libmakepkg: fix regression in sending plain() output to stderr

In commit 882e707e40bbade0111cf3bdedbdac4d4b70453b we changed message
output to go to stdout by default, unless it was an error. The plain()
function doesn't *look* like an error function, but in practice it was
-- it's used to continue multiline messages, and all in-tree uses were
for warning/error.

This is a problem both because we're sending output to the wrong place,
and because in some cases, we were performing error logging from a
function which would otherwise return a value to be captured in a
variable using command substution.

Fix this and straighten out the API by providing two functions: one for
continuing msg output, and one which wraps this by sending output to
stderr, for continuing error output.

Change all callers to use the second function.

(cherry picked from commit bf458cced7c0845f7b6fabb887d3878ae4cd51b2)

12 files changed, 41 insertions, 33 deletions

diff --git a/scripts/libmakepkg/executable/vcs.sh.in b/scripts/libmakepkg/executable/vcs.sh.in
index 6eb93fae..436b82db 100644
--- a/scripts/libmakepkg/executable/vcs.sh.in
+++ b/scripts/libmakepkg/executable/vcs.sh.in
@@ -43,7 +43,7 @@ get_vcsclient() {
 	# if we didn't find an client, return an error
 	if [[ -z $client ]]; then
 		error "$(gettext "Unknown download protocol: %s")" "$proto"
-		plain "$(gettext "Aborting...")"
+		plainerr "$(gettext "Aborting...")"
 		exit $E_CONFIG_ERROR
 	fi
 
diff --git a/scripts/libmakepkg/integrity/verify_signature.sh.in b/scripts/libmakepkg/integrity/verify_signature.sh.in
index a1bf7f1c..2be5c493 100644
--- a/scripts/libmakepkg/integrity/verify_signature.sh.in
+++ b/scripts/libmakepkg/integrity/verify_signature.sh.in
@@ -112,7 +112,7 @@ check_pgpsigs() {
 
 	if (( warnings )); then
 		warning "$(gettext "Warnings have occurred while verifying the signatures.")"
-		plain "$(gettext "Please make sure you really trust them.")"
+		plainerr "$(gettext "Please make sure you really trust them.")"
 	fi
 }
 
diff --git a/scripts/libmakepkg/source/bzr.sh.in b/scripts/libmakepkg/source/bzr.sh.in
index 1227c739..d8e47185 100644
--- a/scripts/libmakepkg/source/bzr.sh.in
+++ b/scripts/libmakepkg/source/bzr.sh.in
@@ -52,7 +52,7 @@ download_bzr() {
 		msg2 "$(gettext "Branching %s...")" "${displaylocation}"
 		if ! bzr branch "$url" "$dir" --no-tree --use-existing-dir; then
 			error "$(gettext "Failure while branching %s")" "${displaylocation}"
-			plain "$(gettext "Aborting...")"
+			plainerr "$(gettext "Aborting...")"
 			exit 1
 		fi
 	elif (( ! HOLDVER )); then
@@ -83,7 +83,7 @@ extract_bzr() {
 				;;
 			*)
 				error "$(gettext "Unrecognized reference: %s")" "${fragment}"
-				plain "$(gettext "Aborting...")"
+				plainerr "$(gettext "Aborting...")"
 				exit 1
 		esac
 	fi
@@ -98,12 +98,12 @@ extract_bzr() {
 		cd_safe "${dir##*/}"
 		if ! (bzr pull "$dir" -q --overwrite -r "$rev" && bzr clean-tree -q --detritus --force); then
 			error "$(gettext "Failure while updating working copy of %s %s repo")" "${repo}" "bzr"
-			plain "$(gettext "Aborting...")"
+			plainerr "$(gettext "Aborting...")"
 			exit 1
 		fi
 	elif ! bzr checkout "$dir" -r "$rev"; then
 		error "$(gettext "Failure while creating working copy of %s %s repo")" "${repo}" "bzr"
-		plain "$(gettext "Aborting...")"
+		plainerr "$(gettext "Aborting...")"
 		exit 1
 	fi
 
diff --git a/scripts/libmakepkg/source/file.sh.in b/scripts/libmakepkg/source/file.sh.in
index 2b804564..b29aeb04 100644
--- a/scripts/libmakepkg/source/file.sh.in
+++ b/scripts/libmakepkg/source/file.sh.in
@@ -72,7 +72,7 @@ download_file() {
 	if ! command -- "${cmdline[@]}" >&2; then
 		[[ ! -s $dlfile ]] && rm -f -- "$dlfile"
 		error "$(gettext "Failure while downloading %s")" "$url"
-		plain "$(gettext "Aborting...")"
+		plainerr "$(gettext "Aborting...")"
 		exit 1
 	fi
 
@@ -137,7 +137,7 @@ extract_file() {
 	fi
 	if (( ret )); then
 		error "$(gettext "Failed to extract %s")" "$file"
-		plain "$(gettext "Aborting...")"
+		plainerr "$(gettext "Aborting...")"
 		exit 1
 	fi
 
diff --git a/scripts/libmakepkg/source/git.sh.in b/scripts/libmakepkg/source/git.sh.in
index a29be3c5..95e653ca 100644
--- a/scripts/libmakepkg/source/git.sh.in
+++ b/scripts/libmakepkg/source/git.sh.in
@@ -50,7 +50,7 @@ download_git() {
 		msg2 "$(gettext "Cloning %s %s repo...")" "${repo}" "git"
 		if ! git clone --mirror "$url" "$dir"; then
 			error "$(gettext "Failure while downloading %s %s repo")" "${repo}" "git"
-			plain "$(gettext "Aborting...")"
+			plainerr "$(gettext "Aborting...")"
 			exit 1
 		fi
 	elif (( ! HOLDVER )); then
@@ -58,7 +58,7 @@ download_git() {
 		# Make sure we are fetching the right repo
 		if [[ "$url" != "$(git config --get remote.origin.url)" ]] ; then
 			error "$(gettext "%s is not a clone of %s")" "$dir" "$url"
-			plain "$(gettext "Aborting...")"
+			plainerr "$(gettext "Aborting...")"
 			exit 1
 		fi
 		msg2 "$(gettext "Updating %s %s repo...")" "${repo}" "git"
@@ -87,13 +87,13 @@ extract_git() {
 		cd_safe "${dir##*/}"
 		if ! git fetch; then
 			error "$(gettext "Failure while updating working copy of %s %s repo")" "${repo}" "git"
-			plain "$(gettext "Aborting...")"
+			plainerr "$(gettext "Aborting...")"
 			exit 1
 		fi
 		cd_safe "$srcdir"
 	elif ! git clone -s "$dir" "${dir##*/}"; then
 		error "$(gettext "Failure while creating working copy of %s %s repo")" "${repo}" "git"
-		plain "$(gettext "Aborting...")"
+		plainerr "$(gettext "Aborting...")"
 		exit 1
 	fi
 
@@ -110,7 +110,7 @@ extract_git() {
 				;;
 			*)
 				error "$(gettext "Unrecognized reference: %s")" "${fragment}"
-				plain "$(gettext "Aborting...")"
+				plainerr "$(gettext "Aborting...")"
 				exit 1
 		esac
 	fi
@@ -119,7 +119,7 @@ extract_git() {
 		tagname="$(git tag -l --format='%(tag)' "$ref")"
 		if [[ -n $tagname && $tagname != "$ref" ]]; then
 			error "$(gettext "Failure while checking out version %s, the git tag has been forged")" "$ref"
-			plain "$(gettext "Aborting...")"
+			plainerr "$(gettext "Aborting...")"
 			exit 1
 		fi
 	fi
@@ -127,7 +127,7 @@ extract_git() {
 	if [[ $ref != "origin/HEAD" ]] || (( updating )) ; then
 		if ! git checkout --force --no-track -B makepkg "$ref" --; then
 			error "$(gettext "Failure while creating working copy of %s %s repo")" "${repo}" "git"
-			plain "$(gettext "Aborting...")"
+			plainerr "$(gettext "Aborting...")"
 			exit 1
 		fi
 	fi
diff --git a/scripts/libmakepkg/source/hg.sh.in b/scripts/libmakepkg/source/hg.sh.in
index b5af6ce0..d47458f9 100644
--- a/scripts/libmakepkg/source/hg.sh.in
+++ b/scripts/libmakepkg/source/hg.sh.in
@@ -49,7 +49,7 @@ download_hg() {
 		msg2 "$(gettext "Cloning %s %s repo...")" "${repo}" "hg"
 		if ! hg clone -U "$url" "$dir"; then
 			error "$(gettext "Failure while downloading %s %s repo")" "${repo}" "hg"
-			plain "$(gettext "Aborting...")"
+			plainerr "$(gettext "Aborting...")"
 			exit 1
 		fi
 	elif (( ! HOLDVER )); then
@@ -91,7 +91,7 @@ extract_hg() {
 				;;
 			*)
 				error "$(gettext "Unrecognized reference: %s")" "${fragment}"
-				plain "$(gettext "Aborting...")"
+				plainerr "$(gettext "Aborting...")"
 				exit 1
 		esac
 	fi
@@ -100,12 +100,12 @@ extract_hg() {
 		cd_safe "${dir##*/}"
 		if ! (hg pull && hg update -C -r "$ref"); then
 			error "$(gettext "Failure while updating working copy of %s %s repo")" "${repo}" "hg"
-			plain "$(gettext "Aborting...")"
+			plainerr "$(gettext "Aborting...")"
 			exit 1
 		fi
 	elif ! hg clone -u "$ref" "$dir" "${dir##*/}"; then
 		error "$(gettext "Failure while creating working copy of %s %s repo")" "${repo}" "hg"
-		plain "$(gettext "Aborting...")"
+		plainerr "$(gettext "Aborting...")"
 		exit 1
 	fi
 
diff --git a/scripts/libmakepkg/source/svn.sh.in b/scripts/libmakepkg/source/svn.sh.in
index e808b2cb..89205ec3 100644
--- a/scripts/libmakepkg/source/svn.sh.in
+++ b/scripts/libmakepkg/source/svn.sh.in
@@ -60,7 +60,7 @@ download_svn() {
 				;;
 			*)
 				error "$(gettext "Unrecognized reference: %s")" "${fragment}"
-				plain "$(gettext "Aborting...")"
+				plainerr "$(gettext "Aborting...")"
 				exit 1
 		esac
 	fi
@@ -70,7 +70,7 @@ download_svn() {
 		mkdir -p "$dir/.makepkg"
 		if ! svn checkout -r ${ref} --config-dir "$dir/.makepkg" "$url" "$dir"; then
 			error "$(gettext "Failure while downloading %s %s repo")" "${repo}" "svn"
-			plain "$(gettext "Aborting...")"
+			plainerr "$(gettext "Aborting...")"
 			exit 1
 		fi
 	elif (( ! HOLDVER )); then
diff --git a/scripts/libmakepkg/util/config.sh.in b/scripts/libmakepkg/util/config.sh.in
index a8975d6d..ea909f84 100644
--- a/scripts/libmakepkg/util/config.sh.in
+++ b/scripts/libmakepkg/util/config.sh.in
@@ -39,7 +39,7 @@ source_makepkg_config() {
 		source_safe "$MAKEPKG_CONF"
 	else
 		error "$(gettext "%s not found.")" "$MAKEPKG_CONF"
-		plain "$(gettext "Aborting...")"
+		plainerr "$(gettext "Aborting...")"
 		exit $E_CONFIG_ERROR
 	fi
 
diff --git a/scripts/libmakepkg/util/message.sh.in b/scripts/libmakepkg/util/message.sh.in
index 061bd858..625f11b1 100644
--- a/scripts/libmakepkg/util/message.sh.in
+++ b/scripts/libmakepkg/util/message.sh.in
@@ -43,12 +43,20 @@ colorize() {
 	readonly ALL_OFF BOLD BLUE GREEN RED YELLOW
 }
 
+# plainerr/plainerr are primarily used to continue a previous message on a new
+# line, depending on whether the first line is a regular message or an error
+# output
+
 plain() {
 	(( QUIET )) && return
 	local mesg=$1; shift
 	printf "${BOLD}    ${mesg}${ALL_OFF}\n" "$@"
 }
 
+plainerr() {
+	plain "$@" >&2
+}
+
 msg() {
 	(( QUIET )) && return
 	local mesg=$1; shift
diff --git a/scripts/libmakepkg/util/source.sh.in b/scripts/libmakepkg/util/source.sh.in
index e0490661..be7c15c2 100644
--- a/scripts/libmakepkg/util/source.sh.in
+++ b/scripts/libmakepkg/util/source.sh.in
@@ -156,7 +156,7 @@ get_downloadclient() {
 	# if we didn't find an agent, return an error
 	if [[ -z $agent ]]; then
 		error "$(gettext "Unknown download protocol: %s")" "$proto"
-		plain "$(gettext "Aborting...")"
+		plainerr "$(gettext "Aborting...")"
 		exit 1 # $E_CONFIG_ERROR
 	fi
 
@@ -165,7 +165,7 @@ get_downloadclient() {
 	if [[ ! -x $program ]]; then
 		local baseprog="${program##*/}"
 		error "$(gettext "The download program %s is not installed.")" "$baseprog"
-		plain "$(gettext "Aborting...")"
+		plainerr "$(gettext "Aborting...")"
 		exit 1 # $E_MISSING_PROGRAM
 	fi
 
diff --git a/scripts/libmakepkg/util/util.sh.in b/scripts/libmakepkg/util/util.sh.in
index 8f6d6d3a..d1d11eb3 100644
--- a/scripts/libmakepkg/util/util.sh.in
+++ b/scripts/libmakepkg/util/util.sh.in
@@ -78,7 +78,7 @@ dir_is_empty() {
 cd_safe() {
 	if ! cd "$1"; then
 		error "$(gettext "Failed to change to directory %s")" "$1"
-		plain "$(gettext "Aborting...")"
+		plainerr "$(gettext "Aborting...")"
 		exit 1
 	fi
 }
diff --git a/scripts/makepkg.sh.in b/scripts/makepkg.sh.in
index c928e562..2c8d8673 100644
--- a/scripts/makepkg.sh.in
+++ b/scripts/makepkg.sh.in
@@ -219,7 +219,7 @@ update_pkgver() {
 # Print 'source not found' error message and exit makepkg
 missing_source_file() {
 	error "$(gettext "Unable to find source file %s.")" "$(get_filename "$1")"
-	plain "$(gettext "Aborting...")"
+	plainerr "$(gettext "Aborting...")"
 	exit $E_MISSING_FILE
 }
 
@@ -354,7 +354,7 @@ error_function() {
 	# first exit all subshells, then print the error
 	if (( ! BASH_SUBSHELL )); then
 		error "$(gettext "A failure occurred in %s().")" "$1"
-		plain "$(gettext "Aborting...")"
+		plainerr "$(gettext "Aborting...")"
 	fi
 	exit $E_USER_FUNCTION_FAILED
 }
@@ -672,7 +672,7 @@ create_package() {
 
 	if [[ ! -d $pkgdir ]]; then
 		error "$(gettext "Missing %s directory.")" "\$pkgdir/"
-		plain "$(gettext "Aborting...")"
+		plainerr "$(gettext "Aborting...")"
 		exit $E_MISSING_PKGDIR
 	fi
 
@@ -1145,23 +1145,23 @@ lint_config || exit $E_CONFIG_ERROR
 
 # check that all settings directories are user-writable
 if ! ensure_writable_dir "BUILDDIR" "$BUILDDIR"; then
-	plain "$(gettext "Aborting...")"
+	plainerr "$(gettext "Aborting...")"
 	exit $E_FS_PERMISSIONS
 fi
 
 if (( ! (NOBUILD || GENINTEG) )) && ! ensure_writable_dir "PKGDEST" "$PKGDEST"; then
-	plain "$(gettext "Aborting...")"
+	plainerr "$(gettext "Aborting...")"
 	exit $E_FS_PERMISSIONS
 fi
 
 if ! ensure_writable_dir "SRCDEST" "$SRCDEST" ; then
-	plain "$(gettext "Aborting...")"
+	plainerr "$(gettext "Aborting...")"
 	exit $E_FS_PERMISSIONS
 fi
 
 if (( SOURCEONLY )); then
 	if ! ensure_writable_dir "SRCPKGDEST" "$SRCPKGDEST"; then
-		plain "$(gettext "Aborting...")"
+		plainerr "$(gettext "Aborting...")"
 		exit $E_FS_PERMISSIONS
 	fi
 
@@ -1171,7 +1171,7 @@ if (( SOURCEONLY )); then
 fi
 
 if (( LOGGING )) && ! ensure_writable_dir "LOGDEST" "$LOGDEST"; then
-	plain "$(gettext "Aborting...")"
+	plainerr "$(gettext "Aborting...")"
 	exit $E_FS_PERMISSIONS
 fi