From 0a147789265aa84859a1a8232b6c8e912af1ef4b Mon Sep 17 00:00:00 2001
From: Joel Denning <joeldenning@gmail.com>
Date: Fri, 13 Mar 2020 21:43:28 -0600
Subject: [PATCH] Add support for --frozen-lockfile flag. Resolves #17

---
 lib/narn-lib.js      | 11 ++++++++++-
 test/install.test.js | 13 +++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/lib/narn-lib.js b/lib/narn-lib.js
index b145e1d..b9e67a4 100644
--- a/lib/narn-lib.js
+++ b/lib/narn-lib.js
@@ -40,7 +40,9 @@ exports.detectNpm = function detectNpm(args) {
 exports.getYarnArgs = narnArgs => narnArgs;
 
 exports.getNpmArgs = (narnArgs, isPnpm = false) => {
-  const yarnArgs = minimist(narnArgs, { boolean: ["dev", "D", "--latest"] });
+  const yarnArgs = minimist(narnArgs, {
+    boolean: ["dev", "D", "latest", "frozen-lockfile"]
+  });
   const yarnCommands = yarnArgs._;
   const yarnTarget = yarnCommands.length > 0 ? yarnCommands[0] : "install";
   const yarnSubCommands = yarnCommands.slice(1);
@@ -51,6 +53,13 @@ exports.getNpmArgs = (narnArgs, isPnpm = false) => {
     case "install":
       npmTarget = "install";
       npmArgs = [];
+      if (yarnArgs["frozen-lockfile"]) {
+        if (isPnpm) {
+          npmArgs.push("--frozen-lockfile");
+        } else {
+          npmTarget = "ci";
+        }
+      }
       break;
     case "add":
       npmTarget = "install";
diff --git a/test/install.test.js b/test/install.test.js
index d380f5d..a0b746c 100644
--- a/test/install.test.js
+++ b/test/install.test.js
@@ -8,4 +8,17 @@ describe("narn install", () => {
   it("works when install is specified", () => {
     expect(getNpmArgs(["install"])).toEqual(["install"]);
   });
+
+  describe("--frozen-lockfile", () => {
+    it("works with npm", () => {
+      expect(getNpmArgs(["install", "--frozen-lockfile"])).toEqual(["ci"]);
+    });
+
+    it("works with pnpm", () => {
+      expect(getNpmArgs(["install", "--frozen-lockfile"], true)).toEqual([
+        "install",
+        "--frozen-lockfile"
+      ]);
+    });
+  });
 });