Revert "makechrootpkg: Have functions be more function-y."

This reverts (the bulk of) commit 2fd5931a8c.

Reducing globals makes little sense in in a oneshot bash script, but
reduces code clarity and in fact resulted in bugs because even the
commit author couldn't keep track of the script state.

An exit was changed to a return, even though that made no sense outside
of a function, and has been duly returned to being an exit. This was
never tested and later papered over by wrapping the entire script in a
main() function and then calling the function for hysterical raisins.

The functiony nature of sync_chroot/delete_chroot is preserved, as those
functions demonstrate meaningfully standalone functionality -- who
knows? we may want to reuse this. Everything else is tightly bound to
the internal logic of makechrootpkg.

Completely separate functionality that was silently implemented in the
original commit is also preserved:
- declare a couple of variables as locals
- move the abort-on-no-PKGBUILD outside the install_packages function

Signed-off-by: Eli Schwartz <eschwartz@archlinux.org>
Signed-off-by: Levente Polyak <anthraxx@archlinux.org>

makechrootpkg.in

@@ -151,11 +151,7 @@ delete_chroot() {
 	stat_done
 }
 
-# Usage: install_packages $copydir $pkgs...
 install_packages() {
-	local copydir=$1
-	local install_pkgs=("${@:2}")
-
 	local -a pkgnames
 	local ret
 
@@ -170,16 +166,7 @@ install_packages() {
 	return $ret
 }
 
-# Usage: prepare_chroot $copydir $HOME $keepbuilddir $run_namcap
-# Globals:
-#  - MAKEFLAGS
-#  - PACKAGER
 prepare_chroot() {
-	local copydir=$1
-	local USER_HOME=$2
-	local keepbuilddir=$3
-	local run_namcap=$4
-
 	[[ $keepbuilddir = true ]] || rm -rf "$copydir/build"
 
 	local builduser_uid builduser_gid
@@ -258,13 +245,7 @@ _chrootnamcap() {
 	done
 }
 
-# Usage: download_sources $copydir $makepkg_user
-# Globals:
-#  - SRCDEST
 download_sources() {
-	local copydir=$1
-	local makepkg_user=$2
-
 	setup_workdir
 	chown "$makepkg_user:" "$WORKDIR"
 
@@ -275,15 +256,7 @@ download_sources() {
 		die "Could not download sources."
 }
 
-# Usage: move_products $copydir $owner
-# Globals:
-#  - PKGDEST
-#  - LOGDEST
-#  - SRCPKGDEST
 move_products() {
-	local copydir=$1
-	local src_owner=$2
-
 	local pkgfile
 	for pkgfile in "$copydir"/pkgdest/*; do
 		chown "$src_owner" "$pkgfile"
@@ -389,10 +362,10 @@ $update_first && arch-nspawn "$copydir" \
 		pacman -Syu --noconfirm
 
 if [[ -n ${install_pkgs[*]:-} ]]; then
-	install_packages "$copydir" "${install_pkgs[@]}"
+	install_packages
 	ret=$?
-	# If there is no PKGBUILD we have done
-	[[ -f PKGBUILD ]] || return $ret
+	# If there is no PKGBUILD we are done
+	[[ -f PKGBUILD ]] || exit $ret
 fi
 
 if [[ "$(id -u "$makepkg_user")" == 0 ]]; then
@@ -400,9 +373,9 @@ if [[ "$(id -u "$makepkg_user")" == 0 ]]; then
 	exit 1
 fi
 
-download_sources "$copydir" "$makepkg_user"
+download_sources
 
-prepare_chroot "$copydir" "$USER_HOME" "$keepbuilddir" "$run_namcap"
+prepare_chroot
 
 if arch-nspawn "$copydir" \
 	--bind="$PWD:/startdir" \
@@ -410,7 +383,7 @@ if arch-nspawn "$copydir" \
 	"${bindmounts_ro[@]}" "${bindmounts_rw[@]}" \
 	/chrootbuild "${makepkg_args[@]}"
 then
-	move_products "$copydir" "$src_owner"
+	move_products
 else
 	(( ret += 1 ))
 fi