Add auto detection of MSYS environment and determine package prefix for shorter package names; also add '-t' option to install package in TARGET MSYS env

aptman

@@ -14,11 +14,53 @@ then
     exit 1
 fi
 
+PREFIX=""
+target_env="$MSYSTEM"
+cmd=""
+
+if [ "$1" == "-t" ]
+then
+    shift
+    target_env="${1^^}" #make uppercase
+    shift
+
+    case "$target_env" in
+        MSYS|msys|ALL|all)
+            PREFIX=""
+            ;;
+        MINGW64|mingw64)
+            PREFIX="mingw-w64-x86_64-"
+            ;;
+        UCRT64|ucrt64)
+            PREFIX="mingw-w64-ucrt-x86_64-"
+            ;;
+        CLANG64|clang64)
+            PREFIX="mingw-w64-clang-x86_64-"
+            ;;
+        MINGW64|mingw64)
+            PREFIX="mingw-w64-i686-"
+            ;;
+        CLANG32|clang32)
+            PREFIX="mingw-w64-clang-i686-"
+            ;;
+        CLANGARM64|clangarm64)
+            PREFIX="mingw-w64-clang-aarch64-"
+            ;;
+        *)
+            echo "ERROR: Unknown environment '$target_env' given."
+            exit
+            ;;
+        esac
+else
+    if [ "$MSYSTEM" != "MSYS" ]
+    then
+        PREFIX="$MINGW_PACKAGE_PREFIX""-"
+    fi
+fi
 
 cmd="$1" # catch first arguments with $1 
 shift # drop the first argument from "$@"
 
-
 case "$cmd" in
     update)
         # Update local package repo/cache
@@ -38,13 +80,13 @@ case "$cmd" in
         ;;
     install|reinstall)
         # (re)Install a package and its dependencies
-        echo "Installing '$@' ..."
-        pacman -S "$@"
+        echo "Installing '$@' from '$target_env' ..."
+        pacman -S "$PREFIX$@"
         ;;
     remove)
         # Remove package - keep dependencies
-        echo "Removing '$@' ..."
-        pacman -R "$@"
+        echo "Removing '$@' from '$target_env' ..."
+        pacman -R "$PREFIX$@"
         echo ""
         echo "If you want to remove unused dependencies, run 'aptman autoremove'"
         echo "or consider 'aptman purge [PKG]' next time."
@@ -56,8 +98,8 @@ case "$cmd" in
         ;;
     purge)
         # Remove package, dependencies and all of the config files
-        echo "Removing '$@', configurations and dependencies ..."
-        pacman -Rns "$@"
+        echo "Removing '$@', configurations and dependencies from '$target_env' ..."
+        pacman -Rns "$PREFIX$@"
         ;;
     check)
         # Check & potentially fix broken dependencies
@@ -66,13 +108,18 @@ case "$cmd" in
         ;;
     search)
         # Search for available packages
-        echo "Searching packages for '$@' ..."
-        pacman -Ss "$@"
+        echo "Searching packages for '$@' in '$target_env' ..."
+        if [ "$PREFIX" ]
+        then
+            pacman -Ss "$@" "$PREFIX"
+        else
+            pacman -Ss "$@"
+        fi
         ;;
     show)
         # Show info for a package
-        echo "Showing info for '$@' ..."
-        pacman -Si "$@"
+        echo "Showing info for '$PREFIX$@' ..."
+        pacman -Si "$PREFIX$@"
         ;;
     clean)
         # Clean up pacman cache