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| 1 | +import { execSync } from 'child_process'; |
| 2 | +import { readFileSync, writeFileSync, chmodSync, existsSync, unlinkSync, mkdirSync } from 'fs'; |
| 3 | +import path from 'path'; |
| 4 | + |
| 5 | +const HOOK_MARKER = '# codeant-push-protection'; |
| 6 | + |
| 7 | +/** |
| 8 | + * Build the full pre-push hook script (with shebang). |
| 9 | + * @param {string} failOn - Severity threshold (e.g. "HIGH", "CRITICAL") |
| 10 | + */ |
| 11 | +function buildHookScript(failOn = 'HIGH') { |
| 12 | + return `#!/bin/sh |
| 13 | +${buildHookBlock(failOn)} |
| 14 | +`; |
| 15 | +} |
| 16 | + |
| 17 | +/** |
| 18 | + * Build just the CodeAnt block (no shebang), used when appending to an existing hook. |
| 19 | + * @param {string} failOn - Severity threshold |
| 20 | + */ |
| 21 | +function buildHookBlock(failOn = 'HIGH') { |
| 22 | + return `${HOOK_MARKER} |
| 23 | +# Auto-installed by CodeAnt AI — blocks pushes containing secrets. |
| 24 | +# To disable: delete this hook or run "codeant push-protection disable" |
| 25 | +command -v codeant >/dev/null 2>&1 || exit 0 |
| 26 | +codeant secrets --committed --fail-on ${failOn} |
| 27 | +${HOOK_MARKER_END}`; |
| 28 | +} |
| 29 | + |
| 30 | +const HOOK_MARKER_END = '# end-codeant-push-protection'; |
| 31 | + |
| 32 | +/** |
| 33 | + * Replace the CodeAnt block in a hook file with new content (or remove it). |
| 34 | + */ |
| 35 | +function replaceCodeAntBlock(fileContent, newBlock) { |
| 36 | + const startIdx = fileContent.indexOf(HOOK_MARKER); |
| 37 | + let endIdx = fileContent.indexOf(HOOK_MARKER_END); |
| 38 | + if (startIdx === -1) return fileContent; |
| 39 | + if (endIdx === -1) { |
| 40 | + // Legacy hook without end marker — remove from start marker to EOF |
| 41 | + endIdx = fileContent.length; |
| 42 | + } else { |
| 43 | + endIdx += HOOK_MARKER_END.length; |
| 44 | + } |
| 45 | + const before = fileContent.slice(0, startIdx); |
| 46 | + const after = fileContent.slice(endIdx); |
| 47 | + return (before + newBlock + after).replace(/\n{3,}/g, '\n\n'); |
| 48 | +} |
| 49 | + |
| 50 | +/** |
| 51 | + * Find the git root directory for a given workspace path. |
| 52 | + */ |
| 53 | +function findGitRoot(workspacePath) { |
| 54 | + try { |
| 55 | + return execSync('git rev-parse --show-toplevel', { |
| 56 | + cwd: workspacePath, |
| 57 | + encoding: 'utf-8', |
| 58 | + timeout: 5000, |
| 59 | + stdio: ['pipe', 'pipe', 'pipe'], |
| 60 | + }).trim(); |
| 61 | + } catch { |
| 62 | + return null; |
| 63 | + } |
| 64 | +} |
| 65 | + |
| 66 | +/** |
| 67 | + * Get the effective hooks directory (respects core.hooksPath). |
| 68 | + */ |
| 69 | +function getHooksDir(gitRoot) { |
| 70 | + try { |
| 71 | + const custom = execSync('git config --get core.hooksPath', { |
| 72 | + cwd: gitRoot, |
| 73 | + encoding: 'utf-8', |
| 74 | + timeout: 5000, |
| 75 | + stdio: ['pipe', 'pipe', 'pipe'], |
| 76 | + }).trim(); |
| 77 | + if (custom) return path.resolve(gitRoot, custom); |
| 78 | + } catch { |
| 79 | + // No custom hooksPath — use default |
| 80 | + } |
| 81 | + return path.join(gitRoot, '.git', 'hooks'); |
| 82 | +} |
| 83 | + |
| 84 | +/** |
| 85 | + * Install a pre-push hook that runs secret scanning before push. |
| 86 | + * |
| 87 | + * @param {string} workspacePath - Path to the git repository |
| 88 | + * @param {object} [options] |
| 89 | + * @param {string} [options.failOn="HIGH"] - Severity threshold |
| 90 | + * @returns {{ installed: boolean, hookPath: string|null, message: string }} |
| 91 | + */ |
| 92 | +export function installPushProtectionHook(workspacePath, options = {}) { |
| 93 | + const { failOn = 'HIGH' } = options; |
| 94 | + |
| 95 | + const gitRoot = findGitRoot(workspacePath); |
| 96 | + if (!gitRoot) { |
| 97 | + return { installed: false, hookPath: null, message: 'Not a git repository' }; |
| 98 | + } |
| 99 | + |
| 100 | + const hooksDir = getHooksDir(gitRoot); |
| 101 | + if (!existsSync(hooksDir)) { |
| 102 | + mkdirSync(hooksDir, { recursive: true }); |
| 103 | + } |
| 104 | + const hookPath = path.join(hooksDir, 'pre-push'); |
| 105 | + |
| 106 | + // If hook already exists, check if it's ours |
| 107 | + if (existsSync(hookPath)) { |
| 108 | + const existing = readFileSync(hookPath, 'utf-8'); |
| 109 | + if (existing.includes(HOOK_MARKER)) { |
| 110 | + // Replace only our block, preserve everything else |
| 111 | + const updated = replaceCodeAntBlock(existing, buildHookBlock(failOn)); |
| 112 | + writeFileSync(hookPath, updated, 'utf-8'); |
| 113 | + chmodSync(hookPath, 0o755); |
| 114 | + return { installed: true, hookPath, message: 'Hook updated' }; |
| 115 | + } |
| 116 | + // There's a user-managed hook — append our block (no duplicate shebang) |
| 117 | + const appended = existing.trimEnd() + '\n\n' + buildHookBlock(failOn) + '\n'; |
| 118 | + writeFileSync(hookPath, appended, 'utf-8'); |
| 119 | + chmodSync(hookPath, 0o755); |
| 120 | + return { installed: true, hookPath, message: 'Hook appended to existing pre-push' }; |
| 121 | + } |
| 122 | + |
| 123 | + writeFileSync(hookPath, buildHookScript(failOn), 'utf-8'); |
| 124 | + chmodSync(hookPath, 0o755); |
| 125 | + return { installed: true, hookPath, message: 'Hook installed' }; |
| 126 | +} |
| 127 | + |
| 128 | +/** |
| 129 | + * Remove the CodeAnt pre-push hook (or just our section if appended). |
| 130 | + * |
| 131 | + * @param {string} workspacePath |
| 132 | + * @returns {{ removed: boolean, message: string }} |
| 133 | + */ |
| 134 | +export function removePushProtectionHook(workspacePath) { |
| 135 | + const gitRoot = findGitRoot(workspacePath); |
| 136 | + if (!gitRoot) { |
| 137 | + return { removed: false, message: 'Not a git repository' }; |
| 138 | + } |
| 139 | + |
| 140 | + const hooksDir = getHooksDir(gitRoot); |
| 141 | + const hookPath = path.join(hooksDir, 'pre-push'); |
| 142 | + |
| 143 | + if (!existsSync(hookPath)) { |
| 144 | + return { removed: false, message: 'No pre-push hook found' }; |
| 145 | + } |
| 146 | + |
| 147 | + const content = readFileSync(hookPath, 'utf-8'); |
| 148 | + if (!content.includes(HOOK_MARKER)) { |
| 149 | + return { removed: false, message: 'Hook is not managed by CodeAnt' }; |
| 150 | + } |
| 151 | + |
| 152 | + // Remove our block (between start and end markers) |
| 153 | + const remaining = replaceCodeAntBlock(content, '').trim(); |
| 154 | + if (!remaining || remaining === '#!/bin/sh') { |
| 155 | + // Nothing left — delete the file |
| 156 | + unlinkSync(hookPath); |
| 157 | + return { removed: true, message: 'Hook removed' }; |
| 158 | + } |
| 159 | + |
| 160 | + writeFileSync(hookPath, remaining + '\n', 'utf-8'); |
| 161 | + chmodSync(hookPath, 0o755); |
| 162 | + return { removed: true, message: 'CodeAnt section removed from hook' }; |
| 163 | +} |
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