chore(build): integrate git-chglog

git-chglog is a tool to generate CHANGELOG files. In the context of R,
we will be generating NEWS.md with this tool.

.Rbuildignore

@@ -1,3 +1,4 @@
+.chglog
 .lintr
 ^.*\.Rproj$
 ^\.Rproj\.user$

.chglog/CHANGELOG.tpl.md

@@ -0,0 +1,56 @@
+{{ if .Versions -}}
+<a name="unreleased"></a>
+## [Unreleased]
+
+{{ if .Unreleased.CommitGroups -}}
+{{ range .Unreleased.CommitGroups -}}
+### {{ .Title }}
+{{ range .Commits -}}
+- {{ if .Scope }}**{{ .Scope }}:** {{ end }}{{ .Subject }}
+{{ end }}
+{{ end -}}
+{{ end -}}
+{{ end -}}
+
+{{ range .Versions }}
+<a name="{{ .Tag.Name }}"></a>
+## {{ if .Tag.Previous }}[{{ .Tag.Name }}]{{ else }}{{ .Tag.Name }}{{ end }} - {{ datetime "2006-01-02" .Tag.Date }}
+{{ range .CommitGroups -}}
+### {{ .Title }}
+{{ range .Commits -}}
+- {{ if .Scope }}**{{ .Scope }}:** {{ end }}{{ .Subject }}
+{{ end }}
+{{ end -}}
+
+{{- if .RevertCommits -}}
+### Reverts
+{{ range .RevertCommits -}}
+- {{ .Revert.Header }}
+{{ end }}
+{{ end -}}
+
+{{- if .MergeCommits -}}
+### Pull Requests
+{{ range .MergeCommits -}}
+- {{ .Header }}
+{{ end }}
+{{ end -}}
+
+{{- if .NoteGroups -}}
+{{ range .NoteGroups -}}
+### {{ .Title }}
+{{ range .Notes }}
+{{ .Body }}
+{{ end }}
+{{ end -}}
+{{ end -}}
+{{ end -}}
+
+{{- if .Versions }}
+[Unreleased]: {{ .Info.RepositoryURL }}/compare/{{ $latest := index .Versions 0 }}{{ $latest.Tag.Name }}...HEAD
+{{ range .Versions -}}
+{{ if .Tag.Previous -}}
+[{{ .Tag.Name }}]: {{ $.Info.RepositoryURL }}/compare/{{ .Tag.Previous.Name }}...{{ .Tag.Name }}
+{{ end -}}
+{{ end -}}
+{{ end -}}

.chglog/config.yml

@@ -0,0 +1,28 @@
+style: github
+template: CHANGELOG.tpl.md
+info:
+  title: CHANGELOG
+  repository_url: https://github.com/teloscube/rdecaf
+options:
+  commits:
+    # filters:
+    #   Type:
+    #     - feat
+    #     - fix
+    #     - perf
+    #     - refactor
+  commit_groups:
+    # title_maps:
+    #   feat: Features
+    #   fix: Bug Fixes
+    #   perf: Performance Improvements
+    #   refactor: Code Refactoring
+  header:
+    pattern: "^(\\w*)(?:\\(([\\w\\$\\.\\-\\*\\s]*)\\))?\\:\\s(.*)$"
+    pattern_maps:
+      - Type
+      - Scope
+      - Subject
+  notes:
+    keywords:
+      - BREAKING CHANGE

NEWS.md

@@ -0,0 +1,41 @@
+<a name="unreleased"></a>
+## [Unreleased]
+
+### Chore
+- prefix all source files with depr_
+- update LICENSE
+- review DecafClient implementation
+- update DESCRIPTION
+- **build:** attend check notice
+- **build:** bump roxygen2 version
+- **dev:** configure linter
+- **dev:** add Nix shell
+- **dev:** add lintr configuration
+- **docs:** revisit the documentation of DecafClient class
+- **docs:** regenerate R documentation files
+- **docs:** start tutorial document
+
+### Feat
+- add bare DECAF HTTP client
+
+
+<a name="0.0.5"></a>
+## [0.0.5] - 2019-05-08
+
+<a name="0.0.4"></a>
+## [0.0.4] - 2018-03-13
+
+<a name="0.0.3"></a>
+## [0.0.3] - 2018-03-06
+
+<a name="0.0.2"></a>
+## [0.0.2] - 2017-07-10
+
+<a name="0.0.1"></a>
+## 0.0.1 - 2017-03-19
+
+[Unreleased]: https://github.com/teloscube/rdecaf/compare/0.0.5...HEAD
+[0.0.5]: https://github.com/teloscube/rdecaf/compare/0.0.4...0.0.5
+[0.0.4]: https://github.com/teloscube/rdecaf/compare/0.0.3...0.0.4
+[0.0.3]: https://github.com/teloscube/rdecaf/compare/0.0.2...0.0.3
+[0.0.2]: https://github.com/teloscube/rdecaf/compare/0.0.1...0.0.2

shell.nix

@@ -23,5 +23,7 @@ in
 mkShell {
   buildInputs = [
     thisR
+
+    pkgs.git-chglog
   ];
 }