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build[patch]: Add way to escape side effects within an entrypoint #6174

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merged 5 commits into from
Jul 23, 2024
Merged

build[patch]: Add way to escape side effects within an entrypoint #6174

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cc89918
Add way to escape side effects within an entrypoint
jacoblee93 Jul 23, 2024
022a541
Fix format
jacoblee93 Jul 23, 2024
3290bec
Add to all old versions
jacoblee93 Jul 23, 2024
7a8fd7c
Fix comment
jacoblee93 Jul 23, 2024
6eb16e5
Remove hard error
jacoblee93 Jul 23, 2024
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25 changes: 17 additions & 8 deletions libs/langchain-scripts/src/build_v2.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -441,16 +441,16 @@ async function checkTreeShaking(config: LangChainConfig) {
);
const externals = listExternals(packageJson, config?.internals ?? []);
const entrypoints = listEntrypoints(packageJson);
const consoleLog = console.log;
/** @type {Map<string, { log: string; hasSideEffects: boolean; }>} */
const consoleInfo = console.info;
/** @type {Map<string, { log: string; hasUnexpectedSideEffects: boolean; }>} */
const reportMap = new Map();
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for (const entrypoint of entrypoints) {
let sideEffects = "";

console.log = function (...args) {
console.info = function (...args) {
const line = args.length ? args.join(" ") : "";
if (line.trim().startsWith("First side effect in")) {
if (line.includes("First side effect in")) {
sideEffects += `${line}\n`;
}
};
Expand All @@ -461,17 +461,26 @@ async function checkTreeShaking(config: LangChainConfig) {
experimentalLogSideEffects: true,
});

let hasUnexpectedSideEffects = sideEffects.length > 0;
if (hasUnexpectedSideEffects) {
const entrypointContent = fs.readFileSync(entrypoint);
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// Allow escaping side effects strictly within code directly
// within an entrypoints
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hasUnexpectedSideEffects = !entrypointContent
.toString()
.includes("/* __LC_ALLOW_ENTRYPOINT_SIDE_EFFECTS__ */");
}
reportMap.set(entrypoint, {
log: sideEffects,
hasSideEffects: sideEffects.length > 0,
hasUnexpectedSideEffects,
});
}

console.log = consoleLog;
console.info = consoleInfo;

let failed = false;
for (const [entrypoint, report] of reportMap) {
if (report.hasSideEffects) {
if (report.hasUnexpectedSideEffects) {
failed = true;
console.log("---------------------------------");
console.log(`Tree shaking failed for ${entrypoint}`);
Expand All @@ -480,7 +489,7 @@ async function checkTreeShaking(config: LangChainConfig) {
}

if (failed) {
process.exit(1);
throw new Error("Tree shaking checks failed.");
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} else {
console.log("Tree shaking checks passed!");
}
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