DeterminateSystems/magic-nix-cache-action
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Revamp exit logic

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Luc Perkins 2024-06-03 16:58:47 -07:00
parent 7286978530
commit d4fd993185
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GPG Key ID: 16DB1108FB591835
3 changed files with 53 additions and 94 deletions
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68
dist/index.js generated vendored
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@ -95463,13 +95463,12 @@ async function flakeHubLogin(netrc) {
var ENV_DAEMON_DIR = "MAGIC_NIX_CACHE_DAEMONDIR";
var FACT_ENV_VARS_PRESENT = "required_env_vars_present";
var FACT_DIFF_STORE_ENABLED = "diff_store";
var FACT_NOOP_MODE = "noop_mode";
var STATE_ERROR_IN_MAIN = "ERROR_IN_MAIN";
var STATE_DAEMONDIR = "MAGIC_NIX_CACHE_DAEMONDIR";
var STATE_ERROR_IN_MAIN = "ERROR_IN_MAIN";
var STATE_STARTED = "MAGIC_NIX_CACHE_STARTED";
var STARTED_HINT = "true";
var TEXT_NOOP = "Magic Nix Cache is already running, this workflow job is in noop mode. Is the Magic Nix Cache in the workflow twice?";
@ -95534,8 +95533,11 @@ var MagicNixCacheAction = class extends DetSysAction {
await this.notifyAutoCache();
}
async post() {
if (!this.strictMode && this.mainError !== void 0) {
this.exitWithWarning(this.mainError);
if (!this.strictMode && this.errorInMain) {
core.warning(
`skipping post phase due to error in main phase: ${this.errorInMain}`
);
process.exit(0);
}
if (this.noopMode) {
core.debug(TEXT_NOOP);
@ -95654,17 +95656,11 @@ var MagicNixCacheAction = class extends DetSysAction {
const pidFile = external_node_path_namespaceObject.join(this.daemonDir, "daemon.pid");
await promises_namespaceObject.writeFile(pidFile, `${daemon.pid}`);
core.info("Waiting for magic-nix-cache to start...");
await new Promise((resolve, reject) => {
await new Promise((resolve, _reject) => {
notifyPromise.then((_value) => {
resolve();
}).catch((e) => {
const msg = stringifyError(e);
if (this.strictMode) {
reject(new Error(`error in notifyPromise: ${msg}`));
} else {
this.setMainError(msg);
this.exitWithWarning(`failed to start daemon: ${msg}`);
}
this.exitMain(`Error in notifyPromise: ${stringifyError(e)}`);
});
daemon.on("exit", async (code, signal) => {
let msg;
@ -95675,12 +95671,7 @@ var MagicNixCacheAction = class extends DetSysAction {
} else {
msg = "Daemon unexpectedly exited";
}
if (this.strictMode) {
reject(new Error(msg));
} else {
this.setMainError(msg);
this.exitWithWarning(`Failed to kill daemon: ${msg}`);
}
this.exitMain(msg);
});
});
daemon.unref();
@ -95707,18 +95698,7 @@ var MagicNixCacheAction = class extends DetSysAction {
}
core.debug(`back from post: ${res.body}`);
} catch (e) {
if (this.strictMode) {
core.setFailed(`Magic Nix Cache failed to start: ${(0,external_node_util_.inspect)(e)}`);
} else {
core.warning(`Error marking the workflow as started:`);
core.warning((0,external_node_util_.inspect)(e));
core.warning(
`Magic Nix Cache may not be running for this workflow.`
);
this.setMainError(
`Error starting the Magic Nix Cache: ${stringifyError(e)}`
);
}
this.exitMain(`Error starting the Magic Nix Cache: ${stringifyError(e)}`);
}
}
async tearDownAutoCache() {
@ -95750,15 +95730,13 @@ var MagicNixCacheAction = class extends DetSysAction {
core.debug(`unwatching the daemon log`);
log.unwatch();
}
core.debug(`killing`);
core.debug(`killing daemon process ${pid}`);
try {
process.kill(pid, "SIGTERM");
} catch (e) {
if (typeof e === "object" && e && "code" in e && e.code !== "ESRCH") {
if (this.strictMode) {
throw e;
} else {
this.exitWithWarning(`couldn't kill daemon: ${stringifyError(e)}`);
}
}
} finally {
@ -95769,19 +95747,19 @@ var MagicNixCacheAction = class extends DetSysAction {
}
}
}
exitWithWarning(msg) {
core.warning(msg);
core.warning(`strict mode not enabled; exiting`);
process.exit(0);
// Exit the workflow during the main phase. If strict mode is set, fail; if not, save the error
// message to the workflow's state and exit successfully.
exitMain(msg) {
if (this.strictMode) {
core.setFailed(msg);
} else {
core.saveState(STATE_ERROR_IN_MAIN, msg);
process.exit(0);
}
}
// If the main phase errors, save the state for use in post.
// This matters only when strict mode is NOT set.
setMainError(msg) {
core.saveState(STATE_ERROR_IN_MAIN, msg);
}
// In the post phase, if the main phase errored, return `true` so that the
// phase can be skipped (with a warning).
get mainError() {
// If the main phase threw an error (not in strict mode), this will be a non-empty
// string available in the post phase.
get errorInMain() {
const state = core.getState(STATE_ERROR_IN_MAIN);
return state !== "" ? state : void 0;
}

2
dist/index.js.map generated vendored
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File diff suppressed because one or more lines are too long

77
src/index.ts
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@ -7,7 +7,6 @@ import { SpawnOptions, spawn } from "node:child_process";
import { mkdirSync, openSync, readFileSync } from "node:fs";
import * as fs from "node:fs/promises";
import * as path from "node:path";
import { inspect } from "node:util";
// The ENV_DAEMON_DIR is intended to determine if we "own" the daemon or not,
// in the case that a user has put the magic nix cache into their workflow
@ -18,8 +17,8 @@ const FACT_ENV_VARS_PRESENT = "required_env_vars_present";
const FACT_DIFF_STORE_ENABLED = "diff_store";
const FACT_NOOP_MODE = "noop_mode";
const STATE_ERROR_IN_MAIN = "ERROR_IN_MAIN";
const STATE_DAEMONDIR = "MAGIC_NIX_CACHE_DAEMONDIR";
const STATE_ERROR_IN_MAIN = "ERROR_IN_MAIN";
const STATE_STARTED = "MAGIC_NIX_CACHE_STARTED";
const STARTED_HINT = "true";
@ -34,10 +33,13 @@ class MagicNixCacheAction extends DetSysAction {
private hostAndPort: string;
private diffStore: boolean;
private httpClient: Got;
private noopMode: boolean;
private daemonDir: string;
private daemonStarted: boolean;
// No-op mode is set to `true` if the MNC is already running, in which case
// the workflow will use the existing process rather than starting a new one.
private noopMode: boolean;
constructor() {
super({
name: "magic-nix-cache",
@ -109,8 +111,11 @@ class MagicNixCacheAction extends DetSysAction {
async post(): Promise<void> {
// If strict mode is off and there was an error in main, such as the daemon not starting,
// then the post phase is skipped with a warning.
if (!this.strictMode && this.mainError !== undefined) {
this.exitWithWarning(this.mainError);
if (!this.strictMode && this.errorInMain) {
actionsCore.warning(
`skipping post phase due to error in main phase: ${this.errorInMain}`,
);
process.exit(0);
}
if (this.noopMode) {
@ -259,7 +264,7 @@ class MagicNixCacheAction extends DetSysAction {
actionsCore.info("Waiting for magic-nix-cache to start...");
await new Promise<void>((resolve, reject) => {
await new Promise<void>((resolve, _reject) => {
notifyPromise
// eslint-disable-next-line github/no-then
.then((_value) => {
@ -267,14 +272,7 @@ class MagicNixCacheAction extends DetSysAction {
})
// eslint-disable-next-line github/no-then
.catch((e: unknown) => {
const msg = stringifyError(e);
if (this.strictMode) {
reject(new Error(`error in notifyPromise: ${msg}`));
} else {
this.setMainError(msg);
this.exitWithWarning(`failed to start daemon: ${msg}`);
}
this.exitMain(`Error in notifyPromise: ${stringifyError(e)}`);
});
daemon.on("exit", async (code, signal) => {
@ -287,12 +285,7 @@ class MagicNixCacheAction extends DetSysAction {
msg = "Daemon unexpectedly exited";
}
if (this.strictMode) {
reject(new Error(msg));
} else {
this.setMainError(msg);
this.exitWithWarning(`Failed to kill daemon: ${msg}`);
}
this.exitMain(msg);
});
});
@ -327,18 +320,7 @@ class MagicNixCacheAction extends DetSysAction {
actionsCore.debug(`back from post: ${res.body}`);
} catch (e: unknown) {
if (this.strictMode) {
actionsCore.setFailed(`Magic Nix Cache failed to start: ${inspect(e)}`);
} else {
actionsCore.warning(`Error marking the workflow as started:`);
actionsCore.warning(inspect(e));
actionsCore.warning(
`Magic Nix Cache may not be running for this workflow.`,
);
this.setMainError(
`Error starting the Magic Nix Cache: ${stringifyError(e)}`,
);
}
this.exitMain(`Error starting the Magic Nix Cache: ${stringifyError(e)}`);
}
}
@ -377,16 +359,16 @@ class MagicNixCacheAction extends DetSysAction {
log.unwatch();
}
actionsCore.debug(`killing`);
actionsCore.debug(`killing daemon process ${pid}`);
try {
process.kill(pid, "SIGTERM");
} catch (e: unknown) {
if (typeof e === "object" && e && "code" in e && e.code !== "ESRCH") {
// Throw an error only in strict mode, otherwise ignore because
// we're in the post phase and shutting down after this anyway
if (this.strictMode) {
throw e;
} else {
this.exitWithWarning(`couldn't kill daemon: ${stringifyError(e)}`);
}
}
} finally {
@ -398,21 +380,20 @@ class MagicNixCacheAction extends DetSysAction {
}
}
private exitWithWarning(msg: string): void {
actionsCore.warning(msg);
actionsCore.warning(`strict mode not enabled; exiting`);
process.exit(0);
// Exit the workflow during the main phase. If strict mode is set, fail; if not, save the error
// message to the workflow's state and exit successfully.
private exitMain(msg: string): void {
if (this.strictMode) {
actionsCore.setFailed(msg);
} else {
actionsCore.saveState(STATE_ERROR_IN_MAIN, msg);
process.exit(0);
}
}
// If the main phase errors, save the state for use in post.
// This matters only when strict mode is NOT set.
private setMainError(msg: string): void {
actionsCore.saveState(STATE_ERROR_IN_MAIN, msg);
}
// In the post phase, if the main phase errored, return `true` so that the
// phase can be skipped (with a warning).
private get mainError(): string | undefined {
// If the main phase threw an error (not in strict mode), this will be a non-empty
// string available in the post phase.
private get errorInMain(): string | undefined {
const state = actionsCore.getState(STATE_ERROR_IN_MAIN);
return state !== "" ? state : undefined;
}