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feat(typescript): worker mode for ts_project (#2136)
* feat(typescript): worker mode for ts_project * chore: cleanup and declare protobufjs dependency * fix: do not pass --watch for non-worker mode * fix: do not test worker on windows * fix: log on standalone failures * chore: docs improvements Co-authored-by: Alex Eagle <[email protected]> Co-authored-by: Dan Muller <[email protected]>
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Nov 10, 2020
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,6 +1,15 @@ | ||
| { | ||
| "compilerOptions": { | ||
| "jsx": "react", | ||
| "lib": ["ES2015", "DOM"] | ||
| } | ||
| } | ||
| "lib": [ | ||
| "ES2015", | ||
| "DOM" | ||
| ] | ||
| }, | ||
| // When using ts_project in worker mode, we run outside the Bazel sandbox (unless using --worker_sandboxing). | ||
| // We list the files that should be part of this particular compilation to avoid TypeScript discovering others. | ||
| "include": [ | ||
| "*.tsx", | ||
| "*.ts" | ||
| ] | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,55 @@ | ||
| # BEGIN-INTERNAL | ||
|
|
||
| load("//internal/common:copy_to_bin.bzl", "copy_to_bin") | ||
| load("//third_party/github.com/bazelbuild/bazel-skylib:rules/copy_file.bzl", "copy_file") | ||
|
|
||
| # Copy the proto file to a matching third_party/... nested directory | ||
| # so the runtime require() statements still work | ||
| _worker_proto_dir = "third_party/github.com/bazelbuild/bazel/src/main/protobuf" | ||
|
|
||
| genrule( | ||
| name = "copy_worker_js", | ||
| srcs = ["//packages/worker:npm_package"], | ||
| outs = ["worker.js"], | ||
| cmd = "cp $(execpath //packages/worker:npm_package)/index.js $@", | ||
| visibility = ["//visibility:public"], | ||
| ) | ||
|
|
||
| copy_file( | ||
| name = "copy_worker_proto", | ||
| src = "@build_bazel_rules_typescript//%s:worker_protocol.proto" % _worker_proto_dir, | ||
| out = "%s/worker_protocol.proto" % _worker_proto_dir, | ||
| visibility = ["//visibility:public"], | ||
| ) | ||
|
|
||
| copy_to_bin( | ||
| name = "worker_adapter", | ||
| srcs = [ | ||
| "worker_adapter.js", | ||
| ], | ||
| visibility = ["//visibility:public"], | ||
| ) | ||
|
|
||
| filegroup( | ||
| name = "package_contents", | ||
| srcs = [ | ||
| "BUILD.bazel", | ||
| ], | ||
| visibility = ["//packages/typescript:__subpackages__"], | ||
| ) | ||
|
|
||
| # END-INTERNAL | ||
|
|
||
| exports_files([ | ||
| "worker_adapter.js", | ||
| ]) | ||
|
|
||
| filegroup( | ||
| name = "worker", | ||
| srcs = [ | ||
| "third_party/github.com/bazelbuild/bazel/src/main/protobuf/worker_protocol.proto", | ||
| "worker.js", | ||
| "worker_adapter.js", | ||
| ], | ||
| visibility = ["//visibility:public"], | ||
| ) |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,99 @@ | ||
| /** | ||
| * @fileoverview wrapper program around the TypeScript compiler, tsc | ||
| * | ||
| * It intercepts the Bazel Persistent Worker protocol, using it to remote-control tsc running as a | ||
| * child process. In between builds, the tsc process is stopped (akin to ctrl-z in a shell) and then | ||
| * resumed (akin to `fg`) when the inputs have changed. | ||
| * | ||
| * See https://medium.com/@mmorearty/how-to-create-a-persistent-worker-for-bazel-7738bba2cabb | ||
| * for more background (note, that is documenting a different implementation) | ||
| */ | ||
| const child_process = require('child_process'); | ||
| const MNEMONIC = 'TsProject'; | ||
| const worker = require('./worker'); | ||
|
|
||
| const workerArg = process.argv.indexOf('--persistent_worker') | ||
| if (workerArg > 0) { | ||
| process.argv.splice(workerArg, 1, '--watch') | ||
|
|
||
| if (process.platform !== 'linux' && process.platform !== 'darwin') { | ||
| throw new Error(`Worker mode is only supported on linux and darwin, not ${process.platform}. | ||
| See https://github.com/bazelbuild/rules_nodejs/issues/2277`); | ||
| } | ||
| } | ||
|
|
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| const [tscBin, ...tscArgs] = process.argv.slice(2); | ||
|
|
||
| const child = child_process.spawn( | ||
| tscBin, | ||
| tscArgs, | ||
| {stdio: 'pipe'}, | ||
| ); | ||
| function awaitOneBuild() { | ||
| child.kill('SIGCONT') | ||
|
|
||
| let buffer = []; | ||
| return new Promise((res) => { | ||
| function awaitBuild(s) { | ||
| buffer.push(s); | ||
|
|
||
| if (s.includes('Watching for file changes.')) { | ||
| child.kill('SIGSTOP') | ||
|
|
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| const success = s.includes('Found 0 errors.'); | ||
| res(success); | ||
|
|
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| child.stdout.removeListener('data', awaitBuild); | ||
|
|
||
| if (!success) { | ||
| console.error( | ||
| `\nError output from tsc worker:\n\n ${ | ||
| buffer.slice(1).map(s => s.toString()).join('').replace(/\n/g, '\n ')}`, | ||
| ) | ||
| } | ||
|
|
||
| buffer = []; | ||
| } | ||
| }; | ||
| child.stdout.on('data', awaitBuild); | ||
| }); | ||
| } | ||
|
|
||
| async function main() { | ||
| // Bazel will pass a special argument to the program when it's running us as a worker | ||
| if (workerArg > 0) { | ||
| worker.log(`Running ${MNEMONIC} as a Bazel worker`); | ||
|
|
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| worker.runWorkerLoop(awaitOneBuild); | ||
| } else { | ||
| // Running standalone so stdout is available as usual | ||
| console.log(`Running ${MNEMONIC} as a standalone process`); | ||
| console.error( | ||
| `Started a new process to perform this action. Your build might be misconfigured, try | ||
| --strategy=${MNEMONIC}=worker`); | ||
|
|
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| const stdoutbuffer = []; | ||
| child.stdout.on('data', data => stdoutbuffer.push(data)); | ||
|
|
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| const stderrbuffer = []; | ||
| child.stderr.on('data', data => stderrbuffer.push(data)); | ||
|
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| child.on('exit', code => { | ||
| if (code !== 0) { | ||
| console.error( | ||
| `\nstdout from tsc:\n\n ${ | ||
| stdoutbuffer.map(s => s.toString()).join('').replace(/\n/g, '\n ')}`, | ||
| ) | ||
| console.error( | ||
| `\nstderr from tsc:\n\n ${ | ||
| stderrbuffer.map(s => s.toString()).join('').replace(/\n/g, '\n ')}`, | ||
| ) | ||
| } | ||
| process.exit(code) | ||
| }); | ||
| } | ||
| } | ||
|
|
||
| if (require.main === module) { | ||
| main(); | ||
| } |
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