@earendil-works/pi-coding-agent
Version:
Coding agent CLI with read, bash, edit, write tools and session management
455 lines • 18.7 kB
JavaScript
import { accessSync, constants, existsSync, readFileSync, realpathSync } from "fs";
import { homedir } from "os";
import { basename, dirname, join, resolve, sep, win32 } from "path";
import { fileURLToPath } from "url";
import { spawnProcessSync } from "./utils/child-process.js";
import { normalizePath } from "./utils/paths.js";
// =============================================================================
// Package Detection
// =============================================================================
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
/**
* Detect if we're running as a Bun compiled binary.
* Bun binaries have import.meta.url containing "$bunfs", "~BUN", or "%7EBUN" (Bun's virtual filesystem path)
*/
export const isBunBinary = import.meta.url.includes("$bunfs") || import.meta.url.includes("~BUN") || import.meta.url.includes("%7EBUN");
/** Detect if Bun is the runtime (compiled binary or bun run) */
export const isBunRuntime = !!process.versions.bun;
function normalizeSelfUpdatePackageTarget(target) {
if (typeof target === "string") {
return { packageName: target, installSpec: target };
}
return { packageName: target.packageName, installSpec: target.installSpec ?? target.packageName };
}
function makeSelfUpdateCommand(installStep, uninstallStep) {
if (!uninstallStep)
return installStep;
return {
...installStep,
display: `${uninstallStep.display} && ${installStep.display}`,
steps: [uninstallStep, installStep],
};
}
function makeSelfUpdateCommandStep(command, args) {
return {
command,
args,
display: [command, ...args].map((arg) => (/\s/.test(arg) ? `"${arg}"` : arg)).join(" "),
};
}
export function detectInstallMethod() {
if (isBunBinary) {
return "bun-binary";
}
const resolvedPath = `${__dirname}\0${process.execPath || ""}`.toLowerCase().replace(/\\/g, "/");
if (resolvedPath.includes("/pnpm/") || resolvedPath.includes("/.pnpm/")) {
return "pnpm";
}
if (resolvedPath.includes("/yarn/") || resolvedPath.includes("/.yarn/")) {
return "yarn";
}
if (isBunRuntime || resolvedPath.includes("/install/global/node_modules/")) {
return "bun";
}
if (resolvedPath.includes("/npm/") || resolvedPath.includes("/node_modules/")) {
return "npm";
}
return "unknown";
}
function getInferredNpmInstall() {
const packageDir = getPackageDir();
const path = process.platform === "win32" || packageDir.includes("\\") ? win32 : { basename, dirname };
const parent = path.dirname(packageDir);
let root;
if (path.basename(parent).startsWith("@") && path.basename(path.dirname(parent)) === "node_modules") {
root = path.dirname(parent);
}
else if (path.basename(parent) === "node_modules") {
root = parent;
}
if (!root)
return undefined;
const rootParent = path.dirname(root);
if (path.basename(rootParent) === "lib")
return { root, prefix: path.dirname(rootParent) };
// Windows global npm prefixes use `<prefix>\\node_modules`, which is
// indistinguishable from local project installs by path shape alone. Do not
// infer unsupported Windows custom prefixes without `npm root -g` evidence.
return undefined;
}
function getSelfUpdateCommandForMethod(method, installedPackageName, updatePackageTarget = installedPackageName, npmCommand) {
const target = normalizeSelfUpdatePackageTarget(updatePackageTarget);
switch (method) {
case "bun-binary":
return undefined;
case "pnpm": {
const match = readCommandOutput("pnpm", ["root", "-g"])
? undefined
: /^(.*[\\/]global[\\/][^\\/]+)[\\/]\.pnpm[\\/]/.exec(getPackageDir());
const binDirArgs = match
? [`--config.global-bin-dir=${process.env.PNPM_HOME || dirname(dirname(match[1]))}`]
: [];
return makeSelfUpdateCommand(makeSelfUpdateCommandStep("pnpm", [
"install",
"-g",
"--ignore-scripts",
"--config.minimumReleaseAge=0",
...binDirArgs,
target.installSpec,
]), target.packageName === installedPackageName
? undefined
: makeSelfUpdateCommandStep("pnpm", ["remove", "-g", ...binDirArgs, installedPackageName]));
}
case "yarn":
return makeSelfUpdateCommand(makeSelfUpdateCommandStep("yarn", ["global", "add", "--ignore-scripts", target.installSpec]), target.packageName === installedPackageName
? undefined
: makeSelfUpdateCommandStep("yarn", ["global", "remove", installedPackageName]));
case "bun":
return makeSelfUpdateCommand(makeSelfUpdateCommandStep("bun", [
"install",
"-g",
"--ignore-scripts",
"--minimum-release-age=0",
target.installSpec,
]), target.packageName === installedPackageName
? undefined
: makeSelfUpdateCommandStep("bun", ["uninstall", "-g", installedPackageName]));
case "npm": {
const [command = "npm", ...npmArgs] = npmCommand ?? [];
const inferred = npmCommand?.length ? undefined : getInferredNpmInstall();
const prefixArgs = [...npmArgs, ...(inferred ? ["--prefix", inferred.prefix] : [])];
const installStep = makeSelfUpdateCommandStep(command, [
...prefixArgs,
"install",
"-g",
"--ignore-scripts",
"--min-release-age=0",
target.installSpec,
]);
const uninstallStep = target.packageName === installedPackageName
? undefined
: makeSelfUpdateCommandStep(command, [...prefixArgs, "uninstall", "-g", installedPackageName]);
return makeSelfUpdateCommand(installStep, uninstallStep);
}
case "unknown":
return undefined;
}
}
function readCommandOutput(command, args, options = {}) {
const result = spawnProcessSync(command, args, {
encoding: "utf-8",
stdio: ["ignore", "pipe", "pipe"],
});
if (result.status === 0)
return result.stdout.trim() || undefined;
if (options.requireSuccess) {
const reason = result.error?.message || result.stderr.trim() || `exit code ${result.status ?? "unknown"}`;
throw new Error(`Failed to run ${[command, ...args].join(" ")}: ${reason}`);
}
return undefined;
}
function getGlobalPackageRoots(method, _packageName, npmCommand) {
switch (method) {
case "npm": {
const configured = !!npmCommand?.length;
const [command = "npm", ...npmArgs] = npmCommand ?? [];
if (configured && command === "bun") {
const bunBin = readCommandOutput(command, [...npmArgs, "pm", "bin", "-g"], {
requireSuccess: true,
});
const roots = [join(homedir(), ".bun", "install", "global", "node_modules")];
if (bunBin) {
roots.push(join(dirname(bunBin), "install", "global", "node_modules"));
}
return roots;
}
const root = readCommandOutput(command, [...npmArgs, "root", "-g"], {
requireSuccess: configured,
});
const inferred = configured ? undefined : getInferredNpmInstall();
return [root, inferred?.root].filter((x) => !!x);
}
case "pnpm": {
const root = readCommandOutput("pnpm", ["root", "-g"]);
if (root)
return [root, dirname(root)];
const match = /^(.*[\\/]global[\\/][^\\/]+)[\\/]\.pnpm[\\/]/.exec(getPackageDir());
return match ? [match[1]] : [];
}
case "yarn": {
const dir = readCommandOutput("yarn", ["global", "dir"]);
return dir ? [dir, join(dir, "node_modules")] : [];
}
case "bun": {
const bunBin = readCommandOutput("bun", ["pm", "bin", "-g"]);
const roots = [join(homedir(), ".bun", "install", "global", "node_modules")];
if (bunBin) {
roots.push(join(dirname(bunBin), "install", "global", "node_modules"));
}
return roots;
}
case "bun-binary":
case "unknown":
return [];
}
}
function normalizeExistingPathForComparison(path, resolveSymlinks) {
const resolvedPath = resolve(path);
if (!existsSync(resolvedPath)) {
return undefined;
}
let normalizedPath = resolvedPath;
if (resolveSymlinks) {
try {
normalizedPath = realpathSync(resolvedPath);
}
catch {
return undefined;
}
}
if (process.platform === "win32") {
normalizedPath = normalizedPath.toLowerCase();
}
return normalizedPath;
}
function getPathComparisonCandidates(path) {
return Array.from(new Set([normalizeExistingPathForComparison(path, false), normalizeExistingPathForComparison(path, true)].filter((candidate) => !!candidate)));
}
function getEntrypointPackageDir() {
const entrypoint = process.argv[1];
if (!entrypoint)
return undefined;
let dir = dirname(entrypoint);
while (dir !== dirname(dir)) {
if (existsSync(join(dir, "package.json"))) {
return dir;
}
dir = dirname(dir);
}
return undefined;
}
function isSelfUpdatePathWritable() {
const packageDir = getPackageDir();
try {
accessSync(packageDir, constants.W_OK);
accessSync(dirname(packageDir), constants.W_OK);
return true;
}
catch {
return false;
}
}
function isManagedByGlobalPackageManager(method, packageName, npmCommand) {
const packageDirs = [getPackageDir(), getEntrypointPackageDir()].filter((dir) => !!dir);
const packageDirCandidates = packageDirs.flatMap((dir) => getPathComparisonCandidates(dir));
return getGlobalPackageRoots(method, packageName, npmCommand).some((root) => {
return getPathComparisonCandidates(root).some((normalizedRoot) => {
const rootPrefix = normalizedRoot.endsWith(sep) ? normalizedRoot : `${normalizedRoot}${sep}`;
return packageDirCandidates.some((packageDir) => packageDir.startsWith(rootPrefix));
});
});
}
export function getSelfUpdateCommand(packageName, npmCommand, updatePackageTarget = packageName) {
const method = detectInstallMethod();
const command = getSelfUpdateCommandForMethod(method, packageName, updatePackageTarget, npmCommand);
if (!command || !isManagedByGlobalPackageManager(method, packageName, npmCommand) || !isSelfUpdatePathWritable()) {
return undefined;
}
return command;
}
export function getSelfUpdateUnavailableInstruction(packageName, npmCommand, updatePackageTarget = packageName) {
const method = detectInstallMethod();
const target = normalizeSelfUpdatePackageTarget(updatePackageTarget);
if (method === "bun-binary") {
return `Download from: https://github.com/earendil-works/pi-mono/releases/latest`;
}
const command = getSelfUpdateCommandForMethod(method, packageName, target, npmCommand);
if (command) {
if (isManagedByGlobalPackageManager(method, packageName, npmCommand) && !isSelfUpdatePathWritable()) {
return `This installation is managed by a global ${method} install, but the install path is not writable. Update it yourself with: ${command.display}`;
}
return `This installation is not managed by a global ${method} install. Update it with the package manager, wrapper, or source checkout that provides it.`;
}
return `Update ${target.installSpec} using the package manager, wrapper, or source checkout that provides this installation.`;
}
export function getUpdateInstruction(packageName) {
const method = detectInstallMethod();
const command = getSelfUpdateCommandForMethod(method, packageName);
if (command) {
return `Run: ${command.display}`;
}
return getSelfUpdateUnavailableInstruction(packageName);
}
// =============================================================================
// Package Asset Paths (shipped with executable)
// =============================================================================
/**
* Get the base directory for resolving package assets (themes, package.json, README.md, CHANGELOG.md).
* - For Bun binary: returns the directory containing the executable
* - For Node.js (dist/): returns __dirname (the dist/ directory)
* - For tsx (src/): returns parent directory (the package root)
*/
export function getPackageDir() {
// Allow override via environment variable (useful for Nix/Guix where store paths tokenize poorly)
const envDir = process.env.PI_PACKAGE_DIR;
if (envDir) {
return normalizePath(envDir);
}
if (isBunBinary) {
// Bun binary: process.execPath points to the compiled executable
return dirname(process.execPath);
}
// Node.js: walk up from __dirname until we find package.json
let dir = __dirname;
while (dir !== dirname(dir)) {
if (existsSync(join(dir, "package.json"))) {
return dir;
}
dir = dirname(dir);
}
// Fallback (shouldn't happen)
return __dirname;
}
/**
* Get path to built-in themes directory (shipped with package)
* - For Bun binary: theme/ next to executable
* - For Node.js (dist/): dist/modes/interactive/theme/
* - For tsx (src/): src/modes/interactive/theme/
*/
export function getThemesDir() {
if (isBunBinary) {
return join(getPackageDir(), "theme");
}
// Theme is in modes/interactive/theme/ relative to src/ or dist/
const packageDir = getPackageDir();
const srcOrDist = existsSync(join(packageDir, "src")) ? "src" : "dist";
return join(packageDir, srcOrDist, "modes", "interactive", "theme");
}
/**
* Get path to HTML export template directory (shipped with package)
* - For Bun binary: export-html/ next to executable
* - For Node.js (dist/): dist/core/export-html/
* - For tsx (src/): src/core/export-html/
*/
export function getExportTemplateDir() {
if (isBunBinary) {
return join(getPackageDir(), "export-html");
}
const packageDir = getPackageDir();
const srcOrDist = existsSync(join(packageDir, "src")) ? "src" : "dist";
return join(packageDir, srcOrDist, "core", "export-html");
}
/** Get path to package.json */
export function getPackageJsonPath() {
return join(getPackageDir(), "package.json");
}
/** Get path to README.md */
export function getReadmePath() {
return resolve(join(getPackageDir(), "README.md"));
}
/** Get path to docs directory */
export function getDocsPath() {
return resolve(join(getPackageDir(), "docs"));
}
/** Get path to examples directory */
export function getExamplesPath() {
return resolve(join(getPackageDir(), "examples"));
}
/** Get path to CHANGELOG.md */
export function getChangelogPath() {
return resolve(join(getPackageDir(), "CHANGELOG.md"));
}
/**
* Get path to built-in interactive assets directory.
* - For Bun binary: assets/ next to executable
* - For Node.js (dist/): dist/modes/interactive/assets/
* - For tsx (src/): src/modes/interactive/assets/
*/
export function getInteractiveAssetsDir() {
if (isBunBinary) {
return join(getPackageDir(), "assets");
}
const packageDir = getPackageDir();
const srcOrDist = existsSync(join(packageDir, "src")) ? "src" : "dist";
return join(packageDir, srcOrDist, "modes", "interactive", "assets");
}
/** Get path to a bundled interactive asset */
export function getBundledInteractiveAssetPath(name) {
return join(getInteractiveAssetsDir(), name);
}
let pkg = {};
try {
pkg = JSON.parse(readFileSync(getPackageJsonPath(), "utf-8"));
}
catch (e) {
const err = e;
if (err.code !== "ENOENT")
throw e;
}
const piConfigName = pkg.piConfig?.name;
export const PACKAGE_NAME = pkg.name || "@earendil-works/pi-coding-agent";
export const APP_NAME = piConfigName || "pi";
export const APP_TITLE = piConfigName ? APP_NAME : "π";
export const CONFIG_DIR_NAME = pkg.piConfig?.configDir || ".pi";
export const VERSION = pkg.version || "0.0.0";
// e.g., PI_CODING_AGENT_DIR or TAU_CODING_AGENT_DIR
export const ENV_AGENT_DIR = `${APP_NAME.toUpperCase()}_CODING_AGENT_DIR`;
export const ENV_SESSION_DIR = `${APP_NAME.toUpperCase()}_CODING_AGENT_SESSION_DIR`;
export function expandTildePath(path) {
return normalizePath(path);
}
const DEFAULT_SHARE_VIEWER_URL = "https://pi.dev/session/";
/** Get the share viewer URL for a gist ID */
export function getShareViewerUrl(gistId) {
const baseUrl = process.env.PI_SHARE_VIEWER_URL || DEFAULT_SHARE_VIEWER_URL;
return `${baseUrl}#${gistId}`;
}
// =============================================================================
// User Config Paths (~/.pi/agent/*)
// =============================================================================
/** Get the agent config directory (e.g., ~/.pi/agent/) */
export function getAgentDir() {
const envDir = process.env[ENV_AGENT_DIR];
if (envDir) {
return expandTildePath(envDir);
}
return join(homedir(), CONFIG_DIR_NAME, "agent");
}
/** Get path to user's custom themes directory */
export function getCustomThemesDir() {
return join(getAgentDir(), "themes");
}
/** Get path to models.json */
export function getModelsPath() {
return join(getAgentDir(), "models.json");
}
/** Get path to auth.json */
export function getAuthPath() {
return join(getAgentDir(), "auth.json");
}
/** Get path to settings.json */
export function getSettingsPath() {
return join(getAgentDir(), "settings.json");
}
/** Get path to tools directory */
export function getToolsDir() {
return join(getAgentDir(), "tools");
}
/** Get path to managed binaries directory (fd, rg) */
export function getBinDir() {
return join(getAgentDir(), "bin");
}
/** Get path to prompt templates directory */
export function getPromptsDir() {
return join(getAgentDir(), "prompts");
}
/** Get path to sessions directory */
export function getSessionsDir() {
return join(getAgentDir(), "sessions");
}
/** Get path to debug log file */
export function getDebugLogPath() {
return join(getAgentDir(), `${APP_NAME}-debug.log`);
}
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