From 2af2c3a3b5387c577801b165ecd749fe782fddb9 Mon Sep 17 00:00:00 2001
From: Pierre Riteau <pierre@stackhpc.com>
Date: Wed, 31 Mar 2021 14:56:53 +0200
Subject: [PATCH] Support reading Kayobe environment name from file

If using separate branches for each environment, it can be useful to
read the environment name from a file committed to each branch. Or, if
sharing the same branch for all environments, it can be useful to set
the default environment to one with lower impact, e.g. dev or staging.

If no --environment option is specified and a .environment file exists
at the root of the directory, use its content as KAYOBE_ENVIRONMENT.

Change-Id: I22b2b466e47a3b4d96931d754a4de7544f0ada5d
---
 kayobe-env | 38 ++++++++++++++++++++++++--------------
 1 file changed, 24 insertions(+), 14 deletions(-)

diff --git a/kayobe-env b/kayobe-env
index 8719485..5137927 100644
--- a/kayobe-env
+++ b/kayobe-env
@@ -33,6 +33,23 @@ base_path=$(realpath $KAYOBE_CONFIG_ROOT/../../)
 export KOLLA_SOURCE_PATH=${KOLLA_SOURCE_PATH:-${base_path}/src/kolla-ansible}
 export KOLLA_VENV_PATH=${KOLLA_VENV_PATH:-${base_path}/venvs/kolla-ansible}
 
+function check_and_export_env {
+  # Look for existing Kayobe environments
+  if [ -d "${KAYOBE_CONFIG_PATH}/environments" ]; then
+    if [ -d "${KAYOBE_CONFIG_PATH}/environments/${kayobe_env}" ]; then
+      export KAYOBE_ENVIRONMENT="${kayobe_env}"
+      echo "Using Kayobe environment ${KAYOBE_ENVIRONMENT}"
+      return 0
+    else
+      echo "Unable to find Kayobe environment ${kayobe_env} in ${KAYOBE_CONFIG_PATH}/environments"
+      return 1
+    fi
+  else
+    echo "Cannot find environments folder in ${KAYOBE_CONFIG_PATH}"
+    return 1
+  fi
+}
+
 function usage {
   echo "usage: ${BASH_SOURCE[0]:-${(%):-%x}} [--environment <env-name>]"
   return 1
@@ -41,21 +58,14 @@ function usage {
 if [ "$#" -ge 1 ]; then
   if [ "$1" = "--environment" -a "$#" -eq 2 ]; then
     kayobe_env="$2"
-    # Look for existing Kayobe environments
-    if [ -d "${KAYOBE_CONFIG_PATH}/environments" ]; then
-      if [ -d "${KAYOBE_CONFIG_PATH}/environments/${kayobe_env}" ]; then
-        export KAYOBE_ENVIRONMENT="${kayobe_env}"
-        echo "Using Kayobe environment ${KAYOBE_ENVIRONMENT}"
-        return 0
-      else
-        echo "Unable to find Kayobe environment ${kayobe_env} in ${KAYOBE_CONFIG_PATH}/environments"
-        return 1
-      fi
-    else
-      echo "Cannot find environments folder in ${KAYOBE_CONFIG_PATH}"
-      return 1
-    fi
+    check_and_export_env
   else
     usage
   fi
+  return $?
+fi
+
+if [[ -f "$KAYOBE_CONFIG_ROOT/.environment" ]]; then
+  kayobe_env=$(cat "$KAYOBE_CONFIG_ROOT/.environment")
+  check_and_export_env
 fi