Update action code

src/main.ts

@@ -1,14 +1,38 @@
 import * as core from '@actions/core'
-import {wait} from './wait'
+import * as exec from '@actions/exec'
+import * as github from '@actions/github'
 
 async function run(): Promise<void> {
   try {
-    const ms: string = core.getInput('milliseconds')
-    core.debug(`Waiting ${ms} milliseconds ...`) // debug is only output if you set the secret `ACTIONS_STEP_DEBUG` to true
+    const deployedRevision = core.getInput('deployed_revision')
+    if (!deployedRevision) {
+      throw new Error('deployed_revision is required!')
+    }
+    core.debug(`Deployed revision: ${deployedRevision}`)
 
-    core.debug(new Date().toTimeString())
-    await wait(parseInt(ms, 10))
-    core.debug(new Date().toTimeString())
+    const nextRevision = core.getInput('next_revision') || github.context.sha
+    core.debug(`Next revision: ${nextRevision}`)
+
+    try {
+      exec.exec('git', ['log', deployedRevision])
+      exec.exec('git', ['log', nextRevision])
+    } catch (error) {
+      core.warning(
+        `One of the revisions doesnt exists, returning empty lists${
+          error instanceof Error ? `: ${error.message}` : ''
+        }`
+      )
+      return
+    }
+
+    const newCommitsCount = getNumberOrCommits(deployedRevision, nextRevision)
+    const removedCommitsCount = getNumberOrCommits(
+      nextRevision,
+      deployedRevision
+    )
+
+    core.info(newCommitsCount.toString())
+    core.info(removedCommitsCount.toString())
 
     core.setOutput('time', new Date().toTimeString())
   } catch (error) {
@@ -17,3 +41,16 @@ async function run(): Promise<void> {
 }
 
 run()
+
+function getNumberOrCommits(base: string, head: string): number {
+  let count = 0
+  exec.exec('git', ['log', `${base}..${head}`], {
+    listeners: {
+      stdline(line) {
+        count++
+        core.info(line)
+      }
+    }
+  })
+  return count
+}