From 9a4788a6f8978a1d6c5d3b1b12ac91db84e93bdf Mon Sep 17 00:00:00 2001
From: fengmk2 <fengmk2@gmail.com>
Date: Sun, 8 Jan 2023 02:07:30 +0800
Subject: [PATCH] feat: support peerDependenciesMeta

closes https://github.com/cnpm/npminstall/issues/436
---
 bin/install.js         | 15 ++++++++++-----
 lib/install_package.js | 28 ++++++++++++----------------
 2 files changed, 22 insertions(+), 21 deletions(-)

diff --git a/bin/install.js b/bin/install.js
index a687c761..4fcc33cb 100755
--- a/bin/install.js
+++ b/bin/install.js
@@ -361,6 +361,7 @@ debug('argv: %j, env: %j', argv, env);
     config.env.npm_rootpath = process.env.npm_rootpath || root;
     config.env.INIT_CWD = process.env.INIT_CWD || root;
     await installGlobal(config, context);
+    console.log('');
     return;
   }
 
@@ -521,13 +522,17 @@ debug('argv: %j, env: %j', argv, env);
   utils.exitWithError('npminstall', err);
 });
 
+let _versionSavePrefix = null;
 function getVersionSavePrefix() {
-  try {
-    return execSync('npm config get save-prefix').toString().trim();
-  } catch (err) {
-    debug(`exec npm config get save-prefix ERROR: ${err.message}`);
-    return '^';
+  if (_versionSavePrefix === null) {
+    try {
+      _versionSavePrefix = execSync('npm config get save-prefix').toString().trim();
+    } catch (err) {
+      debug(`exec npm config get save-prefix ERROR: ${err.message}`);
+      _versionSavePrefix = '^';
+    }
   }
+  return _versionSavePrefix;
 }
 
 function getStrictSSL() {
diff --git a/lib/install_package.js b/lib/install_package.js
index 2c6d3440..c51a02e5 100644
--- a/lib/install_package.js
+++ b/lib/install_package.js
@@ -226,6 +226,7 @@ async function _install(parentDir, pkg, ancestors, options, context) {
     const nodeModulesDir = path.join(realPkgDir, 'node_modules');
 
     const peerDependencies = realPkg.peerDependencies || {};
+    const peerDependenciesMeta = realPkg.peerDependenciesMeta || {};
     const needLinkPeerDependencies = [];
     if (Object.keys(peerDependencies).length > 0) {
       const unmatched = {};
@@ -243,9 +244,9 @@ async function _install(parentDir, pkg, ancestors, options, context) {
         // check in reverse
         const res = await matchAncestorDependencies(childPkg, reverseAncestors, options, context);
         if (res) {
-          pkgs.push({ name, version: res.ancestorSpec, peer: true });
+          pkgs.push({ name, version: res.ancestorSpec });
           needLinkPeerDependencies.push({ name, version: res.ancestorSpec });
-        } else {
+        } else if (peerDependenciesMeta[name]?.optional !== true) {
           unmatched[name] = version;
         }
       }
@@ -392,20 +393,15 @@ function forceFlatten(pkg) {
 
 // link module and bin files
 async function linkModule(pkg, parentDir, realPkg, realPkgDir, options) {
-  if (!pkg.peer) {
-    // fix concurrent install same bin name error
-    try {
-      await bin(parentDir, realPkg, realPkgDir, options);
-    } catch (err) {
-      if (err.code !== 'EEXIST') {
-        throw err;
-      }
-      // retry
-      await bin(parentDir, realPkg, realPkgDir, options);
+  // fix concurrent install same bin name error
+  try {
+    await bin(parentDir, realPkg, realPkgDir, options);
+  } catch (err) {
+    if (err.code !== 'EEXIST') {
+      throw err;
     }
-    await link(parentDir, realPkg, realPkgDir, pkg.alias, options);
-  } else {
-    // peer dependencies will link after check root
-    options.linkPeerDependencies.push({ parentDir, realPkg, realPkgDir });
+    // retry
+    await bin(parentDir, realPkg, realPkgDir, options);
   }
+  await link(parentDir, realPkg, realPkgDir, pkg.alias, options);
 }