commitpkg: handle option parsind and help before abort checks

Previously it was not possible to call for the help of find early
command line option problems when invoking in any location on the shell
as the command aborted without PKGBUILD being present.

Fix this by moving everything related to options at the very top.

src/commitpkg.in

@@ -22,16 +22,8 @@ elif [[ -r "$HOME/.makepkg.conf" ]]; then
 fi
 
 cmd=${0##*/}
-
-if [[ ! -f PKGBUILD ]]; then
-	die 'No PKGBUILD file'
-fi
-
-source=()
-# shellcheck source=contrib/makepkg/PKGBUILD.proto
-. ./PKGBUILD
-pkgbase=${pkgbase:-$pkgname}
-
+rsyncopts=(-e ssh -p '--chmod=ug=rw,o=r' -c -h -L --progress --partial -y)
+archreleaseopts=()
 case "$cmd" in
 	commitpkg)
 		if (( $# == 0 )); then
@@ -47,7 +39,26 @@ case "$cmd" in
 		die 'Usage: commitpkg <reponame> [-f] [-s server] [-l limit] [-a arch] [commit message]'
 		;;
 esac
+while getopts ':l:a:s:f' flag; do
+	case $flag in
+		f) archreleaseopts+=('-f') ;;
+		s) server=$OPTARG ;;
+		l) rsyncopts+=("--bwlimit=$OPTARG") ;;
+		a) commit_arch=$OPTARG ;;
+		:) die "Option requires an argument -- '%s'" "$OPTARG" ;;
+		\?) die "Invalid option -- '%s'" "$OPTARG" ;;
+	esac
+done
+shift $(( OPTIND - 1 ))
 
+if [[ ! -f PKGBUILD ]]; then
+	die 'No PKGBUILD file'
+fi
+
+source=()
+# shellcheck source=contrib/makepkg/PKGBUILD.proto
+. ./PKGBUILD
+pkgbase=${pkgbase:-$pkgname}
 
 if (( ${#validpgpkeys[@]} != 0 )); then
 	if [[ -d keys ]]; then
@@ -88,20 +99,6 @@ if (( ${#needsversioning[*]} )); then
 	(( ${#unversioned[*]} )) && die "%s is not under version control" "${unversioned[@]}"
 fi
 
-rsyncopts=(-e ssh -p '--chmod=ug=rw,o=r' -c -h -L --progress --partial -y)
-archreleaseopts=()
-while getopts ':l:a:s:f' flag; do
-	case $flag in
-		f) archreleaseopts+=('-f') ;;
-		s) server=$OPTARG ;;
-		l) rsyncopts+=("--bwlimit=$OPTARG") ;;
-		a) commit_arch=$OPTARG ;;
-		:) die "Option requires an argument -- '%s'" "$OPTARG" ;;
-		\?) die "Invalid option -- '%s'" "$OPTARG" ;;
-	esac
-done
-shift $(( OPTIND - 1 ))
-
 # check packages for validity
 for _arch in "${arch[@]}"; do
 	if [[ -n $commit_arch && ${_arch} != "$commit_arch" ]]; then