trivial: use git-repo-config to detect how to run tests in the test repository

diff --git a/t/t0000-basic.sh b/t/t0000-basic.sh
index bd940bd09b3df6ff6cecae4fa8a9db739ef000e4..bc3e711a525f164f21132438d4d4e12e3dc10698 100755 (executable)
--- a/t/t0000-basic.sh
+++ b/t/t0000-basic.sh
@@ -17,8 +17,37 @@ IDs.  When object ID computation changes, like in the previous case of
 swapping compression and hashing order, the person who is making the
 modification *should* take notice and update the test vectors here.
 '
+
+################################################################
+# It appears that people are getting bitten by not installing
+# 'merge' (usually part of RCS package in binary distributions)
+# or have too old python without subprocess.  Check them and error
+# out before running any tests.  Also catch the bogosity of trying
+# to run tests without building while we are at it.
+
+../git >/dev/null
+if test $? != 1
+then
+       echo >&2 'You do not seem to have built git yet.'
+       exit 1
+fi
+
+merge >/dev/null 2>/dev/null
+if test $? == 127
+then
+       echo >&2 'You do not seem to have "merge" installed.
+Please check INSTALL document.'
+       exit 1
+fi
+
 . ./test-lib.sh
 
+"$PYTHON" -c 'import subprocess' || {
+       echo >&2 'Your python seem to lack "subprocess" module.
+Please check INSTALL document.'
+       exit 1
+}
+
 ################################################################
 # init-db has been done in an empty repository.
 # make sure it is empty.
@@ -28,12 +57,12 @@ test_expect_success \
     '.git/objects should be empty after git-init-db in an empty repo.' \
     'cmp -s /dev/null should-be-empty' 
 
-# also it should have 258 subdirectories; 256 fan-out, pack, and info.
-# 259 is counting "objects" itself
+# also it should have 2 subdirectories; no fan-out anymore, pack, and info.
+# 3 is counting "objects" itself
 find .git/objects -type d -print >full-of-directories
 test_expect_success \
-    '.git/objects should have 258 subdirectories.' \
-    'test $(wc -l < full-of-directories) = 259'
+    '.git/objects should have 3 subdirectories.' \
+    'test $(wc -l < full-of-directories) = 3'
 
 ################################################################
 # Basics of the basics
@@ -126,19 +155,18 @@ test_expect_success \
     'git-ls-tree output for a known tree.' \
     'diff current expected'
 
+# This changed in ls-tree pathspec change -- recursive does
+# not show tree nodes anymore.
 test_expect_success \
     'showing tree with git-ls-tree -r' \
     'git-ls-tree -r $tree >current'
 cat >expected <<\EOF
 100644 blob f87290f8eb2cbbea7857214459a0739927eab154   path0
 120000 blob 15a98433ae33114b085f3eb3bb03b832b3180a01   path0sym
-040000 tree 58a09c23e2ca152193f2786e06986b7b6712bdbe   path2
 100644 blob 3feff949ed00a62d9f7af97c15cd8a30595e7ac7   path2/file2
 120000 blob d8ce161addc5173867a3c3c730924388daedbc38   path2/file2sym
-040000 tree 21ae8269cacbe57ae09138dcc3a2887f904d02b3   path3
 100644 blob 0aa34cae68d0878578ad119c86ca2b5ed5b28376   path3/file3
 120000 blob 8599103969b43aff7e430efea79ca4636466794f   path3/file3sym
-040000 tree 3c5e5399f3a333eddecce7a9b9465b63f65f51e2   path3/subp3
 100644 blob 00fb5908cb97c2564a9783c0c64087333b3b464f   path3/subp3/file3
 120000 blob 6649a1ebe9e9f1c553b66f5a6e74136a07ccc57c   path3/subp3/file3sym
 EOF