feat: Change boolean variable behaviour

BREAKING CHANGE: boolean variable now triggered on explicit 'true' value

Signed-off-by: Cédric OLIVIER <cedric3.olivier@orange.com>

README.md

@@ -42,7 +42,7 @@ If no configuration is found, the template will generate one with the following
     * [@semantic-release/release-notes-generator](https://github.com/semantic-release/release-notes-generator)
     * [@semantic-release/gitlab](https://github.com/semantic-release/gitlab)
     * [@semantic-release/git](https://github.com/semantic-release/git)
-    * optional [@semantic-release/changelog](https://github.com/semantic-release/changelog) if `SEMREL_CHANGELOG_ENABLED` is set
+    * optional [@semantic-release/changelog](https://github.com/semantic-release/changelog) if `SEMREL_CHANGELOG_ENABLED` is set to `true`
     * optional [@semantic-release/exec](https://github.com/semantic-release/exec) if any hook script is found (see [hook scripts](#hook_scripts))
 * `branches`: `master`
 
@@ -52,11 +52,11 @@ As specified in the previous chapter, these variables are only used to generated
 
 | Name                          | description                                            | default value |
 | ------------------------------| ------------------------------------------------------ | ------------- |
-| `SEMREL_CHANGELOG_ENABLED`    | Add the [@semantic-release/changelog](https://github.com/semantic-release/changelog) plugin which will commit a changelog file in the repository. | _none_ |
+| `SEMREL_CHANGELOG_ENABLED`    | Add the [@semantic-release/changelog](https://github.com/semantic-release/changelog) plugin which will commit a changelog file in the repository if set to `true`. | _none_ |
 | `SEMREL_CHANGELOG_FILE`    | [changelogFile @semantic-release/changelog option](https://github.com/semantic-release/changelog#options). | _none_ (use the plugin default value which is `CHANGELOG.md`). |
 | `SEMREL_CHANGELOG_TITLE`   | [changelogTitle @semantic-release/changelog option](https://github.com/semantic-release/changelog#options). You might want to use markdown format (for example `# MyApp Changelog`). | _none_ |
 | `SEMREL_DRY_RUN`              | Activate the [dryRun semantic-release option](https://github.com/semantic-release/semantic-release/blob/master/docs/usage/configuration.md#dryrun) if present. | _none_ |
-| `SEMREL_AUTO_RELEASE_ENABLED` | When set the job start automatically. When not set (default), the job is manual. | _none_ |
+| `SEMREL_AUTO_RELEASE_ENABLED` | When set to `true` the job start automatically. When not set (default), the job is manual. | _none_ |
 | `SEMREL_TAG_FORMAT`           | [tagFormat semantic-release option](https://github.com/semantic-release/semantic-release/blob/master/docs/usage/configuration.md#tagformat). :warning: don't forget to double the `$` character so it is not interpreted by GitLab.                   | `$${version}` |
 | `SEMREL_HOOKS_DIR`             | [Hook scripts](#hook_scripts) folder. | `.` |
 | `SEMREL_RELEASE_DISABLED`      | Disable this job. | _none_ |

templates/gitlab-ci-semrel.yml

@@ -337,7 +337,7 @@ stages:
 
   # this script console output is inserted in generated file: DO NOT ADD LOGS
   function generate_changelog_plugin_conf() {
-    if [[ -n "${SEMREL_CHANGELOG_ENABLED}" ]]; then
+    if [[ "${SEMREL_CHANGELOG_ENABLED}" = "true" ]]; then
       if [[ -n "${SEMREL_CHANGELOG_FILE}" ]] || [[ -n "${SEMREL_CHANGELOG_TITLE}" ]]; then
         if [[ -n "${SEMREL_CHANGELOG_FILE}" ]]; then
           changeLogConfig="changelogFile: '${SEMREL_CHANGELOG_FILE}'"
@@ -359,7 +359,7 @@ stages:
   function generate_git_plugin_conf() {
     # git plugin has default changelog file as asset by default so 
     # we need to add it explicitly if the user configured a custom changelogFile
-    if [[ -n "${SEMREL_CHANGELOG_ENABLED}" ]] && [[ -n "${SEMREL_CHANGELOG_FILE}" ]]; then
+    if [[ "${SEMREL_CHANGELOG_ENABLED}" = "true" ]] && [[ -n "${SEMREL_CHANGELOG_FILE}" ]]; then
       echo "  - - '@semantic-release/git'"
       echo "    - assets:"
       echo "      - '${SEMREL_CHANGELOG_FILE}'"
@@ -518,7 +518,7 @@ stages:
     fi
   }
 
-  if [[ -z "$TEMPLATE_CHECK_UPDATE_DISABLED" ]]; then check_for_update semrel "1.2.0"; fi
+  if [[ "$TEMPLATE_CHECK_UPDATE_DISABLED" != "true" ]]; then check_for_update semrel "1.2.0"; fi
   unscope_variables
   eval_all_secrets
 
@@ -559,10 +559,10 @@ semantic-release:
     - prepare_semantic_release
     - semantic-release --ci ${SEMREL_DRY_RUN+-d}
   rules:
-    - if: $SEMREL_RELEASE_DISABLED
+    - if: '$SEMREL_RELEASE_DISABLED == "true"'
       when: never
     # on production branch(es): auto if SEMREL_AUTO_RELEASE_ENABLED
-    - if: '$SEMREL_AUTO_RELEASE_ENABLED && $CI_COMMIT_REF_NAME =~ $PROD_REF'
+    - if: '$SEMREL_AUTO_RELEASE_ENABLED == "true" && $CI_COMMIT_REF_NAME =~ $PROD_REF'
     # on production branch(es): manual by default
     - if: '$CI_COMMIT_REF_NAME =~ $PROD_REF'
       when: manual