Rename 'functions' directory to 'internal'

src/internal/context.js

@@ -0,0 +1,30 @@
+const core = require('@actions/core')
+
+// Load variables from Actions runtime
+function getRequiredVars() {
+  return {
+    runTimeUrl: process.env.ACTIONS_RUNTIME_URL,
+    workflowRun: process.env.GITHUB_RUN_ID,
+    runTimeToken: process.env.ACTIONS_RUNTIME_TOKEN,
+    repositoryNwo: process.env.GITHUB_REPOSITORY,
+    buildVersion: process.env.GITHUB_SHA,
+    buildActor: process.env.GITHUB_ACTOR,
+    actionsId: process.env.GITHUB_ACTION,
+    githubToken: core.getInput('token'),
+    githubApiUrl: process.env.GITHUB_API_URL ?? 'https://api.github.com',
+    githubServerUrl: process.env.GITHUB_SERVER_URL ?? 'https://github.com',
+    artifactName: core.getInput('artifact_name') || 'github-pages',
+    isPreview: core.getInput('preview') === 'true'
+  }
+}
+
+module.exports = function getContext() {
+  const requiredVars = getRequiredVars()
+  for (const variable in requiredVars) {
+    if (requiredVars[variable] === undefined) {
+      throw new Error(`${variable} is undefined. Cannot continue.`)
+    }
+  }
+  core.debug('all variables are set')
+  return requiredVars
+}