fix(publish): Ignore non-release tags when detecting from-git (#1782)

Author: haraldF

Diff for: commands/publish/index.js

@@ -212,7 +212,7 @@ class PublishCommand extends Command {
       }
 
       if (this.project.isIndependent()) {
-        return taggedPackageNames.map(name => this.packageGraph.get(name));
+        return taggedPackageNames.map(name => this.packageGraph.get(name)).filter(name => name !== undefined);
       }
 
       return getTaggedPackages(this.packageGraph, this.project.rootPath, this.execOpts);

Diff for: integration/lerna-publish-custom-tag.test.js

@@ -0,0 +1,30 @@
+"use strict";
+
+const path = require("path");
+
+const cliRunner = require("@lerna-test/cli-runner");
+const gitTag = require("@lerna-test/git-tag");
+const cloneFixture = require("@lerna-test/clone-fixture")(
+  path.resolve(__dirname, "../commands/publish/__tests__")
+);
+
+// stabilize changelog commit SHA and datestamp
+expect.addSnapshotSerializer(require("@lerna-test/serialize-changelog"));
+
+const env = {
+  // never actually upload when calling `npm publish`
+  npm_config_dry_run: true,
+  // skip npm package validation, none of the stubs are real
+  LERNA_INTEGRATION: "SKIP",
+};
+
+test("lerna publish from-git handles custom tags", async () => {
+  const { cwd } = await cloneFixture("independent");
+
+  await gitTag(cwd, "some-unrelated-tag");
+
+  const args = ["publish", "--yes", "from-git"];
+
+  const { stdout } = await cliRunner(cwd, env)(...args);
+  expect(stdout).toMatchInlineSnapshot("", ``);
+});