Add help and list executables options for bin/run script

bin/run script is described as:

"simple wrapper script to run non-installed executables from workdir".

When the bin/run script was used without parameters, it was generating
error as it could not run the folder workdir/LinkTarget/Executable.
Now, we print usage instructions in this case, or when help is
requested with -h, -help or --help.

Also, now user can get the list of executables with -l, -list or --list.

In normal execution, the script's name is also printed. For example:

$ ./bin/run minvcl
Setting env variables and running workdir/LinkTarget/Executable/minvcl
...

Change-Id: I5c62c300d5247f55d1d1cfd095cecffc979d494b
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/137626
Tested-by: Hossein <hossein@libreoffice.org>
Reviewed-by: Hossein <hossein@libreoffice.org>

1 files changed, 33 insertions, 0 deletions

diff --git a/bin/run b/bin/run
index 523da3c0e178..5405bd34cd2a 100755
--- a/bin/run
+++ b/bin/run
@@ -9,6 +9,31 @@
 
 # simple wrapper script to run non-installed executables from workdir
 
+print_usage()
+{
+    echo "This utility can be used to run the executables in this folder:"
+    echo
+    echo "  workdir/LinkTarget/Executable"
+    echo
+    echo "Usage:"
+    echo
+    echo "  ./bin/run application [parameters]|--list|--help"
+    echo
+    echo "Use --list (same as -list or -l) to get the list of executables"
+    echo "Use --help (same as -help or -h) to get this help"
+}
+
+list_executables()
+{
+    echo "Listing executables inside workdir/LinkTarget/Executable folder:"
+    find workdir/LinkTarget/Executable -executable -printf "%P\n"
+}
+
+print_executable_name()
+{
+    echo "Setting env variables and running workdir/LinkTarget/Executable/$1"
+}
+
 setdefaults()
 {
     dir=$(realpath "$(pwd)")
@@ -25,6 +50,14 @@ setdefaults()
     export URE_BOOTSTRAP=file://"${dir}"/instdir/program/fundamentalrc
 }
 
+case "$1" in
+    ""|"-h"|"-help"|"--help")
+        print_usage; return 1;;
+    "-l"|"-list"|"--list")
+        list_executables; return 0;;
+    *) print_executable_name $1;;
+esac
+
 if uname | grep -i CYGWIN >/dev/null; then
 
     setdefaults