Added '-s', which shows the final list of packages that would be installed.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@36399 a95241bf-73f2-0310-859d-f6bbb57e9c96

data/bin/installoptionalpackage

@@ -479,7 +479,7 @@ function IsPackageAndDepsOkToInstall()
 
 function BuildListOfRequestedPackages()
 {
-	if [ "$1" = '-a' ]; then
+	if [ "$1" = '-a' ] || [ "$1" = '-s' ]; then
 		shift
 	fi
 	while [ $# -gt 0 ]; do
@@ -492,23 +492,9 @@ function BuildListOfRequestedPackages()
 function AddPackages()
 {
 	# AddPackages
-	packagesToInstall=""
-	proceedWithInstallation=false
-	
-	for desiredPackage in ${wantsToInstall}; do
-		if IsPackageNameValid $desiredPackage  ; then
-			for item in ${availablePackages[${desiredPackage}]} ; do
-				if ! ContainsSubstring "${packagesToInstall}" "${item}" ; then
-					packagesToInstall="${packagesToInstall} ${item}"
-				fi
-			done
-			proceedWithInstallation=true
-		fi
-	done
 	
 	# If one or more packages can be installed, do it.
-	if $proceedWithInstallation  ; then
+	if BuildFinalListOfPackagesToInstall ; then
-		echo "To be installed: ${packagesToInstall}"
 		
 		for package in ${packagesToInstall} ; do
 			# output the "if [ IsOptionalHaikuImagePackageAdded..." code block
@@ -526,6 +512,32 @@ function AddPackages()
 }
 
 
+function BuildFinalListOfPackagesToInstall()
+{
+	# BuildFinalListOfPackagesToInstall
+	
+	packagesToInstall=""
+	proceedWithInstallation=false
+	
+	for desiredPackage in ${wantsToInstall}; do
+		if IsPackageNameValid $desiredPackage  ; then
+			for item in ${availablePackages[${desiredPackage}]} ; do
+				if ! ContainsSubstring "${packagesToInstall}" "${item}" ; then
+					packagesToInstall="${packagesToInstall} ${item}"
+				fi
+			done
+			proceedWithInstallation=true
+		fi
+	done
+	if [ $proceedWithInstallation ] ; then
+		echo "To be installed: ${packagesToInstall}"
+		return 0
+	else
+		return 1
+	fi
+}
+
+
 function IsPackageNameValid()
 {
 	# IsPackageNameValid <name>
@@ -709,11 +721,12 @@ Disclaimer:
     http://dev.haiku-os.org/wiki/PackageFormat
 
 Usage: ./installoptionalpackage [<pkg> [<pkg> ...]]
-  or   ./installoptionalpackage [-a <pkg> [<pkg> ...]]
+  or   ./installoptionalpackage [-a|-s <pkg> [<pkg> ...]]
   or   ./installoptionalpackage [-f|-h|-l]
 
 Options:  
 -a     Add one or more packages and all dependencies
+-s     Show the final list of packages that would be installed
 -f     Remove cached data and list installable packages
 -h     Print this help.
 -l     List installable packages
@@ -765,14 +778,15 @@ else
 fi
 
 # Support `installoptionalpackage <pkg> <pkg> ...`
-if [ "$1" != '-f' ] && [ "$1" != '-l' ] && [ "$1" != '-h' ]; then
+if [ "$1" != '-f' ] && [ "$1" != '-l' ] && [ "$1" != '-h' ] \
+	&& [ "$1" != '-s' ]; then
 	BuildListOfRequestedPackages $@
 	AddPackages
 	exit 0
 fi	
 
 # Parse the arguments given to the script.
-while getopts "a:fhl" opt; do
+while getopts "as:fhl" opt; do
 	case $opt in
 		a)
 			BuildListOfRequestedPackages $@
@@ -792,6 +806,11 @@ while getopts "a:fhl" opt; do
 			ListPackages
 			exit 0
 			;;
+		s)
+			BuildListOfRequestedPackages $@
+			BuildFinalListOfPackagesToInstall
+			exit 0
+			;;
 		\?)
 			echo "Invalid option: -$OPTARG" >&2
 			exit 1