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59 lines
1.8 KiB
JavaScript
59 lines
1.8 KiB
JavaScript
import * as fs from 'node:fs'
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import * as os from 'node:os'
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import * as crypto from 'node:crypto'
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/** Based on https://github.com/actions/toolkit/blob/4e3b068ce116d28cb840033c02f912100b4592b0/packages/core/src/file-command.ts */
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export function setOutput(key, value) {
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const filePath = process.env['GITHUB_OUTPUT'] || ''
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if (filePath) {
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return issueFileCommand('OUTPUT', prepareKeyValueMessage(key, value))
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}
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process.stdout.write(os.EOL)
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}
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function issueFileCommand(command, message) {
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const filePath = process.env[`GITHUB_${command}`]
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if (!filePath) {
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throw new Error(
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`Unable to find environment variable for file command ${command}`
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)
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}
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if (!fs.existsSync(filePath)) {
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throw new Error(`Missing file at path: ${filePath}`)
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}
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fs.appendFileSync(filePath, `${toCommandValue(message)}${os.EOL}`, {
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encoding: 'utf8'
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})
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}
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function prepareKeyValueMessage(key, value) {
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const delimiter = `gh-delimiter-${crypto.randomUUID()}`
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const convertedValue = toCommandValue(value)
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// These should realistically never happen, but just in case someone finds a
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// way to exploit uuid generation let's not allow keys or values that contain
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// the delimiter.
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if (key.includes(delimiter)) {
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throw new Error(
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`Unexpected input: name should not contain the delimiter "${delimiter}"`
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)
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}
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if (convertedValue.includes(delimiter)) {
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throw new Error(
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`Unexpected input: value should not contain the delimiter "${delimiter}"`
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)
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}
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return `${key}<<${delimiter}${os.EOL}${convertedValue}${os.EOL}${delimiter}`
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}
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function toCommandValue(input) {
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if (input === null || input === undefined) {
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return ''
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} else if (typeof input === 'string' || input instanceof String) {
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return input
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}
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return JSON.stringify(input)
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}
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