1 files changed, 53 insertions, 0 deletions
diff --git a/plugins/cmd2_ext_test/build-pyenvs.sh b/plugins/cmd2_ext_test/build-pyenvs.sh
new file mode 100644
index 00000000..39c28aa1
--- /dev/null
+++ b/plugins/cmd2_ext_test/build-pyenvs.sh
@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+#
+
+# create pyenv environments for each minor version of python
+# supported by this project
+#
+# this script uses terms from Semantic Versioning https://semver.org/
+# version numbers are: major.minor.patch
+#
+# this script will delete and recreate existing virtualenvs named
+# cmd2-3.7, etc. It will also create a .python-version
+#
+# Prerequisites:
+#   - *nix-ish environment like macOS or Linux
+#   - pyenv installed
+#   - pyenv-virtualenv installed
+#   - readline and openssl libraries installed so pyenv can
+#     build pythons
+#
+
+# Make a array of the python minor versions we want to install.
+# Order matters in this list, because it's the order that the
+# virtualenvs will be added to '.python-version'. Feel free to modify
+# this list, but note that this script intentionally won't install
+# dev, rc, or beta python releases
+declare -a pythons=("3.7" "3.6" "3.5" "3.4")
+
+# function to find the latest patch of a minor version of python
+function find_latest_version {
+    pyenv install -l | \
+    sed -En -e "s/^ *//g" -e "/(dev|b|rc)/d" -e "/^$1/p" | \
+    tail -1
+}
+
+# empty out '.python-version'
+> .python-version
+
+# loop through the pythons
+for minor_version in "${pythons[@]}"
+do
+    patch_version=$( find_latest_version "$minor_version" )
+    # use pyenv to install the latest versions of python
+    # if it's already installed don't install it again
+    pyenv install -s "$patch_version"
+
+    envname="cmd2-$minor_version"
+    # remove the associated virtualenv
+    pyenv uninstall -f "$envname"
+    # create a new virtualenv
+    pyenv virtualenv -p "python$minor_version" "$patch_version" "$envname"
+    # append the virtualenv to .python-version
+    echo "$envname" >> .python-version
+done