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.

4 files changed, 12 insertions, 4 deletions

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
 }