Merge branch 'master' (early part) into pd/bash-4-completion

* 'master' (early part): (529 commits)
  completion: fix zsh check under bash with 'set -u'
  Fix copy-pasted comments related to tree diff handling.
  Git 1.7.3.2
  {cvs,svn}import: use the new 'git read-tree --empty'
  t/t9001-send-email.sh: fix stderr redirection in 'Invalid In-Reply-To'
  Clarify and extend the "git diff" format documentation
  git-show-ref.txt: clarify the pattern matching
  documentation: git-config minor cleanups
  Update test script annotate-tests.sh to handle missing/extra authors
  Better advice on using topic branches for kernel development
  Documentation: update implicit "--no-index" behavior in "git diff"
  Documentation: expand 'git diff' SEE ALSO section
  Documentation: diff can compare blobs
  Documentation: gitrevisions is in section 7
  fast-import: Allow filemodify to set the root
  shell portability: no "export VAR=VAL"
  CodingGuidelines: reword parameter expansion section
  Documentation: update-index: -z applies also to --index-info
  gitweb: Improve behavior for actionless path_info gitweb URLs
  gitweb: Fix bug in evaluate_path_info
  ...

Conflicts:
	GIT-VERSION-GEN
	RelNotes
	contrib/completion/git-completion.bash

1 files changed, 138 insertions, 38 deletions

diff --git a/t/test-lib.sh b/t/test-lib.sh
index 29fd7209cf..2af8f10c83 100644
--- a/t/test-lib.sh
+++ b/t/test-lib.sh
@@ -331,12 +331,35 @@ test_set_prereq () {
 satisfied=" "
 
 test_have_prereq () {
-	case $satisfied in
-	*" $1 "*)
-		: yes, have it ;;
-	*)
-		! : nope ;;
-	esac
+	# prerequisites can be concatenated with ','
+	save_IFS=$IFS
+	IFS=,
+	set -- $*
+	IFS=$save_IFS
+
+	total_prereq=0
+	ok_prereq=0
+	missing_prereq=
+
+	for prerequisite
+	do
+		total_prereq=$(($total_prereq + 1))
+		case $satisfied in
+		*" $prerequisite "*)
+			ok_prereq=$(($ok_prereq + 1))
+			;;
+		*)
+			# Keep a list of missing prerequisites
+			if test -z "$missing_prereq"
+			then
+				missing_prereq=$prerequisite
+			else
+				missing_prereq="$prerequisite,$missing_prereq"
+			fi
+		esac
+	done
+
+	test $total_prereq = $ok_prereq
 }
 
 # You are not expected to call test_ok_ and test_failure_ directly, use
@@ -398,8 +421,14 @@ test_skip () {
 	fi
 	case "$to_skip" in
 	t)
+		of_prereq=
+		if test "$missing_prereq" != "$prereq"
+		then
+			of_prereq=" of $prereq"
+		fi
+
 		say_color skip >&3 "skipping test: $@"
-		say_color skip "ok $test_count # skip $1"
+		say_color skip "ok $test_count # skip $1 (missing $missing_prereq${of_prereq})"
 		: true
 		;;
 	*)
@@ -545,6 +574,38 @@ test_external_without_stderr () {
 	fi
 }
 
+# debugging-friendly alternatives to "test [-f|-d|-e]"
+# The commands test the existence or non-existence of $1. $2 can be
+# given to provide a more precise diagnosis.
+test_path_is_file () {
+	if ! [ -f "$1" ]
+	then
+		echo "File $1 doesn't exist. $*"
+		false
+	fi
+}
+
+test_path_is_dir () {
+	if ! [ -d "$1" ]
+	then
+		echo "Directory $1 doesn't exist. $*"
+		false
+	fi
+}
+
+test_path_is_missing () {
+	if [ -e "$1" ]
+	then
+		echo "Path exists:"
+		ls -ld "$1"
+		if [ $# -ge 1 ]; then
+			echo "$*"
+		fi
+		false
+	fi
+}
+
+
 # This is not among top-level (test_expect_success | test_expect_failure)
 # but is a prefix that can be used in the test script, like:
 #
@@ -559,7 +620,18 @@ test_external_without_stderr () {
 
 test_must_fail () {
 	"$@"
-	test $? -gt 0 -a $? -le 129 -o $? -gt 192
+	exit_code=$?
+	if test $exit_code = 0; then
+		echo >&2 "test_must_fail: command succeeded: $*"
+		return 1
+	elif test $exit_code -gt 129 -a $exit_code -le 192; then
+		echo >&2 "test_must_fail: died by signal: $*"
+		return 1
+	elif test $exit_code = 127; then
+		echo >&2 "test_must_fail: command not found: $*"
+		return 1
+	fi
+	return 0
 }
 
 # Similar to test_must_fail, but tolerates success, too.  This is
@@ -575,7 +647,15 @@ test_must_fail () {
 
 test_might_fail () {
 	"$@"
-	test $? -ge 0 -a $? -le 129 -o $? -gt 192
+	exit_code=$?
+	if test $exit_code -gt 129 -a $exit_code -le 192; then
+		echo >&2 "test_might_fail: died by signal: $*"
+		return 1
+	elif test $exit_code = 127; then
+		echo >&2 "test_might_fail: command not found: $*"
+		return 1
+	fi
+	return 0
 }
 
 # test_cmp is a helper function to compare actual and expected output.
@@ -625,28 +705,31 @@ test_when_finished () {
 test_create_repo () {
 	test "$#" = 1 ||
 	error "bug in the test script: not 1 parameter to test-create-repo"
-	owd=`pwd`
 	repo="$1"
 	mkdir -p "$repo"
-	cd "$repo" || error "Cannot setup test environment"
-	"$GIT_EXEC_PATH/git-init" "--template=$TEST_DIRECTORY/../templates/blt/" >&3 2>&4 ||
-	error "cannot run git init -- have you built things yet?"
-	mv .git/hooks .git/hooks-disabled
-	cd "$owd"
+	(
+		cd "$repo" || error "Cannot setup test environment"
+		"$GIT_EXEC_PATH/git-init" "--template=$GIT_BUILD_DIR/templates/blt/" >&3 2>&4 ||
+		error "cannot run git init -- have you built things yet?"
+		mv .git/hooks .git/hooks-disabled
+	) || exit
 }
 
 test_done () {
 	GIT_EXIT_OK=t
-	test_results_dir="$TEST_DIRECTORY/test-results"
-	mkdir -p "$test_results_dir"
-	test_results_path="$test_results_dir/${0%.sh}-$$.counts"
 
-	echo "total $test_count" >> $test_results_path
-	echo "success $test_success" >> $test_results_path
-	echo "fixed $test_fixed" >> $test_results_path
-	echo "broken $test_broken" >> $test_results_path
-	echo "failed $test_failure" >> $test_results_path
-	echo "" >> $test_results_path
+	if test -z "$HARNESS_ACTIVE"; then
+		test_results_dir="$TEST_DIRECTORY/test-results"
+		mkdir -p "$test_results_dir"
+		test_results_path="$test_results_dir/${0%.sh}-$$.counts"
+
+		echo "total $test_count" >> $test_results_path
+		echo "success $test_success" >> $test_results_path
+		echo "fixed $test_fixed" >> $test_results_path
+		echo "broken $test_broken" >> $test_results_path
+		echo "failed $test_failure" >> $test_results_path
+		echo "" >> $test_results_path
+	fi
 
 	if test "$test_fixed" != 0
 	then
@@ -688,7 +771,15 @@ test_done () {
 
 # Test the binaries we have just built.  The tests are kept in
 # t/ subdirectory and are run in 'trash directory' subdirectory.
-TEST_DIRECTORY=$(pwd)
+if test -z "$TEST_DIRECTORY"
+then
+	# We allow tests to override this, in case they want to run tests
+	# outside of t/, e.g. for running tests on the test library
+	# itself.
+	TEST_DIRECTORY=$(pwd)
+fi
+GIT_BUILD_DIR="$TEST_DIRECTORY"/..
+
 if test -n "$valgrind"
 then
 	make_symlink () {
@@ -715,7 +806,7 @@ then
 		test -x "$1" || return
 
 		base=$(basename "$1")
-		symlink_target=$TEST_DIRECTORY/../$base
+		symlink_target=$GIT_BUILD_DIR/$base
 		# do not override scripts
 		if test -x "$symlink_target" &&
 		    test ! -d "$symlink_target" &&
@@ -734,7 +825,7 @@ then
 	# override all git executables in TEST_DIRECTORY/..
 	GIT_VALGRIND=$TEST_DIRECTORY/valgrind
 	mkdir -p "$GIT_VALGRIND"/bin
-	for file in $TEST_DIRECTORY/../git* $TEST_DIRECTORY/../test-*
+	for file in $GIT_BUILD_DIR/git* $GIT_BUILD_DIR/test-*
 	do
 		make_valgrind_symlink $file
 	done
@@ -755,10 +846,10 @@ then
 elif test -n "$GIT_TEST_INSTALLED" ; then
 	GIT_EXEC_PATH=$($GIT_TEST_INSTALLED/git --exec-path)  ||
 	error "Cannot run git from $GIT_TEST_INSTALLED."
-	PATH=$GIT_TEST_INSTALLED:$TEST_DIRECTORY/..:$PATH
+	PATH=$GIT_TEST_INSTALLED:$GIT_BUILD_DIR:$PATH
 	GIT_EXEC_PATH=${GIT_TEST_EXEC_PATH:-$GIT_EXEC_PATH}
 else # normal case, use ../bin-wrappers only unless $with_dashes:
-	git_bin_dir="$TEST_DIRECTORY/../bin-wrappers"
+	git_bin_dir="$GIT_BUILD_DIR/bin-wrappers"
 	if ! test -x "$git_bin_dir/git" ; then
 		if test -z "$with_dashes" ; then
 			say "$git_bin_dir/git is not executable; using GIT_EXEC_PATH"
@@ -766,18 +857,18 @@ else # normal case, use ../bin-wrappers only unless $with_dashes:
 		with_dashes=t
 	fi
 	PATH="$git_bin_dir:$PATH"
-	GIT_EXEC_PATH=$TEST_DIRECTORY/..
+	GIT_EXEC_PATH=$GIT_BUILD_DIR
 	if test -n "$with_dashes" ; then
-		PATH="$TEST_DIRECTORY/..:$PATH"
+		PATH="$GIT_BUILD_DIR:$PATH"
 	fi
 fi
-GIT_TEMPLATE_DIR=$(pwd)/../templates/blt
+GIT_TEMPLATE_DIR="$GIT_BUILD_DIR"/templates/blt
 unset GIT_CONFIG
 GIT_CONFIG_NOSYSTEM=1
 GIT_CONFIG_NOGLOBAL=1
 export PATH GIT_EXEC_PATH GIT_TEMPLATE_DIR GIT_CONFIG_NOSYSTEM GIT_CONFIG_NOGLOBAL
 
-. ../GIT-BUILD-OPTIONS
+. "$GIT_BUILD_DIR"/GIT-BUILD-OPTIONS
 
 if test -z "$GIT_TEST_CMP"
 then
@@ -789,22 +880,22 @@ then
 	fi
 fi
 
-GITPERLLIB=$(pwd)/../perl/blib/lib:$(pwd)/../perl/blib/arch/auto/Git
+GITPERLLIB="$GIT_BUILD_DIR"/perl/blib/lib:"$GIT_BUILD_DIR"/perl/blib/arch/auto/Git
 export GITPERLLIB
-test -d ../templates/blt || {
+test -d "$GIT_BUILD_DIR"/templates/blt || {
 	error "You haven't built things yet, have you?"
 }
 
 if test -z "$GIT_TEST_INSTALLED" && test -z "$NO_PYTHON"
 then
-	GITPYTHONLIB="$(pwd)/../git_remote_helpers/build/lib"
+	GITPYTHONLIB="$GIT_BUILD_DIR/git_remote_helpers/build/lib"
 	export GITPYTHONLIB
-	test -d ../git_remote_helpers/build || {
+	test -d "$GIT_BUILD_DIR"/git_remote_helpers/build || {
 		error "You haven't built git_remote_helpers yet, have you?"
 	}
 fi
 
-if ! test -x ../test-chmtime; then
+if ! test -x "$GIT_BUILD_DIR"/test-chmtime; then
 	echo >&2 'You need to build test-chmtime:'
 	echo >&2 'Run "make test-chmtime" in the source (toplevel) directory'
 	exit 1
@@ -829,6 +920,9 @@ test_create_repo "$test"
 # in subprocesses like git equals our $PWD (for pathname comparisons).
 cd -P "$test" || exit 1
 
+HOME=$(pwd)
+export HOME
+
 this_test=${0##*/}
 this_test=${this_test%%-*}
 for skp in $GIT_SKIP_TESTS
@@ -876,11 +970,13 @@ case $(uname -s) in
 	# no POSIX permissions
 	# backslashes in pathspec are converted to '/'
 	# exec does not inherit the PID
+	test_set_prereq MINGW
 	;;
 *)
 	test_set_prereq POSIXPERM
 	test_set_prereq BSLASHPSPEC
 	test_set_prereq EXECKEEPSPID
+	test_set_prereq NOT_MINGW
 	;;
 esac
 
@@ -890,3 +986,7 @@ test -z "$NO_PYTHON" && test_set_prereq PYTHON
 # test whether the filesystem supports symbolic links
 ln -s x y 2>/dev/null && test -h y 2>/dev/null && test_set_prereq SYMLINKS
 rm -f y
+
+# When the tests are run as root, permission tests will report that
+# things are writable when they shouldn't be.
+test -w / || test_set_prereq SANITY