make git version available as a read-only advanced preference. I sure

hope I never need to ask a user to transcribe this!

xwords4/android/XWords4/res/values/strings.xml

@@ -326,4 +326,6 @@
 	<string name="playerf">Player %d</string>
 	<string name="initial_game_minutes">Game time (minutes)</string>
 
+	<string name="git_rev_title">Source version id</string>
+
 </resources>

xwords4/android/XWords4/res/xml/xwprefs.xml

@@ -147,5 +147,10 @@
                           android:title="@string/dict_host"
                           android:defaultValue="@string/dict_url"
                           />
+
+      <EditTextPreference android:title="@string/git_rev_title"
+                          android:summary="@string/git_rev_gen"
+                          android:enabled="false"
+                          />
     </PreferenceScreen>
 </PreferenceScreen>

xwords4/android/scripts/genvers.sh

@@ -3,22 +3,22 @@
 cd $(dirname $0)
 cd ../../
 
-SVNVERSION=$(svnversion)
-if [ -z "$SVNVERSION" -o "$SVNVERSION" = "exported" ]; then
-    SVNVERSION=$(git svn find-rev $(git log -1 --pretty=format:%H 2>/dev/null) \
-        2>/dev/null)
-    if git status | grep -q modified; then
-        SVNVERSION=${SVNVERSION}M
-    fi
-fi
+GITVERSION=$(scripts/gitversion.sh)
 
-cat <<EOF > android/XWords4/src/org/eehouse/android/xw4/SvnVersion.java
-// auto-generated; do not edit
-package org.eehouse.android.xw4;
-class SvnVersion {
-    public static final String VERS = "$SVNVERSION";
-}
+# TODO: deal with case where there's no hash available -- exported
+# code maybe?  Better: gitversion.sh does that.
+
+cat <<EOF > android/XWords4/res/values/git_string.xml
+<?xml version="1.0" encoding="utf-8"?>
+<!-- auto-generated; do not edit -->
+
+<resources>
+    <string name="git_rev_gen">$GITVERSION</string>
+</resources>
 EOF
 
-# touch the file that depends on VERS.java
-touch android/XWords4/src/org/eehouse/android/xw4/Utils.java
+# touch the files that depend on git_string.xml.  (I'm not sure that
+# this list is complete or if ant and java always get dependencies
+# right.  Clean builds are the safest.)
+touch android/XWords4/res/xml/xwprefs.xml 
+touch android/XWords4/gen/org/eehouse/android/xw4/R.java