Add --append-git-tag

Fixes cookpete#190 if you use --append-git-tag "--merged" with Git 2.7+

README.md

@@ -49,6 +49,7 @@ Options:
       --hide-credit                   # hide auto-changelog credit
       --handlebars-setup [file]       # handlebars setup file
       --append-git-log [string]       # string to append to git log command
+      --append-git-tag [string]       # string to append to git tag command
       --prepend                       # prepend changelog to output file
       --stdout                        # output changelog to stdout
   -V, --version                       # output the version number

src/run.js

@@ -15,6 +15,7 @@ const DEFAULT_OPTIONS = {
   tagPrefix: '',
   sortCommits: 'relevance',
   appendGitLog: '',
+  appendGitTag: '',
   config: '.auto-changelog'
 }
 
@@ -52,6 +53,7 @@ const getOptions = async argv => {
     .option('--hide-credit', 'hide auto-changelog credit')
     .option('--handlebars-setup <file>', 'handlebars setup file')
     .option('--append-git-log <string>', 'string to append to git log command')
+    .option('--append-git-tag <string>', 'string to append to git tag command')
     .option('--prepend', 'prepend changelog to output file')
     .option('--stdout', 'output changelog to stdout')
     .version(version)

src/tags.js

@@ -6,7 +6,7 @@ const MATCH_V = /^v\d/
 
 const fetchTags = async (options, remote) => {
   const format = `%(refname:short)${DIVIDER}%(creatordate:short)`
-  const tags = (await cmd(`git tag -l --sort=-creatordate --format=${format}`))
+  const tags = (await cmd(`git tag -l --sort=-creatordate --format=${format} ${options.appendGitTag}`))
     .trim()
     .split('\n')
     .map(parseTag(options))