83 lines
2.3 KiB
TypeScript
83 lines
2.3 KiB
TypeScript
import { appendFileSync, closeSync, openSync, writeFileSync } from 'fs';
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if (process.env.NX_TERMINAL_OUTPUT_PATH) {
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setUpOutputWatching(
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process.env.NX_TERMINAL_CAPTURE_STDERR === 'true',
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process.env.NX_FORWARD_OUTPUT === 'true'
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);
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}
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if (!process.env.NX_WORKSPACE_ROOT) {
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console.error('Invalid Nx command invocation');
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process.exit(1);
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}
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requireCli();
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function requireCli() {
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process.env.NX_CLI_SET = 'true';
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try {
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const cli = require.resolve('@nrwl/tao/index.js', {
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paths: [process.env.NX_WORKSPACE_ROOT],
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});
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require(cli);
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} catch (e) {
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console.error(`Could not find @nrwl/tao module in this workspace.`, e);
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process.exit(1);
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}
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}
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/**
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* We need to collect all stdout and stderr and store it, so the caching mechanism
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* could store it.
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*
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* Writing stdout and stderr into different stream is too risky when using TTY.
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*
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* So we are simply monkey-patching the Javascript object. In this case the actual output will always be correct.
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* And the cached output should be correct unless the CLI bypasses process.stdout or console.log and uses some
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* C-binary to write to stdout.
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*/
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function setUpOutputWatching(captureStderr: boolean, forwardOutput: boolean) {
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const stdoutWrite = process.stdout._write;
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const stderrWrite = process.stderr._write;
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// The terminal output file gets out and err
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const outputPath = process.env.NX_TERMINAL_OUTPUT_PATH;
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const stdoutAndStderrLogFileHandle = openSync(outputPath, 'w');
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const onlyStdout = [] as string[];
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process.stdout._write = (
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chunk: any,
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encoding: string,
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callback: Function
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) => {
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onlyStdout.push(chunk);
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appendFileSync(stdoutAndStderrLogFileHandle, chunk);
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if (forwardOutput) {
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stdoutWrite.apply(process.stdout, [chunk, encoding, callback]);
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} else {
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callback();
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}
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};
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process.stderr._write = (
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chunk: any,
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encoding: string,
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callback: Function
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) => {
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appendFileSync(stdoutAndStderrLogFileHandle, chunk);
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if (forwardOutput) {
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stderrWrite.apply(process.stderr, [chunk, encoding, callback]);
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} else {
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callback();
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}
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};
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process.on('exit', (code) => {
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// when the process exits successfully, and we are not asked to capture stderr
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// override the file with only stdout
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if (code === 0 && !captureStderr) {
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writeFileSync(outputPath, onlyStdout.join(''));
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}
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});
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}
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