chore: add support for dotenv var exporting

Script for manual reloading without issuing direnv reload command
should arrive within this week, as I need to check if I borked the CI.

Signed-off-by: Andrei Jiroh Eugenio Halili <[email protected]>

.env.example

@@ -0,0 +1,6 @@
+# This is an example dotenv file for everyone to duplicate as .env. Remember not to
+# commit secrets!
+
+# Change text editors, especially if you're inside an container.
+# EDITOR=nano
+# VISUAL=nano

.envrc

@@ -1,18 +1,24 @@
 #!/usr/bin/env bash
 # shellcheck disable=SC2155
 
-REPO_ROOT="$(git rev-parse --show-toplevel)"
-export PATH="$REPO_ROOT/.gitlab/ci/scripts:$PATH"
+export REPO_ROOT="$(git rev-parse --show-toplevel)"
+export PATH="$REPO_ROOT/.gitlab/ci/scripts:$REPO_ROOT/devkit/bin:$PATH"
 
-# Simulate GitLab CI environment as much as possible.
+# Simulate GitLab CI environment as much as possible. The only problem would be if the URL is SSH clone one.
 export CI_PROJECT_URL=$(git remote get-url origin)
 # https://stackoverflow.com/a/50126161
 export CI_PROJECT_PATH="$(grep -Po '\w\K/\w+[^?]+' <<< "$CI_PROJECT_URL")"
 # https://gist.github.com/oneohthree/f528c7ae1e701ad990e6#gistcomment-2862791
 CI_PROJECT_PATH_SLUG_TMP="$(echo "$CI_PROJECT_PATH" | iconv -t ascii//TRANSLIT | sed -r s/[~\^]+//g | sed -r s/[^a-zA-Z0-9]+/-/g | sed -r s/^-+\|-+$//g | tr A-Z a-z)"
 export CI_PROJECT_PATH_SLUG=${CI_PROJECT_PATH_SLUG_TMP:-"gitpodify-gitpodified-wworkspace-images"}
-# Tip: If you really need to simulate some scripts in an GitLab MR context,
-# touch .emulate-gitlab-mergerequest-pipelines in the root directory of this repo.
+
+# Tip: If you really need to simulate some scripts in an GitLab MR context, touch .emulate-gitlab-mergerequest-pipelines
+# in the root directory of this repo, then `direnv reload`.
 if [[ -f "${REPO_ROOT:-"$PWD"}/.emulate-gitlab-mergerequest-pipelines" ]]; then
   export CI_PIPELINE_SOURCE="merge_request_event"
-fi
+fi
+
+# Export key-value pairs with this magic from dotenv.
+if [ -f .env ]; then
+  export $(echo $(cat ".env" | sed 's/#.*//g'| xargs) | envsubst)
+fi