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* Lifecycle Executor - Setup/Execute/Teardown job phases
*
* Manages the full lifecycle of a job execution:
* 1. Setup steps run sequentially
* 2. Main build command executes
* 3. Teardown steps ALWAYS run (even on failure)
*/
import { spawn, ChildProcess } from 'child_process';
import { RecipeLifecycleStep } from './recipes/types.js';
// ---------------------------------------------------------------------------
// Result types
// ---------------------------------------------------------------------------
export interface LifecyclePhaseResult {
phase: 'setup' | 'execute' | 'teardown';
stepName: string;
exitCode: number;
stdout: string;
stderr: string;
durationMs: number;
skipped: boolean;
error?: string;
}
export interface LifecycleResult {
setupResults: LifecyclePhaseResult[];
executeResult: LifecyclePhaseResult;
teardownResults: LifecyclePhaseResult[];
overallSuccess: boolean;
totalDurationMs: number;
}
export interface LifecycleOptions {
workDir: string;
environment?: Record<string, string>;
onProgress?: (phase: string, step: string, progress: number) => void;
onLog?: (phase: string, step: string, log: string) => void;
abortSignal?: AbortSignal;
}
// ---------------------------------------------------------------------------
// Constants
// ---------------------------------------------------------------------------
const DEFAULT_STEP_TIMEOUT_S = 300;
const SIGKILL_GRACE_MS = 5000;
// ---------------------------------------------------------------------------
// LifecycleExecutor
// ---------------------------------------------------------------------------
export class LifecycleExecutor {
/**
* Execute full lifecycle: setup -> main command -> teardown
*
* CRITICAL BEHAVIORS:
* 1. Setup steps run sequentially. If a step fails and continueOnError=false,
* skip remaining setup + main command, but STILL run teardown.
* 2. Main command runs only if all required setup steps succeed.
* 3. Teardown ALWAYS runs, even if setup or main command failed.
* 4. Each step has its own timeout (default 300s).
* 5. If abortSignal fires, terminate current step and run teardown.
*/
async execute(
setupSteps: RecipeLifecycleStep[],
mainCommand: string,
teardownSteps: RecipeLifecycleStep[],
options: LifecycleOptions
): Promise<LifecycleResult> {
const totalStart = Date.now();
const setupResults: LifecyclePhaseResult[] = [];
let executeResult: LifecyclePhaseResult;
const teardownResults: LifecyclePhaseResult[] = [];
let setupFailed = false;
let aborted = this.isAborted(options);
// ---- SETUP PHASE (0-30%) ----
const setupCount = setupSteps.length;
for (let i = 0; i < setupCount; i++) {
const step = setupSteps[i];
const progressBase = (i / Math.max(setupCount, 1)) * 30;
if (aborted || setupFailed) {
setupResults.push(this.skippedResult('setup', step.name));
continue;
}
options.onProgress?.('setup', step.name, Math.round(progressBase));
const result = await this.executeStep(step, 'setup', options);
setupResults.push(result);
if (result.exitCode !== 0 && !step.continueOnError) {
setupFailed = true;
}
aborted = this.isAborted(options);
}
options.onProgress?.('setup', 'complete', 30);
// ---- EXECUTE PHASE (30-90%) ----
if (setupFailed || aborted) {
executeResult = this.skippedResult('execute', mainCommand);
} else {
options.onProgress?.('execute', mainCommand, 30);
const mainStep: RecipeLifecycleStep = {
name: mainCommand,
command: mainCommand,
timeout: DEFAULT_STEP_TIMEOUT_S,
continueOnError: false,
};
executeResult = await this.executeStep(mainStep, 'execute', options);
options.onProgress?.('execute', mainCommand, 90);
}
aborted = this.isAborted(options);
// ---- TEARDOWN PHASE (90-100%) ----
// Teardown ALWAYS runs fully — strip abortSignal so it cannot be cancelled.
const teardownOptions: LifecycleOptions = { ...options, abortSignal: undefined };
const teardownCount = teardownSteps.length;
for (let i = 0; i < teardownCount; i++) {
const step = teardownSteps[i];
const progressBase = 90 + ((i / Math.max(teardownCount, 1)) * 10);
teardownOptions.onProgress?.('teardown', step.name, Math.round(progressBase));
const result = await this.executeStep(step, 'teardown', teardownOptions);
teardownResults.push(result);
}
options.onProgress?.('teardown', 'complete', 100);
const totalDurationMs = Date.now() - totalStart;
const overallSuccess =
!setupFailed &&
executeResult.exitCode === 0 &&
!executeResult.skipped;
return {
setupResults,
executeResult,
teardownResults,
overallSuccess,
totalDurationMs,
};
}
/**
* Execute a single lifecycle step using child_process.spawn.
*/
private executeStep(
step: RecipeLifecycleStep,
phase: string,
options: LifecycleOptions
): Promise<LifecyclePhaseResult> {
return new Promise<LifecyclePhaseResult>((resolve) => {
const start = Date.now();
const timeoutMs = (step.timeout ?? DEFAULT_STEP_TIMEOUT_S) * 1000;
let stdout = '';
let stderr = '';
let settled = false;
let proc: ChildProcess;
const finish = (exitCode: number, error?: string) => {
if (settled) return;
settled = true;
clearTimeout(timer);
removeAbortListener();
resolve({
phase: phase as 'setup' | 'execute' | 'teardown',
stepName: step.name,
exitCode,
stdout,
stderr,
durationMs: Date.now() - start,
skipped: false,
error,
});
};
const killProc = (reason: string) => {
if (settled) return;
try {
proc.kill('SIGTERM');
} catch { /* already dead */ }
setTimeout(() => {
if (!settled) {
try {
proc.kill('SIGKILL');
} catch { /* already dead */ }
}
}, SIGKILL_GRACE_MS);
// Don't finish here; let the 'close' event handle it.
// But set error so close handler knows what happened.
stderr += `\n[lifecycle] ${reason}`;
};
// Timeout handler
const timer = setTimeout(() => {
killProc(`Step timed out after ${step.timeout ?? DEFAULT_STEP_TIMEOUT_S}s`);
// If process doesn't close in grace period + 1s, force-resolve
setTimeout(() => {
finish(124, `Step timed out after ${step.timeout ?? DEFAULT_STEP_TIMEOUT_S}s`);
}, SIGKILL_GRACE_MS + 1000);
}, timeoutMs);
// Abort signal handler
const onAbort = () => {
killProc('Aborted by signal');
setTimeout(() => {
finish(130, 'Aborted by signal');
}, SIGKILL_GRACE_MS + 1000);
};
let removeAbortListener = () => {};
if (options.abortSignal) {
if (options.abortSignal.aborted) {
settled = true;
resolve({
phase: phase as 'setup' | 'execute' | 'teardown',
stepName: step.name,
exitCode: 130,
stdout: '',
stderr: '',
durationMs: 0,
skipped: false,
error: 'Aborted by signal',
});
return;
}
options.abortSignal.addEventListener('abort', onAbort, { once: true });
removeAbortListener = () => {
options.abortSignal?.removeEventListener('abort', onAbort);
};
}
// Merge environment
const env: NodeJS.ProcessEnv = {
...process.env,
...(options.environment ?? {}),
};
try {
proc = spawn('sh', ['-c', step.command], {
cwd: options.workDir,
env,
stdio: ['ignore', 'pipe', 'pipe'],
});
} catch (err) {
finish(1, err instanceof Error ? err.message : String(err));
return;
}
proc.stdout?.on('data', (data: Buffer) => {
const text = data.toString();
stdout += text;
options.onLog?.(phase, step.name, text);
});
proc.stderr?.on('data', (data: Buffer) => {
const text = data.toString();
stderr += text;
options.onLog?.(phase, step.name, text);
});
proc.on('close', (code: number | null) => {
finish(code ?? 1);
});
proc.on('error', (err: Error) => {
finish(1, err.message);
});
});
}
// ---------------------------------------------------------------------------
// Helpers
// ---------------------------------------------------------------------------
private skippedResult(
phase: 'setup' | 'execute' | 'teardown',
stepName: string
): LifecyclePhaseResult {
return {
phase,
stepName,
exitCode: -1,
stdout: '',
stderr: '',
durationMs: 0,
skipped: true,
};
}
private isAborted(options: LifecycleOptions): boolean {
return options.abortSignal?.aborted ?? false;
}
}
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