
---- a/COPYING
-+++ b/COPYING.2
-@@ -2 +2 @@
-- Note that the only valid version of the GPL as far as this project
-+ Note that the only valid version of the G.P.L as far as this project
-@@ -6 +6 @@
-- HOWEVER, in order to allow a migration to GPLv3 if that seems like
-+ HOWEVER, in order to allow a migration to G.P.Lv3 if that seems like
-@@ -12 +12 @@
--	This file is licensed under the GPL v2, or a later version
-+	This file is licensed under the G.P.L v2, or a later version
-EOF
-
-test_expect_success \
-    'validate output from diff-helper (#1)' \
-    'compare_diff_patch current expected'
-
 ################################################################
 
 test_expect_success \
@@ -94,36 +62,6 @@ test_expect_success \
     'validate output from rename/copy detection (#2)' \
     'compare_diff_raw current expected'
 
-# make sure diff-helper can grok it.
-mv expected diff-raw
-GIT_DIFF_OPTS=--unified=0 git-diff-helper <diff-raw >current
-cat >expected <<\EOF
-diff --git a/COPYING b/COPYING
---- a/COPYING
-+++ b/COPYING
-@@ -2 +2 @@
-- Note that the only valid version of the GPL as far as this project
-+ Note that the only valid version of the G.P.L as far as this project
-@@ -6 +6 @@
-- HOWEVER, in order to allow a migration to GPLv3 if that seems like
-+ HOWEVER, in order to allow a migration to G.P.Lv3 if that seems like
-@@ -12 +12 @@
--	This file is licensed under the GPL v2, or a later version
-+	This file is licensed under the G.P.L v2, or a later version
-diff --git a/COPYING b/COPYING.1
-copy from COPYING
-copy to COPYING.1
---- a/COPYING
-+++ b/COPYING.1
-@@ -6 +6 @@
-- HOWEVER, in order to allow a migration to GPLv3 if that seems like
-+ However, in order to allow a migration to GPLv3 if that seems like
-EOF
-
-test_expect_success \
-    'validate output from diff-helper (#2)' \
-    'compare_diff_patch current expected'
-
 ################################################################
 
 # tree has COPYING and rezrov.  work tree has the same COPYING and
@@ -145,22 +83,4 @@ test_expect_success \
     'validate output from rename/copy detection (#3)' \
     'compare_diff_raw current expected'
 
-# make sure diff-helper can grok it.
-mv expected diff-raw
-GIT_DIFF_OPTS=--unified=0 git-diff-helper <diff-raw >current
-cat >expected <<\EOF
-diff --git a/COPYING b/COPYING.1
-copy from COPYING
-copy to COPYING.1
---- a/COPYING
-+++ b/COPYING.1
-@@ -6 +6 @@
-- HOWEVER, in order to allow a migration to GPLv3 if that seems like
-+ However, in order to allow a migration to GPLv3 if that seems like
-EOF
-
-test_expect_success \
-    'validate output from diff-helper (#3)' \
-    'compare_diff_patch current expected'
-
 test_done
diff --git a/t/t4009-diff-rename-4.sh b/t/t4009-diff-rename-4.sh
index ea811529cc..2f2f8b1216 100755
--- a/t/t4009-diff-rename-4.sh
+++ b/t/t4009-diff-rename-4.sh
@@ -44,38 +44,6 @@ test_expect_success \
     'validate output from rename/copy detection (#1)' \
     'compare_diff_raw_z current expected'
 
-# make sure diff-helper can grok it.
-mv current diff-raw
-GIT_DIFF_OPTS=--unified=0 git-diff-helper -z <diff-raw >current
-cat >expected <<\EOF
-diff --git a/COPYING b/COPYING.1
-copy from COPYING
-copy to COPYING.1
---- a/COPYING
-+++ b/COPYING.1
-@@ -6 +6 @@
-- HOWEVER, in order to allow a migration to GPLv3 if that seems like
-+ However, in order to allow a migration to GPLv3 if that seems like
-diff --git a/COPYING b/COPYING.2
-rename from COPYING
-rename to COPYING.2
---- a/COPYING
-+++ b/COPYING.2
-@@ -2 +2 @@
-- Note that the only valid version of the GPL as far as this project
-+ Note that the only valid version of the G.P.L as far as this project
-@@ -6 +6 @@
-- HOWEVER, in order to allow a migration to GPLv3 if that seems like
-+ HOWEVER, in order to allow a migration to G.P.Lv3 if that seems like
-@@ -12 +12 @@
--	This file is licensed under the GPL v2, or a later version
-+	This file is licensed under the G.P.L v2, or a later version
-EOF
-
-test_expect_success \
-    'validate output from diff-helper (#1)' \
-    'compare_diff_patch current expected'
-
 ################################################################
 
 test_expect_success \
@@ -101,36 +69,6 @@ test_expect_success \
     'validate output from rename/copy detection (#2)' \
     'compare_diff_raw_z current expected'
 
-# make sure diff-helper can grok it.
-mv current diff-raw
-GIT_DIFF_OPTS=--unified=0 git-diff-helper -z <diff-raw >current
-cat >expected <<\EOF
-diff --git a/COPYING b/COPYING
---- a/COPYING
-+++ b/COPYING
-@@ -2 +2 @@
-- Note that the only valid version of the GPL as far as this project
-+ Note that the only valid version of the G.P.L as far as this project
-@@ -6 +6 @@
-- HOWEVER, in order to allow a migration to GPLv3 if that seems like
-+ HOWEVER, in order to allow a migration to G.P.Lv3 if that seems like
-@@ -12 +12 @@
--	This file is licensed under the GPL v2, or a later version
-+	This file is licensed under the G.P.L v2, or a later version
-diff --git a/COPYING b/COPYING.1
-copy from COPYING
-copy to COPYING.1
---- a/COPYING
-+++ b/COPYING.1
-@@ -6 +6 @@
-- HOWEVER, in order to allow a migration to GPLv3 if that seems like
-+ However, in order to allow a migration to GPLv3 if that seems like
-EOF
-
-test_expect_success \
-    'validate output from diff-helper (#2)' \
-    'compare_diff_patch current expected'
-
 ################################################################
 
 # tree has COPYING and rezrov.  work tree has the same COPYING and
@@ -154,22 +92,4 @@ test_expect_success \
     'validate output from rename/copy detection (#3)' \
     'compare_diff_raw_z current expected'
 
-# make sure diff-helper can grok it.
-mv current diff-raw
-GIT_DIFF_OPTS=--unified=0 git-diff-helper -z <diff-raw >current
-cat >expected <<\EOF
-diff --git a/COPYING b/COPYING.1
-copy from COPYING
-copy to COPYING.1
---- a/COPYING
-+++ b/COPYING.1
-@@ -6 +6 @@
-- HOWEVER, in order to allow a migration to GPLv3 if that seems like
-+ However, in order to allow a migration to GPLv3 if that seems like
-EOF
-
-test_expect_success \
-    'validate output from diff-helper (#3)' \
-    'compare_diff_patch current expected'
-
 test_done