Improve the generic freecol script.

packaging/common/freecol

@@ -1,3 +0,0 @@
-#!/bin/sh
-
-java -Xmx512M -jar FreeCol.jar $1 $2 $3 $4 $5 $6 $7 $8 $9

packaging/common/freecol.sh

@@ -0,0 +1,79 @@
+#! /bin/sh
+# Generic freecol start script.
+# Please customize this for your distribution.
+# Look at the ../debian script for other ideas, they are clueful.
+#
+# Things this script needs to do:
+# - Find the freecol data directory.
+#     It is usually called "data".
+#     Try to allow the --freecol-data command line override to work.
+#     This script allows a FREECOL_DATA environment variable override,
+#     tries the obvious directories, and puts the result in FCDAT.
+# - Find the freecol .jar.
+#     It is usually called "FreeCol.jar".
+#     This script allows a FREECOL_JAR environment variable override,
+#     tries the obvious directories, and puts the result in FCJAR.
+# - Find the java binary.
+#     This script assumes it is "java".
+#     If not, fix the last line.
+#
+BINDIR=`dirname "$0"`
+FREECOLDATA="data"
+FREECOLJAR="FreeCol.jar"
+
+# Find the data directory, put it in FCDAT.
+FCDAT=""
+# Is the data directory supplied in the command line args?
+for x in $@ ; do
+    if test "x$x" = "x--freecol-data" ; then
+        FCDAT="DONTSET!"
+        break
+    fi
+done
+# - Is there a credible FREECOL_DATA environment variable?
+if test "x${FCDAT}" = "x" ; then
+    if test "x${FREECOL_DATA}" != "x" -a -d "${FREECOL_DATA}" ; then
+        FCDAT="${FREECOL_DATA}"
+# - Is it in the current directory?
+    elif test -d "${FREECOLDATA}" ; then
+        FCDAT="DONTSET!"
+# - Is it where this script is?
+    elif test -d "${BINDIR}/${FREECOLDATA}" ; then
+        FCDAT="${BINDIR}/${FREECOLDATA}"
+# - Is it in a likely linux FHS place?
+    elif test -d "/usr/share/freecol/data" ; then
+        FCDAT="/usr/share/freecol/data"
+# Give up.
+    else
+        echo "can not find freecol data directory" >&2
+        exit 1
+    fi
+fi
+
+# Find the freecol jar, put it in FCJAR.
+FCJAR=""
+# - Is there a credible FREECOL_JAR environment variable?
+if test "x${FREECOL_JAR}" != "x" -a -r "${FREECOL_JAR}" ; then
+    FCJAR="${FREECOL_JAR}"
+# - Is it in the current directory?
+elif test -r "${FREECOLJAR}" ; then
+    FCJAR="${FREECOLJAR}"
+# - Is it where this script is?
+elif test -r "${BINDIR}/${FREECOLJAR}" ; then
+    FCJAR="${BINDIR}/${FREECOLJAR}"
+# - Is it in a likely linux FHS place?
+elif test -d "/usr/share/java/${FREECOLJAR}" ; then
+    FCJAR="/usr/share/java/${FREECOLJAR}"
+# Give up.
+else
+    echo "can not find ${FREECOLJAR}" >&2
+    exit 1
+fi
+
+# Clean up the data argument and run.
+if test "x${FCDAT}" = "xDONTSET!" ; then
+    FCDAT=""
+else
+    FCDAT="--freecol-data ${FCDAT}"
+fi
+exec java -Xmx512M -jar "${FCJAR}" "${FCDAT}" ${1+"$@"}