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+// Parameters made available from Jenkins job configuration:
+//   CONDA_INSTALLER_VERSION
+//   CONDA_VERSION
+//   aux_packages
+
+this.py_maj_version = "3"
+// The conda installer script to use for various <OS><py_version> combinations.
+this.conda_installers  = ["Linux-py2":"Miniconda2-${CONDA_INSTALLER_VERSION}-Linux-x86_64.sh",
+                          "Linux-py3":"Miniconda3-${CONDA_INSTALLER_VERSION}-Linux-x86_64.sh",
+                          "MacOSX-py2":"Miniconda2-${CONDA_INSTALLER_VERSION}-MacOSX-x86_64.sh",
+                          "MacOSX-py3":"Miniconda3-${CONDA_INSTALLER_VERSION}-MacOSX-x86_64.sh"]
+
+this.CONDA_BASE_URL = "https://repo.continuum.io/miniconda"
+// TODO: Consolidate in shared lib for convenience.
+//if (this.CONDA_BASE_URL[-1..-1] == "/") {
+//    this.CONDA_BASE_URL = [0..-2]
+//}
+
+
+def gen_specfiles(label) {
+    
+    node(label) {
+    
+        env.PYTHONPATH = ""
+        // Make the log a bit more deterministic
+        env.PYTHONUNBUFFERED = "true"
+        def WORKDIR=pwd()
+    
+        // Delete any existing job workspace directory contents.
+        // The directory deleted is the one named after the jenkins pipeline job.
+        deleteDir()
+
+        def OSname = null
+        def uname = sh(script: "uname", returnStdout: true).trim()
+        if (uname == "Darwin") {
+            OSname = "MacOSX"
+            println("OSname=${OSname}")
+        }
+        if (uname == "Linux") {
+            OSname = uname
+            println("OSname=${OSname}")
+        }
+        assert uname != null
+        
+        // Provide an isolated home directory unique to this build.
+        sh "mkdir home"
+        def HOME = "${WORKDIR}/home"
+        
+        // Check for the availability of a download tool and then use it
+        // to get the conda installer.
+        def dl_cmds = ["curl -OSs",
+                       "wget --no-verbose --server-response --no-check-certificate"]
+        def dl_cmd = null
+        def stat1 = 999
+        for (cmd in dl_cmds) {
+            stat1 = sh(script: "which ${cmd.tokenize()[0]}", returnStatus: true)
+            if( stat1 == 0 ) {
+                dl_cmd = cmd
+                break
+            }
+        }
+        if (stat1 != 0) {
+            println("Could not find a download tool. Unable to proceed.")
+            sh "false"
+        }
+        
+        def conda_install_dir = "${WORKDIR}/miniconda"
+        def conda_installer =
+            this.conda_installers["${OSname}-py${this.py_maj_version}"]
+        dl_cmd = dl_cmd + " ${CONDA_BASE_URL}/${conda_installer}"
+        sh dl_cmd    
+        
+        // Install specific version of miniconda
+        sh "bash ./${conda_installer} -b -p ${conda_install_dir}"
+        PATH = "${conda_install_dir}/bin:${PATH}"
+        def cpkgs = "conda=${CONDA_VERSION}"
+        
+        def pkg_list = aux_packages.replaceAll('\n', ' ')
+        withEnv(["PATH=${PATH}"]) {
+            sh "conda install --quiet --yes ${cpkgs}"
+
+            // Generate spec files
+            sh "./mktestenv.sh -n 2018.1 -p 3.5 -i 1 ${pkg_list}"
+            sh "./mktestenv.sh -n 2018.1 -p 3.6 -i 1 ${pkg_list}"
+       
+            // Make spec files available to master node. 
+            stash name: "spec-stash-${OSname}", includes: "hstdp*.txt"
+        }
+    }
+}
+
+// Run the above function for each platform in parallel.
+stage('create specfiles') {
+    parallel( 
+        Linux: { gen_specfiles('RHEL-6') },
+        MacOS: { gen_specfiles('OSX-10.11') }
+    )
+}
+
+node('boyle.stsci.edu') {
+  stage('archive') {
+    // Retrieve the spec files from the nodes where they were created.
+    unstash "spec-stash-Linux"
+    unstash "spec-stash-MacOSX"
+    archive "hstdp*txt"
+  }
+}