Allwmake: Provides clearer message when OpenFOAM environment is not loaded

Patch contributed by Bruno Santos
Resolves patch request https://bugs.openfoam.org/view.php?id=2424

Allwmake

@@ -2,8 +2,9 @@
 cd ${0%/*} || exit 1    # Run from this directory
 
 # Parse arguments for library compilation
-. $WM_PROJECT_DIR/wmake/scripts/AllwmakeParseArguments
+. wmake/scripts/AllwmakeParseArguments
 
+# Perform various checks
 wmakeCheckPwd "$WM_PROJECT_DIR" || {
     echo "Allwmake error: Current directory is not \$WM_PROJECT_DIR"
     echo "    The environment variables are inconsistent with the installation."

applications/Allwmake

@@ -2,8 +2,9 @@
 cd ${0%/*} || exit 1    # Run from this directory
 
 # Parse arguments for library compilation
-. $WM_PROJECT_DIR/wmake/scripts/AllwmakeParseArguments
+. ../wmake/scripts/AllwmakeParseArguments
 
+# Perform various checks
 wmakeCheckPwd "$WM_PROJECT_DIR/applications" || {
     echo "Allwmake error: Current directory is not \$WM_PROJECT_DIR/applications"
     echo "    The environment variables are inconsistent with the installation."

src/Allwmake

@@ -2,8 +2,9 @@
 cd ${0%/*} || exit 1    # Run from this directory
 
 # Parse arguments for library compilation
-. $WM_PROJECT_DIR/wmake/scripts/AllwmakeParseArguments
+. ../wmake/scripts/AllwmakeParseArguments
 
+# Perform various checks
 wmakeCheckPwd "$WM_PROJECT_DIR/src" || {
     echo "Allwmake error: Current directory is not \$WM_PROJECT_DIR/src"
     echo "    The environment variables are inconsistent with the installation."

wmake/scripts/AllwmakeParseArguments

@@ -2,7 +2,7 @@
 # =========                 |
 # \\      /  F ield         | OpenFOAM: The Open Source CFD Toolbox
 #  \\    /   O peration     |
-#   \\  /    A nd           | Copyright (C) 2014-2016 OpenFOAM Foundation
+#   \\  /    A nd           | Copyright (C) 2014-2017 OpenFOAM Foundation
 #    \\/     M anipulation  |
 #------------------------------------------------------------------------------
 # License
@@ -34,6 +34,15 @@
 #------------------------------------------------------------------------------
 Script=${0##*/}
 
+if [ -z "$WM_PROJECT_DIR" ]
+then
+    echo "$Script error: The OpenFOAM environment is not set."
+    echo "    Check the OpenFOAM entries in your dot-files and source them."
+    echo "    If in doubt, please read:"
+    echo "       http://openfoam.org/download/source/setting-environment"
+    exit 1
+fi
+
 usage() {
     exec 1>&2
     while [ "$#" -ge 1 ]; do echo "$1"; shift; done