ghc-deps.sh: ShellCheck tweaks and sort uniq output

ghc-deps.sh

@@ -1,7 +1,7 @@
 #!/bin/sh
 # find rpm provides and requires for Haskell GHC libraries
 
-[ $# -lt 2 ] && echo "Usage: $(basename $0) [--provides|--requires] %{buildroot} %{ghclibdir} [%{?ghc_name}]" && exit 1
+[ $# -lt 2 ] && echo "Usage: $(basename "$0") [--provides|--requires] %{buildroot} %{ghclibdir} [%{?ghc_version}]" && exit 1
 
 set +x
 
@@ -12,7 +12,7 @@ if [ -z "$4" ];
 then GHCPREFIX=ghc
 else GHCPREFIX=$4
 fi
-if [ -d $BUILDROOT$PKGBASEDIR/lib ];
+if [ -d "$BUILDROOT$PKGBASEDIR/lib" ];
 then PKGBASELIB=$PKGBASEDIR/lib
 else PKGBASELIB=$PKGBASEDIR
 fi
@@ -23,20 +23,20 @@ GHC_PKG="/usr/lib/rpm/ghc-pkg-wrapper $BUILDROOT$PKGBASEDIR"
 case $MODE in
     --provides) field=id ;;
     --requires) field=depends ;;
-    *) echo "$(basename $0): Need --provides or --requires"
+    *) echo "$(basename "$0"): Need --provides or --requires"
        exit 1
        ;;
 esac
 
 files=$(cat)
 
+(
 for i in $files; do
-    meta=""
     case $i in
         # exclude rts.conf
         $BUILDROOT$PKGCONFDIR/*-*.conf)
-            name=$(grep "^name: " $i | sed -e "s/name: //")
-            ids=$($GHC_PKG field $name $field | sed -e "s/\(^\| \)rts\( \|$\)/ /")
+            name=$(grep "^name: " "$i" | sed -e "s/name: //")
+            ids=$($GHC_PKG field "$name" "$field" | sed -e "s/\(^\| \)rts\( \|$\)/ /")
             for d in $ids; do
                 case $d in
                     *-*-internal) ;;
@@ -46,8 +46,8 @@ for i in $files; do
             done
             ;;
         */libHS*_p.a)
-            pkgver=$(basename $(dirname $i))
-            ids=$($GHC_PKG field $pkgver $field | sed -e "s/\(^\| \)rts\( \|$\)/ /" -e "s/bin-package-db-[^ ]\+//")
+            pkgver=$(basename "$(dirname "$i")")
+            ids=$($GHC_PKG field "$pkgver" "$field" | sed -e "s/\(^\| \)rts\( \|$\)/ /" -e "s/bin-package-db-[^ ]\+//")
             for d in $ids; do
                 case $d in
                     *-*-internal) ;;
@@ -57,7 +57,7 @@ for i in $files; do
                                 echo "$GHCPREFIX-prof($d)"
                                 ;;
                             *)
-                                if [ -f $PKGBASELIB/*/libHS${d}_p.a -o -f $BUILDROOT$PKGBASELIB/*/libHS${d}_p.a ]; then
+                                if [ -f "$PKGBASELIB"/*/libHS"${d}"_p.a ] || [ -f "$BUILDROOT$PKGBASELIB"/*/libHS"${d}"_p.a ]; then
                                     echo "$GHCPREFIX-prof($d)"
                                 fi
                                 ;;
@@ -68,3 +68,4 @@ for i in $files; do
             ;;
     esac
 done
+) | sort | uniq