Add script to update .pot files from mahara source

mahara-langpacks/update-pot.sh

+#!/bin/bash
+
+# Update .pot files
+
+# this is expected to define DATA, and SCRIPTS
+. /etc/mahara-langpacks.conf
+
+if [ ! -w ${DATA} ]; then
+    echo "${DATA} not writable"
+    exit 1
+fi
+
+WORK=${DATA}/templates
+GITDIR=${WORK}/git
+TEMP=${WORK}/temp
+OUT=${DATA}/pot
+
+[ ! -d ${WORK} ] && mkdir ${WORK}
+[ ! -d ${TEMP} ] && mkdir ${TEMP}
+[ ! -d ${OUT} ] && mkdir ${OUT}
+
+remote='git://gitorious.org/mahara/mahara.git'
+
+if [ ! -d ${GITDIR} ]; then
+    echo "git clone ${remote} ${GITDIR}"
+    git clone --quiet ${remote} ${GITDIR}
+fi
+
+cd ${GITDIR}
+git fetch --quiet origin
+
+branches="1.2_STABLE 1.3_STABLE master"
+
+for branch in ${branches} ; do
+    branchexists=`git branch | grep "${branch}$"`
+    if [ -z "${branchexists}" ]; then
+        git checkout -b ${branch} origin/${branch}
+    else
+        git checkout --quiet ${branch}
+        git reset --hard -q origin/${branch}
+    fi
+
+    remotecommit=`git log --pretty=format:"%H" | head -1`
+
+    last=${WORK}/${branch}.last
+    lastruncommit=z
+    if [ -f ${last} ]; then
+        lastruncommit=`cat ${last}`
+    fi
+
+    if [ "$remotecommit" = "$lastruncommit" ] ; then
+        echo "${branch} is up to date"
+    else
+        echo "New commits on ${branch}"
+
+        outputfile=${OUT}/${branch}.pot
+
+        if [ ! -d ${GITDIR}/htdocs ] ; then
+            echo "No htdocs directory in branch ${branch}; skipping."
+            continue
+        fi
+
+        find htdocs -type f -path "*lang/en.utf8*" | xargs tar zcf ${TEMP}/${branch}.tar.gz
+
+        if [ ! -f ${TEMP}/${branch}.tar.gz ] ; then
+            echo "Missing archive ${TEMP}/${branch}.tar.gz; skipping."
+            continue
+        fi
+
+        langpack=${TEMP}/${branch}
+        [ ! -d ${langpack} ] && mkdir ${langpack}
+
+        cd ${langpack}
+        tar zxf ../${branch}.tar.gz
+        cd ${GITDIR}
+
+        if [ ! -d ${langpack}/htdocs ] ; then
+            echo "No htdocs directory in langpack ${langpack}; skipping."
+            continue
+        fi
+
+        echo "Updating ${outputfile}"
+
+        [ -f ${outputfile} ] && rm ${outputfile}
+        /usr/bin/php ${SCRIPTS}/php-po.php ${langpack} ${langpack} ${outputfile}
+
+        echo "${remotecommit}" > ${last}
+    fi
+done
\ No newline at end of file