Add script which creates env setup script

hlrs-plumbing/scripts/xx_create_release_env.sh

@@ -0,0 +1,78 @@
+#!/bin/bash
+#
+# Creates a script which can be used to source the environment variables 
+# for a release in <base_prefix>/release/<release_tag> tagged as <release_tag>.
+#
+# Input arguments:
+#   - release_tag:   tag/branch/commit in repo
+#   - base_prefix:   prefix to base directory for softweare installation; e.g. /opt/hlrs
+#
+
+_VERBOSITY=1
+
+if [[ "$#" -ne 2 ]]; then
+  echo "Syntax: $0 release_tag base_prefix"
+  echo "Creates a script which can be used to source the environment variables "
+  echo "for a release in <base_prefix>/release/<release_tag> tagged as <release_tag>."
+  exit 1
+fi
+
+
+arg_tag=$1
+arg_prefix=$2
+
+log () {
+    local msg=$1
+    if [[ -n $_VERBOSITY ]]; then 
+        echo $msg
+    fi
+}
+
+# modify tag by stripping "hlrs-release-" prefix
+canonize_tag () {
+    echo ${1##hlrs-release-}
+}
+
+# create and prepare destination directory
+# or return existing directory
+create_dir () {
+    local dir=$1
+    local rc
+
+    if [[ -d $dir ]]; then
+        rc=$dir
+    else
+        mkdir -p $dir
+        chmod g=u $dir
+        rc=$dir
+    fi
+    echo $rc
+}
+
+
+# process input arguments
+HLRS_SOFTWARE_STACK_RELEASE_VERSION__USER=$(canonize_tag $arg_tag)
+HLRS_OPT_PREFIX__USER=$(create_dir $arg_prefix)
+
+# Define various repo locations
+_HLRS_SPACK_REPO=file://$HOME/spack-test/dummy_repo/spack-v0.21.2.git
+_HLRS_SPACK_PLUMBING_REPO=file://$HOME/spack-test/dummy_repo/software-stack-plumbing.git
+_HLRS_SPACK_CONFIG_REPO=
+
+# bootstrap environment variables 
+# (using [bash process substitution](https://tldp.org/LDP/abs/html/process-sub.html))
+source <(curl $_HLRS_SPACK_PLUMBING_REPO/hlrs-plumbing/envs/00_base_prefix.env)
+source <(curl $_HLRS_SPACK_PLUMBING_REPO/hlrs-plumbing/envs/01_release_root.env)
+source <(curl $_HLRS_SPACK_PLUMBING_REPO/hlrs-plumbing/envs/02_hlrs_spack_root.env)
+
+# destination for output script
+destination=$HLRS_SOFTWARE_STACK_RELEASE_ROOT/setup-release-variables.env
+
+# write environment variables to file for sourcing
+echo "# Setup environment variables for the release" > $destination
+echo "#" >> $destination
+echo ""  >> $destination
+echo "export HLRS_SOFTWARE_STACK_HLRS_SPACK_ROOT=${HLRS_SOFTWARE_STACK_HLRS_SPACK_ROOT}" >> $destination
+echo "export HLRS_SOFTWARE_STACK_SPACK_INSTALL_TREE=${HLRS_SOFTWARE_STACK_SPACK_INSTALL_TREE}" >> $destination
+echo "export HLRS_SOFTWARE_STACK_RELEASE_VERSION=${HLRS_SOFTWARE_STACK_RELEASE_VERSION}" >> $destination
+echo "export HLRS_SOFTWARE_STACK_RELEASE_ROOT=${HLRS_SOFTWARE_STACK_RELEASE_ROOT}" >> $destination