abump: fix set -e issue

It appears that when the subshell has a ||, the 'set -e' within
subshell gets invalidated.

This will work as expected:

 ( set -e; false; echo "should not get here" )

While this will not work as expected:

 ( set -e; false; echo "should not get here" ) || false

We resolve it by using $? to detect the status of subshell. We also let
the exitcode indicate how many packages that failed.

While here we also refactor it so most of the loop happens within the
subshell. This lets us set (or increase) rc variable once, and it
reduces number of forks which gives slightly better performance.

abump.in

@@ -25,22 +25,22 @@ do_bump() {
 		name=${p%-[0-9]*}
 		ver=${p#${name}-}
 
-		# calculate APKBUILD's path
+		(
+		set -e
+
+		# calculate APKBUILD's path    #vim syntax higlight '
 		if [ "${name#*/}" != "$name" ] && ! [ -d "$APORTSDIR/${name%/*}" ]; then
-			error "'$p' should be of form 'foo-1.2.3' or 'main/foo-1.2.3'"
-			rc=1; continue
+			die "'$p' should be of form 'foo-1.2.3' or 'main/foo-1.2.3'"
 		fi
-		a=$(aports_buildscript "$name" || die "can't find APKBUILD for $name") || { rc=1; continue; }
+		a=$(aports_buildscript "$name" ) \
+			|| die "can't find APKBUILD for $name"
 
 		# verify APKBUILD
-		(
 		. "$a" || exit 1
-		[ "$pkgname" = "$name" ] || die "APKBUILD has different \$pkgname for $name"
-		type package | grep -q function || die "missing package() for $name"
-		) || { rc=1; continue; }
-
-		(
-		set -e
+		[ "$pkgname" = "$name" ] \
+			|| die "APKBUILD has different \$pkgname for $name"
+		type package | grep -q function \
+			|| die "missing package() for $name"
 
 		cd "${a%/*}"
 		section=${PWD%/*}
@@ -63,7 +63,8 @@ fixes #${fixes#\#}
 
 		git add APKBUILD
 		git commit -m"$message"
-		) || rc=1
+		)
+		rc=$(( $rc + $? ))
 	done
 	return $rc
 }