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-rwxr-xr-xthird_party/git/t/perf/p7519-fsmonitor.sh183
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diff --git a/third_party/git/t/perf/p7519-fsmonitor.sh b/third_party/git/t/perf/p7519-fsmonitor.sh
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--- a/third_party/git/t/perf/p7519-fsmonitor.sh
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-#!/bin/sh
-
-test_description="Test core.fsmonitor"
-
-. ./perf-lib.sh
-
-#
-# Performance test for the fsmonitor feature which enables git to talk to a
-# file system change monitor and avoid having to scan the working directory
-# for new or modified files.
-#
-# By default, the performance test will utilize the Watchman file system
-# monitor if it is installed.  If Watchman is not installed, it will use a
-# dummy integration script that does not report any new or modified files.
-# The dummy script has very little overhead which provides optimistic results.
-#
-# The performance test will also use the untracked cache feature if it is
-# available as fsmonitor uses it to speed up scanning for untracked files.
-#
-# There are 3 environment variables that can be used to alter the default
-# behavior of the performance test:
-#
-# GIT_PERF_7519_UNTRACKED_CACHE: used to configure core.untrackedCache
-# GIT_PERF_7519_SPLIT_INDEX: used to configure core.splitIndex
-# GIT_PERF_7519_FSMONITOR: used to configure core.fsMonitor
-#
-# The big win for using fsmonitor is the elimination of the need to scan the
-# working directory looking for changed and untracked files. If the file
-# information is all cached in RAM, the benefits are reduced.
-#
-# GIT_PERF_7519_DROP_CACHE: if set, the OS caches are dropped between tests
-#
-
-test_perf_large_repo
-test_checkout_worktree
-
-test_lazy_prereq UNTRACKED_CACHE '
-	{ git update-index --test-untracked-cache; ret=$?; } &&
-	test $ret -ne 1
-'
-
-test_lazy_prereq WATCHMAN '
-	command -v watchman
-'
-
-if test_have_prereq WATCHMAN
-then
-	# Convert unix style paths to escaped Windows style paths for Watchman
-	case "$(uname -s)" in
-	MSYS_NT*)
-	  GIT_WORK_TREE="$(cygpath -aw "$PWD" | sed 's,\\,/,g')"
-	  ;;
-	*)
-	  GIT_WORK_TREE="$PWD"
-	  ;;
-	esac
-fi
-
-if test -n "$GIT_PERF_7519_DROP_CACHE"
-then
-	# When using GIT_PERF_7519_DROP_CACHE, GIT_PERF_REPEAT_COUNT must be 1 to
-	# generate valid results. Otherwise the caching that happens for the nth
-	# run will negate the validity of the comparisons.
-	if test "$GIT_PERF_REPEAT_COUNT" -ne 1
-	then
-		echo "warning: Setting GIT_PERF_REPEAT_COUNT=1" >&2
-		GIT_PERF_REPEAT_COUNT=1
-	fi
-fi
-
-test_expect_success "setup for fsmonitor" '
-	# set untrackedCache depending on the environment
-	if test -n "$GIT_PERF_7519_UNTRACKED_CACHE"
-	then
-		git config core.untrackedCache "$GIT_PERF_7519_UNTRACKED_CACHE"
-	else
-		if test_have_prereq UNTRACKED_CACHE
-		then
-			git config core.untrackedCache true
-		else
-			git config core.untrackedCache false
-		fi
-	fi &&
-
-	# set core.splitindex depending on the environment
-	if test -n "$GIT_PERF_7519_SPLIT_INDEX"
-	then
-		git config core.splitIndex "$GIT_PERF_7519_SPLIT_INDEX"
-	fi &&
-
-	# set INTEGRATION_SCRIPT depending on the environment
-	if test -n "$GIT_PERF_7519_FSMONITOR"
-	then
-		INTEGRATION_SCRIPT="$GIT_PERF_7519_FSMONITOR"
-	else
-		#
-		# Choose integration script based on existence of Watchman.
-		# If Watchman exists, watch the work tree and attempt a query.
-		# If everything succeeds, use Watchman integration script,
-		# else fall back to an empty integration script.
-		#
-		mkdir .git/hooks &&
-		if test_have_prereq WATCHMAN
-		then
-			INTEGRATION_SCRIPT=".git/hooks/fsmonitor-watchman" &&
-			cp "$TEST_DIRECTORY/../templates/hooks--fsmonitor-watchman.sample" "$INTEGRATION_SCRIPT" &&
-			watchman watch "$GIT_WORK_TREE" &&
-			watchman watch-list | grep -q -F "$GIT_WORK_TREE"
-		else
-			INTEGRATION_SCRIPT=".git/hooks/fsmonitor-empty" &&
-			write_script "$INTEGRATION_SCRIPT"<<-\EOF
-			EOF
-		fi
-	fi &&
-
-	git config core.fsmonitor "$INTEGRATION_SCRIPT" &&
-	git update-index --fsmonitor
-'
-
-if test -n "$GIT_PERF_7519_DROP_CACHE"; then
-	test-tool drop-caches
-fi
-
-test_perf "status (fsmonitor=$INTEGRATION_SCRIPT)" '
-	git status
-'
-
-if test -n "$GIT_PERF_7519_DROP_CACHE"; then
-	test-tool drop-caches
-fi
-
-test_perf "status -uno (fsmonitor=$INTEGRATION_SCRIPT)" '
-	git status -uno
-'
-
-if test -n "$GIT_PERF_7519_DROP_CACHE"; then
-	test-tool drop-caches
-fi
-
-test_perf "status -uall (fsmonitor=$INTEGRATION_SCRIPT)" '
-	git status -uall
-'
-
-test_expect_success "setup without fsmonitor" '
-	unset INTEGRATION_SCRIPT &&
-	git config --unset core.fsmonitor &&
-	git update-index --no-fsmonitor
-'
-
-if test -n "$GIT_PERF_7519_DROP_CACHE"; then
-	test-tool drop-caches
-fi
-
-test_perf "status (fsmonitor=$INTEGRATION_SCRIPT)" '
-	git status
-'
-
-if test -n "$GIT_PERF_7519_DROP_CACHE"; then
-	test-tool drop-caches
-fi
-
-test_perf "status -uno (fsmonitor=$INTEGRATION_SCRIPT)" '
-	git status -uno
-'
-
-if test -n "$GIT_PERF_7519_DROP_CACHE"; then
-	test-tool drop-caches
-fi
-
-test_perf "status -uall (fsmonitor=$INTEGRATION_SCRIPT)" '
-	git status -uall
-'
-
-if test_have_prereq WATCHMAN
-then
-	watchman watch-del "$GIT_WORK_TREE" >/dev/null 2>&1 &&
-
-	# Work around Watchman bug on Windows where it holds on to handles
-	# preventing the removal of the trash directory
-	watchman shutdown-server >/dev/null 2>&1
-fi
-
-test_done