Remove dependency on the runner's volume (#244)

* bump actions

* experiment using init container to prepare working environment

* rm script before continuing

* fix

* Update packages/k8s/src/hooks/run-script-step.ts

Co-authored-by: Copilot <[email protected]>

* leverage exec stat instead of printf

* npm update

* document the new constraint

---------

Co-authored-by: DenisPalnitsky <[email protected]>

packages/k8s/src/hooks/run-script-step.ts

@@ -2,17 +2,18 @@
 import * as fs from 'fs'
 import * as core from '@actions/core'
 import { RunScriptStepArgs } from 'hooklib'
-import { execPodStep } from '../k8s'
-import { writeEntryPointScript } from '../k8s/utils'
+import { execCpFromPod, execCpToPod, execPodStep } from '../k8s'
+import { writeRunScript, sleep, listDirAllCommand } from '../k8s/utils'
 import { JOB_CONTAINER_NAME } from './constants'
+import { dirname } from 'path'
 
 export async function runScriptStep(
   args: RunScriptStepArgs,
-  state,
-  responseFile
+  state
 ): Promise<void> {
+  // Write the entrypoint first. This will be later coppied to the workflow pod
   const { entryPoint, entryPointArgs, environmentVariables } = args
-  const { containerPath, runnerPath } = writeEntryPointScript(
+  const { containerPath, runnerPath } = writeRunScript(
     args.workingDirectory,
     entryPoint,
     entryPointArgs,
@@ -20,6 +21,12 @@ export async function runScriptStep(
     environmentVariables
   )
 
+  const workdir = dirname(process.env.RUNNER_WORKSPACE as string)
+  const containerTemp = '/__w/_temp'
+  const runnerTemp = `${workdir}/_temp`
+  await execCpToPod(state.jobPod, runnerTemp, containerTemp)
+
+  // Execute the entrypoint script
   args.entryPoint = 'sh'
   args.entryPointArgs = ['-e', containerPath]
   try {
@@ -33,6 +40,19 @@ export async function runScriptStep(
     const message = (err as any)?.response?.body?.message || err
     throw new Error(`failed to run script step: ${message}`)
   } finally {
-    fs.rmSync(runnerPath)
+    try {
+      fs.rmSync(runnerPath, { force: true })
+    } catch (removeErr) {
+      core.debug(`Failed to remove file ${runnerPath}: ${removeErr}`)
+    }
+  }
+
+  try {
+    core.debug(
+      `Copying from job pod '${state.jobPod}' ${containerTemp} to ${runnerTemp}`
+    )
+    await execCpFromPod(state.jobPod, containerTemp, workdir)
+  } catch (error) {
+    core.warning('Failed to copy _temp from pod')
   }
 }