fix(run-lifecycle): Do not execute on packages that lack the target script, avoiding spurious logs

Author: evocateur

Diff for: commands/__mocks__/@lerna/run-lifecycle.js

@@ -2,6 +2,7 @@
 
 const mockRunLifecycle = jest.fn(pkg => Promise.resolve(pkg));
 const mockCreateRunner = jest.fn(() => (pkg, stage) => {
+  // no longer the actual API, but approximates inner logic of default export
   if (pkg.scripts[stage]) {
     return mockRunLifecycle(pkg, stage);
   }

Diff for: utils/run-lifecycle/__tests__/run-lifecycle.test.js

@@ -8,11 +8,39 @@ const npmConf = require("@lerna/npm-conf");
 const runLifecycle = require("../run-lifecycle");
 
 describe("runLifecycle()", () => {
+  it("skips packages without scripts", async () => {
+    const pkg = {
+      name: "no-scripts",
+    };
+
+    const result = await runLifecycle(pkg, "foo", new Map());
+
+    expect(result).toBe(pkg);
+    expect(runScript).not.toHaveBeenCalled();
+  });
+
+  it("skips packages without matching script", async () => {
+    const pkg = {
+      name: "missing-script",
+      scripts: {
+        test: "foo",
+      },
+    };
+
+    const result = await runLifecycle(pkg, "bar", new Map());
+
+    expect(result).toBe(pkg);
+    expect(runScript).not.toHaveBeenCalled();
+  });
+
   it("calls npm-lifecycle with prepared arguments", async () => {
     const pkg = {
       name: "test-name",
       version: "1.0.0-test",
       location: "test-location",
+      scripts: {
+        preversion: "test",
+      },
     };
     const stage = "preversion";
     const opts = npmConf({ "custom-cli-flag": true });
@@ -47,6 +75,9 @@ describe("runLifecycle()", () => {
       name: "dashed-name",
       version: "1.0.0-dashed",
       location: "dashed-location",
+      scripts: {
+        prepublish: "test",
+      },
     };
     const dir = pkg.location;
     const stage = "prepublish";
@@ -82,6 +113,9 @@ describe("runLifecycle()", () => {
       name: "circular-name",
       version: "1.0.0-circular",
       location: "circular-location",
+      scripts: {
+        prepack: "test",
+      },
     };
     const stage = "prepack";
     const opts = new Map();

Diff for: utils/run-lifecycle/run-lifecycle.js

@@ -45,6 +45,12 @@ function runLifecycle(pkg, stage, _opts) {
   const dir = pkg.location;
   const config = {};
 
+  if (!pkg.scripts || !pkg.scripts[stage]) {
+    opts.log.silly("run-lifecycle", "No script for %j in %j, continuing", stage, pkg.name);
+
+    return Promise.resolve(pkg);
+  }
+
   // https://github.com/zkat/figgy-pudding/blob/7d68bd3/index.js#L42-L64
   for (const [key, val] of opts) {
     // omit falsy values and circular objects
@@ -107,11 +113,5 @@ function runLifecycle(pkg, stage, _opts) {
 function createRunner(commandOptions) {
   const cfg = npmConf(commandOptions).snapshot;
 
-  return (pkg, stage) => {
-    if (pkg.scripts && pkg.scripts[stage]) {
-      return runLifecycle(pkg, stage, cfg);
-    }
-
-    return Promise.resolve(pkg);
-  };
+  return (pkg, stage) => runLifecycle(pkg, stage, cfg);
 }