Initial commit
This commit is contained in:
Zhongwei Li
317
hooks/session_start_git_context.js
Executable file
317
hooks/session_start_git_context.js
Executable file
@@ -0,0 +1,317 @@
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#!/usr/bin/env node
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/**
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* SessionStart Git Context Injector
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*
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* Injects differential git context at session start:
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* - Commits since last session
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* - Files changed since last session
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* - Current git status
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* - Branch information
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*
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* Token Overhead: ~1-2K tokens (differential only, not full history)
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* Blocking: No
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*/
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const { execSync } = require('child_process');
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const fs = require('fs');
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const path = require('path');
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const yaml = require('yaml');
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/**
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* Load last session metadata
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*/
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function loadLastSession() {
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try {
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const cacheDir = path.join(
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process.env.HOME,
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'.claude',
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'plugins',
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'contextune',
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'.cache'
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);
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const lastSessionFile = path.join(cacheDir, 'last_session.yaml');
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if (!fs.existsSync(lastSessionFile)) {
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return null;
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}
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const content = fs.readFileSync(lastSessionFile, 'utf8');
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return yaml.parse(content);
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} catch (error) {
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console.error('DEBUG: Failed to load last session:', error.message);
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return null;
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}
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}
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/**
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* Get commits since last session
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*/
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function getCommitsSinceLastSession(lastCommit, limit = 10) {
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try {
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const cmd = `git log --oneline ${lastCommit}..HEAD -n ${limit}`;
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const output = execSync(cmd, { encoding: 'utf8', timeout: 2000 });
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const commits = output.trim().split('\n').filter(line => line);
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return commits;
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} catch (error) {
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console.error('DEBUG: Failed to get commits:', error.message);
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return [];
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}
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}
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/**
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* Get files changed since last session
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*/
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function getFilesChanged(lastCommit) {
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try {
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const cmd = `git diff --name-status ${lastCommit}..HEAD`;
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const output = execSync(cmd, { encoding: 'utf8', timeout: 2000 });
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const changes = [];
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for (const line of output.trim().split('\n')) {
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if (!line) continue;
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const parts = line.split('\t');
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if (parts.length >= 2) {
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const status = parts[0];
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const file = parts[1];
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// Decode status
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let changeType = 'modified';
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if (status === 'A') changeType = 'added';
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else if (status === 'D') changeType = 'deleted';
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else if (status === 'M') changeType = 'modified';
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else if (status.startsWith('R')) changeType = 'renamed';
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changes.push({ file, type: changeType, status });
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}
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}
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return changes;
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} catch (error) {
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console.error('DEBUG: Failed to get file changes:', error.message);
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return [];
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}
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}
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/**
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* Get diff statistics
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*/
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function getDiffStats(lastCommit) {
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try {
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const cmd = `git diff --shortstat ${lastCommit}..HEAD`;
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const output = execSync(cmd, { encoding: 'utf8', timeout: 2000 });
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return output.trim();
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} catch (error) {
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return 'Unable to calculate diff stats';
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}
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}
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/**
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* Get current git status
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*/
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function getCurrentStatus() {
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try {
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const cmd = 'git status --short';
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const output = execSync(cmd, { encoding: 'utf8', timeout: 1000 });
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const lines = output.trim().split('\n').filter(line => line);
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if (lines.length === 0) {
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return { clean: true, uncommitted: 0 };
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}
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return { clean: false, uncommitted: lines.length, files: lines.slice(0, 5) };
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} catch (error) {
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return { clean: true, uncommitted: 0 };
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}
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}
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/**
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* Calculate time since last session
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*/
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function getTimeSince(timestamp) {
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try {
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const lastTime = new Date(timestamp);
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const now = new Date();
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const diffMs = now - lastTime;
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const minutes = Math.floor(diffMs / 60000);
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const hours = Math.floor(minutes / 60);
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const days = Math.floor(hours / 24);
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if (days > 0) return `${days} day${days > 1 ? 's' : ''} ago`;
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if (hours > 0) return `${hours} hour${hours > 1 ? 's' : ''} ago`;
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if (minutes > 0) return `${minutes} minute${minutes > 1 ? 's' : ''} ago`;
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return 'just now';
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} catch (error) {
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return 'recently';
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}
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}
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/**
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* Generate context summary
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*/
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function generateContextSummary(lastSession) {
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const commits = getCommitsSinceLastSession(lastSession.last_commit);
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const filesChanged = getFilesChanged(lastSession.last_commit);
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const diffStats = getDiffStats(lastSession.last_commit);
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const currentStatus = getCurrentStatus();
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const timeSince = getTimeSince(lastSession.ended_at);
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// Build summary
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let summary = `📋 Git Context Since Last Session (${timeSince})\n\n`;
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// Commit activity
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if (commits.length > 0) {
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summary += `**Git Activity:**\n`;
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summary += `- ${commits.length} new commit${commits.length > 1 ? 's' : ''}\n`;
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summary += `- ${diffStats}\n`;
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summary += `- Branch: ${lastSession.branch}\n\n`;
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summary += `**Recent Commits:**\n`;
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commits.slice(0, 5).forEach(commit => {
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summary += ` ${commit}\n`;
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});
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if (commits.length > 5) {
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summary += ` ... and ${commits.length - 5} more\n`;
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}
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summary += '\n';
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} else {
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summary += `**Git Activity:** No commits since last session\n\n`;
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}
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// File changes
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if (filesChanged.length > 0) {
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summary += `**Files Changed (${filesChanged.length} total):**\n`;
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const byType = { added: [], modified: [], deleted: [], renamed: [] };
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filesChanged.forEach(change => {
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const list = byType[change.type] || byType.modified;
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list.push(change.file);
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});
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if (byType.added.length > 0) {
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summary += ` Added (${byType.added.length}):\n`;
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byType.added.slice(0, 3).forEach(f => summary += ` - ${f}\n`);
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if (byType.added.length > 3) summary += ` ... and ${byType.added.length - 3} more\n`;
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}
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if (byType.modified.length > 0) {
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summary += ` Modified (${byType.modified.length}):\n`;
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byType.modified.slice(0, 3).forEach(f => summary += ` - ${f}\n`);
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if (byType.modified.length > 3) summary += ` ... and ${byType.modified.length - 3} more\n`;
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}
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if (byType.deleted.length > 0) {
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summary += ` Deleted (${byType.deleted.length}):\n`;
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byType.deleted.slice(0, 3).forEach(f => summary += ` - ${f}\n`);
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}
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summary += '\n';
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}
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// Current working directory status
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if (!currentStatus.clean) {
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summary += `**Current Status:**\n`;
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summary += `- ${currentStatus.uncommitted} uncommitted change${currentStatus.uncommitted > 1 ? 's' : ''}\n`;
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if (currentStatus.files && currentStatus.files.length > 0) {
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summary += `\n**Uncommitted:**\n`;
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currentStatus.files.forEach(file => {
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summary += ` ${file}\n`;
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});
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}
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summary += '\n';
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} else {
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summary += `**Current Status:** Working directory clean ✅\n\n`;
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}
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// Last session context
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if (lastSession.files_worked_on && lastSession.files_worked_on.length > 0) {
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summary += `**Last Session Work:**\n`;
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summary += `- Worked on ${lastSession.file_count} file${lastSession.file_count > 1 ? 's' : ''}\n`;
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if (lastSession.files_worked_on.length <= 5) {
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lastSession.files_worked_on.forEach(f => {
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summary += ` - ${f}\n`;
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});
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} else {
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lastSession.files_worked_on.slice(0, 3).forEach(f => {
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summary += ` - ${f}\n`;
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});
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summary += ` ... and ${lastSession.files_worked_on.length - 3} more\n`;
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}
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summary += '\n';
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}
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summary += `---\n\n`;
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summary += `**Ready to continue!** Git is synced and tracking all changes.\n`;
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return summary;
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}
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/**
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* Main hook entry point
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*/
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function main() {
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try {
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// Read stdin
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const chunks = [];
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process.stdin.on('data', chunk => chunks.push(chunk));
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process.stdin.on('end', () => {
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try {
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const hookData = JSON.parse(Buffer.concat(chunks).toString());
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console.error('DEBUG: SessionStart git context injector triggered');
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// Load last session
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const lastSession = loadLastSession();
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if (!lastSession) {
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console.error('DEBUG: No previous session found, skipping git context');
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// First session or cache cleared
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const response = { continue: true };
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console.log(JSON.stringify(response));
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return;
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}
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console.error(`DEBUG: Last session: ${lastSession.session_id}`);
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console.error(`DEBUG: Last commit: ${lastSession.last_commit}`);
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// Generate context summary
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const summary = generateContextSummary(lastSession);
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console.error(`DEBUG: Generated context summary (${summary.length} chars)`);
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// Inject context
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const response = {
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continue: true,
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additionalContext: summary,
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suppressOutput: false
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};
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console.log(JSON.stringify(response));
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} catch (error) {
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console.error('DEBUG: SessionStart error:', error.message);
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// Never block - always continue
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const response = { continue: true };
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console.log(JSON.stringify(response));
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}
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});
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} catch (error) {
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console.error('DEBUG: SessionStart fatal error:', error.message);
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// Never block
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const response = { continue: true };
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console.log(JSON.stringify(response));
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}
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}
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// Handle stdin
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if (require.main === module) {
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main();
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}
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Reference in New Issue
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