Generates Jenkins job from template for Mercurial repos

gistfile1.sh

#!/bin/bash

set -e

[ "x${JENKINS_URL}" == "x" ] && JENKINS_URL=http://127.0.0.1/jenkins/
JENKINS_USER=YourJenkinsUser
JENKINS_PASS=YourPass
XML=`which xmlstarlet` || { echo "please install xmlstarlet and try again"; exit 2; }

isJavaAvail(){ # find java
if [ "x${JAVA_HOMa}" != "x" ]; then JAVA_CMD="${JAVA_HOME}/bin/java/"
else
  for candidate in /etc/alternatives/java /usr/lib/jvm/java-1.6.0/bin/java /usr/lib/jvm/jre-1.6.0/bin/java /usr/lib/jvm/java-1.5.0/bin/java /usr/lib/jvm/jre-1.5.0/bin/java /usr/bin/java
    do
    [ -x "$JAVA_CMD" ] && break
     JAVA_CMD="$candidate"
    done
fi
[ -x "$JAVA_CMD" ] || { printf "[ $FUNCNAME ] no java found, exiting $0 \n"; exit 2; } && printf "[ $FUNCNAME ] Using java executable Found in: $JAVA_CMD \n"
}

execJenkinsCli(){ # excute jenkins-cli jar 
        jenkins_clinet_jar=./jenkins-cli.jar
        # download only if it's newwer than the local version [ curl -z ], the cli jar should be of the same jenkins version ...
        curl -s -z ./jenkins-cli.jar ${JENKINS_URL}/jnlpJars/jenkins-cli.jar -o ${jenkins_clinet_jar} || { echo "Echo  cannot obtain jenkins-cli.jar exiting"; exit 2;}
        cli_cmd=$1
        cmd_params=$2
        cmd_prefix="${JAVA_CMD} -jar ${jenkins_clinet_jar} -s ${JENKINS_URL}"

        ${cmd_prefix} who-am-i | grep 'Authenticated as: anonymous' &>/dev/null && anon=0
        #anon=$?
        if [ "$anon" != "0" ]; then
                #printf "[ $FUNCNAME ] using jenkins-cli with private key auth"
                exec ${cmd_prefix} ${cli_cmd} ${cmd_params}
        elif [ "x" = "x${JENKINS_USER}" ] || [ "x"  = "x${JENKINS_PASS}" ]; then
                printf "[ $FUNCNAME ] cannot determin jenkins credentials\n";
                exit 3;
        else
                exec ${cmd_prefix} ${cli_cmd} ${cmd_params} --username ${JENKINS_USER} --password ${JENKINS_PASS}
        fi
}

generateJob(){ # generates a jenkins job
        if [ $# -lt 2 ] ; then
          echo  ""
          exit 1
        fi
        new_job_name=${1}
        tmpl_job_name=${2}
        scm_url=${3}
        http_url=${4}
        fork_url=${5}
        execJenkinsCli get-job ${tmpl_job_name}  | ${XML} ed -O -S -P -u '//project/scm/source' -v ${scm_url} | ${XML} ed -O -S -P -u '//project/scm/browser/url' -v ${http_url} | ${XML} ed -O -S -P -u '//project/builders/hudson.tasks.Maven/properties' -v ${fork_url} | execJenkinsCli create-job ${new_job_name}
        execJenkinsCli enable-job ${new_job_name}
}
isJavaAvail
generateJob "$@"

Create a template job [preferably keep it disabled so if it has SCM triggers it doesn't start on any scm change ...]
Create a job which will generate the jobs for you with parameters see this gist