gitfast: update to upstream v2.4

Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>

plugins/gitfast/git-prompt.sh

@@ -84,6 +84,11 @@
 # GIT_PS1_SHOWCOLORHINTS to a nonempty value. The colors are based on
 # the colored output of "git status -sb" and are available only when
 # using __git_ps1 for PROMPT_COMMAND or precmd.
+#
+# If you would like __git_ps1 to do nothing in the case when the current
+# directory is set up to be ignored by git, then set
+# GIT_PS1_HIDE_IF_PWD_IGNORED to a nonempty value. Override this on the
+# repository level by setting bash.hideIfPwdIgnored to "false".
 
 # check whether printf supports -v
 __git_printf_supports_v=
@@ -270,7 +275,7 @@ __git_ps1_colorize_gitstring ()
 
 __git_eread ()
 {
-	f="$1"
+	local f="$1"
 	shift
 	test -r "$f" && read "$@" <"$f"
 }
@@ -288,6 +293,8 @@ __git_eread ()
 # In this mode you can request colored hints using GIT_PS1_SHOWCOLORHINTS=true
 __git_ps1 ()
 {
+	# preserve exit status
+	local exit=$?
 	local pcmode=no
 	local detached=no
 	local ps1pc_start='\u@\h:\w '
@@ -299,10 +306,14 @@ __git_ps1 ()
 			ps1pc_start="$1"
 			ps1pc_end="$2"
 			printf_format="${3:-$printf_format}"
+			# set PS1 to a plain prompt so that we can
+			# simply return early if the prompt should not
+			# be decorated
+			PS1="$ps1pc_start$ps1pc_end"
 		;;
 		0|1)	printf_format="${1:-$printf_format}"
 		;;
-		*)	return
+		*)	return $exit
 		;;
 	esac
 
@@ -350,11 +361,7 @@ __git_ps1 ()
 	rev_parse_exit_code="$?"
 
 	if [ -z "$repo_info" ]; then
-		if [ $pcmode = yes ]; then
-			#In PC mode PS1 always needs to be set
-			PS1="$ps1pc_start$ps1pc_end"
-		fi
-		return
+		return $exit
 	fi
 
 	local short_sha
@@ -369,6 +376,14 @@ __git_ps1 ()
 	local inside_gitdir="${repo_info##*$'\n'}"
 	local g="${repo_info%$'\n'*}"
 
+	if [ "true" = "$inside_worktree" ] &&
+	   [ -n "${GIT_PS1_HIDE_IF_PWD_IGNORED-}" ] &&
+	   [ "$(git config --bool bash.hideIfPwdIgnored)" != "false" ] &&
+	   git check-ignore -q .
+	then
+		return $exit
+	fi
+
 	local r=""
 	local b=""
 	local step=""
@@ -412,10 +427,7 @@ __git_ps1 ()
 		else
 			local head=""
 			if ! __git_eread "$g/HEAD" head; then
-				if [ $pcmode = yes ]; then
-					PS1="$ps1pc_start$ps1pc_end"
-				fi
-				return
+				return $exit
 			fi
 			# is it a symbolic ref?
 			b="${head#ref: }"
@@ -468,13 +480,14 @@ __git_ps1 ()
 			fi
 		fi
 		if [ -n "${GIT_PS1_SHOWSTASHSTATE-}" ] &&
-		   [ -r "$g/refs/stash" ]; then
+		   git rev-parse --verify --quiet refs/stash >/dev/null
+		then
 			s="$"
 		fi
 
 		if [ -n "${GIT_PS1_SHOWUNTRACKEDFILES-}" ] &&
 		   [ "$(git config --bool bash.showUntrackedFiles)" != "false" ] &&
-		   git ls-files --others --exclude-standard --error-unmatch -- '*' >/dev/null 2>/dev/null
+		   git ls-files --others --exclude-standard --error-unmatch -- ':/*' >/dev/null 2>/dev/null
 		then
 			u="%${ZSH_VERSION+%}"
 		fi
@@ -510,4 +523,6 @@ __git_ps1 ()
 	else
 		printf -- "$printf_format" "$gitstring"
 	fi
+
+	return $exit
 }