fix: Correct handling of empty variables set via ENV variables. These… (

#19)

* fix: Correct handling of empty variables set via ENV variables. These were converted to empty strings instead of null.

* ignore: Spelling

* ignore: Added `.editorconfig`

.editorconfig

@@ -0,0 +1,4 @@
+[*.{kt,kts}]
+ktlint_disabled_rules = no-wildcard-imports
+ij_kotlin_allow_trailing_comma_on_call_site = false
+ij_kotlin_allow_trailing_comma = false

README.md

@@ -6,4 +6,4 @@ A CLI project for sending slack messages usable in GitHub workflows.
 
 Typically you do not use this directly but via the [slack-notifier-cli-action](https://github.com/monta-app/slack-notifier-cli-action)
 
-Most project don't use this directly, but indirectly through the [github-workflows](https://github.com/monta-app/github-workflows)
+Most projects don't use this directly, but indirectly through the [github-workflows](https://github.com/monta-app/github-workflows)

src/commonMain/kotlin/com/monta/slack/notifier/command/PublishSlackCommand.kt

@@ -53,16 +53,22 @@ class PublishSlackCommand : CliktCommand() {
     override fun run() {
         runBlocking {
             PublishSlackService(
-                serviceName = serviceName,
-                serviceEmoji = serviceEmoji,
+                serviceName = serviceName.valueOrNull(),
+                serviceEmoji = serviceEmoji.valueOrNull(),
                 slackToken = slackToken,
                 slackChannelId = slackChannelId
             ).publish(
                 githubContext = githubContext,
                 jobType = JobType.fromString(jobType),
                 jobStatus = JobStatus.fromString(jobStatus),
-                slackMessageId = slackMessageId
+                slackMessageId = slackMessageId.valueOrNull()
             )
         }
     }
+
+    /**
+     * Needed for optional parameters as the return the empty string instead of null
+     * if set via ENV variables (as we do from our GitHub Actions)
+     */
+    private fun String?.valueOrNull() = if (this.isNullOrBlank()) null else this
 }