Add save-state and set-output file commands

packages/core/__tests__/core.test.ts

@@ -260,24 +260,82 @@ describe('@actions/core', () => {
     )
   })
 
-  it('setOutput produces the correct command', () => {
+  it('legacy setOutput produces the correct command', () => {
     core.setOutput('some output', 'some value')
     assertWriteCalls([
       os.EOL,
       `::set-output name=some output::some value${os.EOL}`
     ])
   })
 
-  it('setOutput handles bools', () => {
+  it('legacy setOutput handles bools', () => {
     core.setOutput('some output', false)
     assertWriteCalls([os.EOL, `::set-output name=some output::false${os.EOL}`])
   })
 
-  it('setOutput handles numbers', () => {
+  it('legacy setOutput handles numbers', () => {
     core.setOutput('some output', 1.01)
     assertWriteCalls([os.EOL, `::set-output name=some output::1.01${os.EOL}`])
   })
 
+  it('setOutput produces the correct command and sets the output', () => {
+    const command = 'OUTPUT'
+    createFileCommandFile(command)
+    core.setOutput('my out', 'out val')
+    verifyFileCommand(
+      command,
+      `my out<<${DELIMITER}${os.EOL}out val${os.EOL}${DELIMITER}${os.EOL}`
+    )
+  })
+
+  it('setOutput handles boolean inputs', () => {
+    const command = 'OUTPUT'
+    createFileCommandFile(command)
+    core.setOutput('my out', true)
+    verifyFileCommand(
+      command,
+      `my out<<${DELIMITER}${os.EOL}true${os.EOL}${DELIMITER}${os.EOL}`
+    )
+  })
+
+  it('setOutput handles number inputs', () => {
+    const command = 'OUTPUT'
+    createFileCommandFile(command)
+    core.setOutput('my out', 5)
+    verifyFileCommand(
+      command,
+      `my out<<${DELIMITER}${os.EOL}5${os.EOL}${DELIMITER}${os.EOL}`
+    )
+  })
+
+  it('setOutput does not allow delimiter as value', () => {
+    const command = 'OUTPUT'
+    createFileCommandFile(command)
+
+    expect(() => {
+      core.setOutput('my out', `good stuff ${DELIMITER} bad stuff`)
+    }).toThrow(
+      `Unexpected input: value should not contain the delimiter "${DELIMITER}"`
+    )
+
+    const filePath = path.join(__dirname, `test/${command}`)
+    fs.unlinkSync(filePath)
+  })
+
+  it('setOutput does not allow delimiter as name', () => {
+    const command = 'OUTPUT'
+    createFileCommandFile(command)
+
+    expect(() => {
+      core.setOutput(`good stuff ${DELIMITER} bad stuff`, 'test')
+    }).toThrow(
+      `Unexpected input: name should not contain the delimiter "${DELIMITER}"`
+    )
+
+    const filePath = path.join(__dirname, `test/${command}`)
+    fs.unlinkSync(filePath)
+  })
+
   it('setFailed sets the correct exit code and failure message', () => {
     core.setFailed('Failure message')
     expect(process.exitCode).toBe(core.ExitCode.Failure)
@@ -443,21 +501,79 @@ describe('@actions/core', () => {
     assertWriteCalls([`::debug::%0D%0Adebug%0A${os.EOL}`])
   })
 
-  it('saveState produces the correct command', () => {
+  it('legacy saveState produces the correct command', () => {
     core.saveState('state_1', 'some value')
     assertWriteCalls([`::save-state name=state_1::some value${os.EOL}`])
   })
 
-  it('saveState handles numbers', () => {
+  it('legacy saveState handles numbers', () => {
     core.saveState('state_1', 1)
     assertWriteCalls([`::save-state name=state_1::1${os.EOL}`])
   })
 
-  it('saveState handles bools', () => {
+  it('legacy saveState handles bools', () => {
     core.saveState('state_1', true)
     assertWriteCalls([`::save-state name=state_1::true${os.EOL}`])
   })
 
+  it('saveState produces the correct command and saves the state', () => {
+    const command = 'STATE'
+    createFileCommandFile(command)
+    core.saveState('my state', 'out val')
+    verifyFileCommand(
+      command,
+      `my state<<${DELIMITER}${os.EOL}out val${os.EOL}${DELIMITER}${os.EOL}`
+    )
+  })
+
+  it('saveState handles boolean inputs', () => {
+    const command = 'STATE'
+    createFileCommandFile(command)
+    core.saveState('my state', true)
+    verifyFileCommand(
+      command,
+      `my state<<${DELIMITER}${os.EOL}true${os.EOL}${DELIMITER}${os.EOL}`
+    )
+  })
+
+  it('saveState handles number inputs', () => {
+    const command = 'STATE'
+    createFileCommandFile(command)
+    core.saveState('my state', 5)
+    verifyFileCommand(
+      command,
+      `my state<<${DELIMITER}${os.EOL}5${os.EOL}${DELIMITER}${os.EOL}`
+    )
+  })
+
+  it('saveState does not allow delimiter as value', () => {
+    const command = 'STATE'
+    createFileCommandFile(command)
+
+    expect(() => {
+      core.saveState('my state', `good stuff ${DELIMITER} bad stuff`)
+    }).toThrow(
+      `Unexpected input: value should not contain the delimiter "${DELIMITER}"`
+    )
+
+    const filePath = path.join(__dirname, `test/${command}`)
+    fs.unlinkSync(filePath)
+  })
+
+  it('saveState does not allow delimiter as name', () => {
+    const command = 'STATE'
+    createFileCommandFile(command)
+
+    expect(() => {
+      core.saveState(`good stuff ${DELIMITER} bad stuff`, 'test')
+    }).toThrow(
+      `Unexpected input: name should not contain the delimiter "${DELIMITER}"`
+    )
+
+    const filePath = path.join(__dirname, `test/${command}`)
+    fs.unlinkSync(filePath)
+  })
+
   it('getState gets wrapper action state', () => {
     expect(core.getState('TEST_1')).toBe('state_val')
   })

packages/core/src/core.ts

@@ -1,10 +1,12 @@
 import {issue, issueCommand} from './command'
-import {issueCommand as issueFileCommand} from './file-command'
+import {
+  issueCommand as issueFileCommand,
+  prepareKeyValueMessage as prepareCommandValue
+} from './file-command'
 import {toCommandProperties, toCommandValue} from './utils'
 
 import * as os from 'os'
 import * as path from 'path'
-import {v4 as uuidv4} from 'uuid'
 
 import {OidcClient} from './oidc-utils'
 
@@ -87,26 +89,10 @@ export function exportVariable(name: string, val: any): void {
 
   const filePath = process.env['GITHUB_ENV'] || ''
   if (filePath) {
-    const delimiter = `ghadelimiter_${uuidv4()}`
-
-    // These should realistically never happen, but just in case someone finds a way to exploit uuid generation let's not allow keys or values that contain the delimiter.
-    if (name.includes(delimiter)) {
-      throw new Error(
-        `Unexpected input: name should not contain the delimiter "${delimiter}"`
-      )
-    }
-
-    if (convertedVal.includes(delimiter)) {
-      throw new Error(
-        `Unexpected input: value should not contain the delimiter "${delimiter}"`
-      )
-    }
-
-    const commandValue = `${name}<<${delimiter}${os.EOL}${convertedVal}${os.EOL}${delimiter}`
-    issueFileCommand('ENV', commandValue)
-  } else {
-    issueCommand('set-env', {name}, convertedVal)
+    return issueFileCommand('ENV', prepareCommandValue(name, val))
   }
+
+  issueCommand('set-env', {name}, convertedVal)
 }
 
 /**
@@ -203,8 +189,13 @@ export function getBooleanInput(name: string, options?: InputOptions): boolean {
  */
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 export function setOutput(name: string, value: any): void {
+  const filePath = process.env['GITHUB_OUTPUT'] || ''
+  if (filePath) {
+    return issueFileCommand('OUTPUT', prepareCommandValue(name, value))
+  }
+
   process.stdout.write(os.EOL)
-  issueCommand('set-output', {name}, value)
+  issueCommand('set-output', {name}, toCommandValue(value))
 }
 
 /**
@@ -358,7 +349,12 @@ export async function group<T>(name: string, fn: () => Promise<T>): Promise<T> {
  */
 // eslint-disable-next-line @typescript-eslint/no-explicit-any
 export function saveState(name: string, value: any): void {
-  issueCommand('save-state', {name}, value)
+  const filePath = process.env['GITHUB_STATE'] || ''
+  if (filePath) {
+    return issueFileCommand('STATE', prepareCommandValue(name, value))
+  }
+
+  issueCommand('save-state', {name}, toCommandValue(value))
 }
 
 /**

packages/core/src/file-command.ts

@@ -5,6 +5,7 @@
 
 import * as fs from 'fs'
 import * as os from 'os'
+import {v4 as uuidv4} from 'uuid'
 import {toCommandValue} from './utils'
 
 export function issueCommand(command: string, message: any): void {
@@ -22,3 +23,25 @@ export function issueCommand(command: string, message: any): void {
     encoding: 'utf8'
   })
 }
+
+export function prepareKeyValueMessage(key: string, value: any): string {
+  const delimiter = `ghadelimiter_${uuidv4()}`
+  const convertedValue = toCommandValue(value)
+
+  // These should realistically never happen, but just in case someone finds a
+  // way to exploit uuid generation let's not allow keys or values that contain
+  // the delimiter.
+  if (key.includes(delimiter)) {
+    throw new Error(
+      `Unexpected input: name should not contain the delimiter "${delimiter}"`
+    )
+  }
+
+  if (convertedValue.includes(delimiter)) {
+    throw new Error(
+      `Unexpected input: value should not contain the delimiter "${delimiter}"`
+    )
+  }
+
+  return `${key}<<${delimiter}${os.EOL}${convertedValue}${os.EOL}${delimiter}`
+}