Add --only-updated option to exec and run subcommands

README.md

@@ -674,6 +674,20 @@ $ lerna bootstrap --scope "package-*" --ignore "package-util-*" --include-filter
 # package matched by "package-*"
 ```
 
+#### --only-updated
+
+When executing a script or command, only run the script or command on packages that have been updated since the last release.
+
+A package is considered "updated" using the same rules as `lerna updated`.
+
+```sh
+$ lerna exec --only-updated -- ls -la
+```
+
+```
+$ lerna run --only-updated test
+```
+
 #### --loglevel [silent|error|warn|success|info|verbose|silly]
 
 What level of logs to report.  On failure, all logs are written to lerna-debug.log in the current working directory.

src/PackageUtilities.js

@@ -157,6 +157,13 @@ export default class PackageUtilities {
     return packages;
   }
 
+  static filterPackagesThatAreNotUpdated(packagesToFilter, packageUpdates) {
+    return packageUpdates
+      .map((update) => update.package)
+      .filter((pkg) => packagesToFilter.some((p) => p.name === pkg.name))
+    ;
+  }
+
   static topologicallyBatchPackages(packagesToBatch, { depsOnly } = {}) {
     // We're going to be chopping stuff out of this array, so copy it.
     const packages = packagesToBatch.slice();

src/commands/ExecCommand.js

@@ -1,8 +1,10 @@
 import async from "async";
 
 import ChildProcessUtilities from "../ChildProcessUtilities";
+
 import Command from "../Command";
 import PackageUtilities from "../PackageUtilities";
+import UpdatedPackagesCollector from "../UpdatedPackagesCollector";
 
 export function handler(argv) {
   return new ExecCommand([argv.command, ...argv.args], argv).run();
@@ -13,6 +15,10 @@ export const command = "exec <command> [args..]";
 export const describe = "Run an arbitrary command in each package.";
 
 export const builder = {
+  "only-updated": {
+    "describe": "When executing scripts/commands, only run the script/command on packages which "
+    + "have been updated since the last release"
+  },
   "parallel": {
     group: "Command Options:",
     describe: "Run command in all packages with unlimited concurrency, streaming prefixed output",
@@ -33,8 +39,18 @@ export default class ExecCommand extends Command {
     // don't interrupt spawned or streaming stdio
     this.logger.disableProgress();
 
+    let filteredPackages = this.filteredPackages;
+    if (this.flags.onlyUpdated) {
+      const updatedPackagesCollector = new UpdatedPackagesCollector(this);
+      const packageUpdates = updatedPackagesCollector.getUpdates();
+      filteredPackages = PackageUtilities.filterPackagesThatAreNotUpdated(
+        filteredPackages,
+        packageUpdates
+      );
+    }
+
     this.batchedPackages = this.toposort
-      ? PackageUtilities.topologicallyBatchPackages(this.filteredPackages)
+      ? PackageUtilities.topologicallyBatchPackages(filteredPackages)
       : [this.filteredPackages];
 
     callback(null, true);

src/commands/RunCommand.js

@@ -4,6 +4,7 @@ import Command from "../Command";
 import NpmUtilities from "../NpmUtilities";
 import output from "../utils/output";
 import PackageUtilities from "../PackageUtilities";
+import UpdatedPackagesCollector from "../UpdatedPackagesCollector";
 
 export function handler(argv) {
   return new RunCommand([argv.script, ...argv.args], argv).run();
@@ -19,6 +20,10 @@ export const builder = {
     describe: "Stream output with lines prefixed by package.",
     type: "boolean",
   },
+  "only-updated": {
+    "describe": "When executing scripts/commands, only run the script/command on packages which "
+    + "have been updated since the last release"
+  },
   "parallel": {
     group: "Command Options:",
     describe: "Run script in all packages with unlimited concurrency, streaming prefixed output",
@@ -36,10 +41,20 @@ export default class RunCommand extends Command {
       return;
     }
 
+    let filteredPackages = this.filteredPackages;
+    if (this.flags.onlyUpdated) {
+      const updatedPackagesCollector = new UpdatedPackagesCollector(this);
+      const packageUpdates = updatedPackagesCollector.getUpdates();
+      filteredPackages = PackageUtilities.filterPackagesThatAreNotUpdated(
+        filteredPackages,
+        packageUpdates
+      );
+    }
+
     if (this.script === "test" || this.script === "env") {
-      this.packagesWithScript = this.filteredPackages;
+      this.packagesWithScript = filteredPackages;
     } else {
-      this.packagesWithScript = this.filteredPackages
+      this.packagesWithScript = filteredPackages
         .filter((pkg) => pkg.scripts && pkg.scripts[this.script]);
     }
 

test/ExecCommand.js

@@ -3,6 +3,7 @@ import path from "path";
 
 // mocked modules
 import ChildProcessUtilities from "../src/ChildProcessUtilities";
+import UpdatedPackagesCollector from "../src/UpdatedPackagesCollector";
 
 // helpers
 import callsBack from "./helpers/callsBack";
@@ -13,6 +14,7 @@ import initFixture from "./helpers/initFixture";
 import ExecCommand from "../src/commands/ExecCommand";
 
 jest.mock("../src/ChildProcessUtilities");
+jest.mock("../src/UpdatedPackagesCollector");
 
 // silence logs
 log.level = "silent";
@@ -110,6 +112,40 @@ describe("ExecCommand", () => {
       }));
     });
 
+    it("should filter packages that are not updated when onlyUpdate", (done) => {
+
+      UpdatedPackagesCollector.prototype.getUpdates = jest.fn(() => [{ package: {
+        name: "package-2",
+        location: path.join(testDir, "packages/package-2")
+      } }]);
+
+      const execCommand = new ExecCommand(["ls"], {
+        onlyUpdated: true,
+      }, testDir);
+
+      execCommand.runValidations();
+      execCommand.runPreparations();
+
+      execCommand.runCommand(exitWithCode(0, (err) => {
+        if (err) return done.fail(err);
+
+        try {
+          expect(ChildProcessUtilities.spawn).toHaveBeenCalledTimes(1);
+          expect(ChildProcessUtilities.spawn).lastCalledWith("ls", [], {
+            cwd: path.join(testDir, "packages/package-2"),
+            env: expect.objectContaining({
+              LERNA_PACKAGE_NAME: "package-2",
+            }),
+            shell: true,
+          }, expect.any(Function));
+
+          done();
+        } catch (ex) {
+          done.fail(ex);
+        }
+      }));
+    });
+
     it("should run a command", (done) => {
       const execCommand = new ExecCommand(["ls"], {}, testDir);
 

test/PackageUtilities.js

@@ -182,6 +182,57 @@ describe("PackageUtilities", () => {
     });
   });
 
+  describe(".filterPackagesThatAreNotUpdated()", () => {
+
+    it("should return an empty array when there are no packages to filter", () => {
+      const packagesToFilter = [];
+      const packageUpdates = [
+        { package: { name: "ghi" } },
+        { package: { name: "xyz" } }
+      ];
+      const updatedPackages = PackageUtilities.filterPackagesThatAreNotUpdated(
+        packagesToFilter,
+        packageUpdates
+      );
+      expect(updatedPackages).toHaveLength(0);
+    });
+
+    it("should return an empty array when there are no packages that have been updated", () => {
+      const packagesToFilter = [
+        { name: "abc" },
+        { name: "def" },
+        { name: "ghi" },
+        { name: "jkl" },
+      ];
+      const packageUpdates = [];
+      const updatedPackages = PackageUtilities.filterPackagesThatAreNotUpdated(
+        packagesToFilter,
+        packageUpdates
+      );
+      expect(updatedPackages).toHaveLength(0);
+    });
+
+    it("should return only packages that are to be filtered and have been updated", () => {
+      const packagesToFilter = [
+        { name: "abc" },
+        { name: "def" },
+        { name: "ghi" },
+        { name: "jkl" },
+      ];
+      const packageUpdates = [
+        { package: { name: "ghi" } },
+        { package: { name: "xyz" } },
+      ];
+      const updatedPackages = PackageUtilities.filterPackagesThatAreNotUpdated(
+        packagesToFilter,
+        packageUpdates
+      );
+      expect(updatedPackages).toHaveLength(1);
+      expect(updatedPackages).toEqual([{ name: "ghi" }]);
+    });
+
+  });
+
   describe(".topologicallyBatchPackages()", () => {
     let packages;
 

test/RunCommand.js

@@ -1,8 +1,10 @@
+import path from "path";
 import log from "npmlog";
 
 // mocked modules
 import NpmUtilities from "../src/NpmUtilities";
 import output from "../src/utils/output";
+import UpdatedPackagesCollector from "../src/UpdatedPackagesCollector";
 
 // helpers
 import callsBack from "./helpers/callsBack";
@@ -147,6 +149,34 @@ describe("RunCommand", () => {
       });
     });
 
+    it("should filter packages that are not updated when onlyUpdate", (done) => {
+      UpdatedPackagesCollector.prototype.getUpdates = jest.fn(() => [{ package: {
+        name: "package-3",
+        location: path.join(testDir, "packages/package-3"),
+        scripts: { "my-script": "echo package-3" }
+      } }]);
+
+      const runCommand = new RunCommand(["my-script"], {
+        onlyUpdated: true,
+      }, testDir);
+
+      runCommand.runValidations();
+      runCommand.runPreparations();
+
+      runCommand.runCommand(exitWithCode(0, (err) => {
+        if (err) return done.fail(err);
+
+        try {
+          expect(ranInPackages(testDir))
+            .toMatchSnapshot("run <script> --only-updated");
+
+          done();
+        } catch (ex) {
+          done.fail(ex);
+        }
+      }));
+    });
+
     it("runs a script in all packages with --parallel", (done) => {
       const runCommand = new RunCommand(["env"], {
         parallel: true,
@@ -168,6 +198,7 @@ describe("RunCommand", () => {
         }
       }));
     });
+
   });
 
   describe("with --include-filtered-dependencies", () => {
@@ -200,4 +231,5 @@ describe("RunCommand", () => {
       }));
     });
   });
+
 });

test/__snapshots__/RunCommand.js.snap

@@ -6,6 +6,12 @@ Array [
 ]
 `;
 
+exports[`run <script> --only-updated 1`] = `
+Array [
+  "packages/package-3 my-script",
+]
+`;
+
 exports[`run <script> --parallel 1`] = `
 Array [
   "packages/package-1 env",