Add --unreleased-only option

Fixes #165

README.md

@@ -43,6 +43,7 @@ Options:
       --starting-version [tag]        # specify earliest version to include in changelog
       --sort-commits [property]       # sort commits by property [relevance, date, date-desc], default: relevance
       --release-summary               # display tagged commit message body as release summary
+      --unreleased-only               # only output unreleased changes
       --handlebars-setup [file]       # handlebars setup file
       --append-git-log [string]       # string to append to git log command
       --stdout                        # output changelog to stdout

src/releases.js

@@ -44,12 +44,16 @@ function parseReleases (tags, remote, latestVersion, options, onParsed) {
     const diff = previousTag ? `${previousTag}..${tag}` : tag
     return createRelease(tag, previousTag, date, diff, remote, options, onParsed)
   })
-  if (latestVersion || options.unreleased) {
+  if (latestVersion || options.unreleased || options.unreleasedOnly) {
     const tag = latestVersion || null
     const previousTag = tags[0].tag
     const date = new Date().toISOString()
     const diff = `${previousTag}..`
-    releases.unshift(createRelease(tag, previousTag, date, diff, remote, options, onParsed))
+    const unreleased = createRelease(tag, previousTag, date, diff, remote, options, onParsed)
+    if (options.unreleasedOnly) {
+      return Promise.all([unreleased])
+    }
+    releases.unshift(unreleased)
   }
   return Promise.all(releases.filter(release => release))
 }

src/run.js

@@ -47,6 +47,7 @@ async function getOptions (argv) {
     .option('--starting-version <tag>', 'specify earliest version to include in changelog')
     .option('--sort-commits <property>', `sort commits by property [relevance, date, date-desc], default: ${DEFAULT_OPTIONS.sortCommits}`)
     .option('--release-summary', 'use tagged commit message body as release summary')
+    .option('--unreleased-only', 'only output unreleased changes')
     .option('--handlebars-setup <file>', 'handlebars setup file')
     .option('--append-git-log <string>', 'string to append to git log command')
     .option('--stdout', 'output changelog to stdout')