From 87f06e30f87aab7dc94aab5620d18e0c43058839 Mon Sep 17 00:00:00 2001
From: Bryton Hall <email@bryton.io>
Date: Mon, 9 Jan 2023 02:59:50 -0500
Subject: [PATCH] add changelog for version source of truth

---
 .github/workflows/main.yml | 18 +++++++++++++++---
 CHANGELOG.md               | 14 ++++++++++++++
 CONTRIBUTING.md            |  5 +++++
 flake.nix                  |  5 +++--
 4 files changed, 37 insertions(+), 5 deletions(-)
 create mode 100644 CHANGELOG.md

diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index ce1ec76..6b3fefc 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -3,7 +3,7 @@ on:
   pull_request:
   push:
 jobs:
-  build:
+  main:
     runs-on: ubuntu-latest
     steps:
     - name: checkout
@@ -18,9 +18,21 @@ jobs:
       run: nix flake check
     - name: build
       run: nix build
+    - name: bump
+      id: bump
+      if: github.ref == 'refs/heads/main'
+      run: |
+        latest=$(git tag | sort -n | tail -1)
+        version=$(cat CHANGELOG.md | grep '^## \[[0-9]' | head -1 | cut -d "[" -f2 | cut -d "]" -f1)
+        if [[ "$version" != "$latest" ]]; then
+          git tag $version
+          git push --tags -o ci.skip
+          echo version=$version >> $GITHUB_OUTPUT
+        fi
     - name: release
       uses: softprops/action-gh-release@v1
-      if: startsWith(github.ref, 'refs/tags/') || github.ref == 'refs/heads/main'
+      if: steps.bump.outputs.version
       with:
-        prerelease: true # TODO: version things
+        prerelease: true # TODO: make conditional
         files: result/little-buddy*.bin
+        tag_name: ${{ steps.bump.outputs.version }}
diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..8b45160
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,14 @@
+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
+and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
+
+## [Unreleased]
+
+## [0.0.0] - 2023-01-09
+
+### Added
+
+- init from upstream SDK release on Pine64's wiki
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 1cfb2e3..59bb6ff 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -25,6 +25,11 @@ flashrom -p pony_spi:dev=/dev/ttyACM0 -w out/open_source/open_source.bin
 minicom -D /dev/ttyACM0
 ```
 
+## release
+
+Create a new release by moving the "Unreleased" section in [`CHANGELOG.md`](./CHANGELOG.md) to a new version.
+Once pushed the [`main.yml`](./.github/workflows/main.yml) workflow will create a new release.
+
 ## notes
 
 > **NOTE**: upstream wrote this; leaving until I better understand
diff --git a/flake.nix b/flake.nix
index 2c8e846..2b41496 100644
--- a/flake.nix
+++ b/flake.nix
@@ -16,7 +16,6 @@
         {
           packages.default = pkgs.stdenv.mkDerivation rec {
             name = "little-buddy";
-            version = "0.0.0"; # TODO: get version from tags?
             src = ./.;
             makeFlags = [
               # "-j"
@@ -32,8 +31,10 @@
               minicom
             ];
             installPhase = ''
+              version=$(cat CHANGELOG.md | grep '^## \[[0-9]' | head -1 | cut -d "[" -f2 | cut -d "]" -f1)
+
               mkdir -p $out
-              mv ./out/open_source/open_source.bin $out/${name}-${version}.bin
+              mv ./out/open_source/open_source.bin $out/${name}-$version.bin
             '';
           };
         });