Merge pull request #12 from Updater/analyze-commits-log-result

feat(analyze-commits): log number of commits passing package filter

src/analyze-commits.js

@@ -1,11 +1,34 @@
+const { pipeP } = require('ramda');
 const commitAnalyzer = require('@semantic-release/commit-analyzer');
+const readPkg = require('read-pkg');
 const { filterCommits } = require('./options-transforms');
 const onlyPackageCommits = require('./only-package-commits');
 
+// Async version of Ramda's `tap`
+const tapA = fn => async x => {
+  await fn(x);
+  return x;
+};
+
+const logFilteredCommitCount = logger => async ({ commits }) => {
+  const { name } = await readPkg();
+
+  logger.log(
+    'Found %s commits for package %s since last release',
+    commits.length,
+    name
+  );
+};
+
 async function analyzeCommits(pluginConf, options) {
+  const { logger } = options;
+
   return commitAnalyzer(
     pluginConf,
-    await filterCommits(onlyPackageCommits)(options)
+    await pipeP(
+      filterCommits(onlyPackageCommits),
+      tapA(logFilteredCommitCount(logger))
+    )(options)
   );
 }