refactor: write the github output in golang and support actions input…

… variables

.dockerignore

@@ -3,4 +3,4 @@
 .gitignore
 *md
 *yml
-semver
+semver-generator

Dockerfile

@@ -1,12 +1,12 @@
 FROM golang:1.22.3-alpine as builder
 
-COPY . /go/src/github.com/dokku/semver
-WORKDIR /go/src/github.com/dokku/semver
+COPY . /go/src/github.com/dokku/semver-generator
+WORKDIR /go/src/github.com/dokku/semver-generator
 RUN go build
 
 FROM alpine:3.19.1
 # hadolint ignore=DL3018
-RUN apk add --no-cache bash
-COPY --from=builder /go/src/github.com/dokku/semver/semver /usr/local/bin/semver
-ENTRYPOINT ["/usr/local/bin/semver"]
+COPY --from=builder /go/src/github.com/dokku/semver-generator/semver-generator /usr/local/bin/semver-generator
+COPY github-entrypoint /usr/local/bin/github-entrypoint
+ENTRYPOINT ["/usr/local/bin/semver-generator"]
 LABEL org.opencontainers.image.description "A tool for generating a semver version from an existing version and a desired bump level"

README.md

@@ -11,12 +11,14 @@ Github Action and golang binary for generating a semver version
 
 ```shell
 # build it
-docker build --progress plain -t semver .
+docker build --progress plain -t semver-generator .
 
 # run it with arguments
-docker run --rm semver --input 0.1.2 --bump patch
+docker run --rm semver-generator --input 0.1.2 --bump patch
 ```
 
+If executed in a Github Actions environment, a Github Output of `version` will be written.
+
 ## Releasing
 
 Run the `bump-version` Github Actions workflow with the appropriate `bump type`. A docker image will be generated and pushed into GHCR, while the built binaries will be attached to the Github Release associated with the generated tag.

action.yml

@@ -15,8 +15,8 @@ inputs:
 runs:
   using: "docker"
   image: "Dockerfile"
-  args:
-    - "--bump"
-    - ${{ inputs.bump }}
-    - "--input"
-    - ${{ inputs.input }}
+  entrypoint: "/usr/local/bin/github-entrypoint"
+
+outputs:
+  version:
+    description: "The computed version"

github-entrypoint

@@ -0,0 +1,3 @@
+#!/usr/bin/env sh
+
+/usr/local/bin/semver-generator --bump "$INPUT_BUMP" --input "$INPUT_VERSION"

go.mod

@@ -1,4 +1,4 @@
-module github.com/dokku/semver
+module github.com/dokku/semver-generator
 
 go 1.22.3
 

main.go

@@ -6,7 +6,7 @@ import (
 	"os"
 	"strings"
 
-	go_semver "github.com/coreos/go-semver/semver"
+	"github.com/coreos/go-semver/semver"
 	flag "github.com/spf13/pflag"
 )
 
@@ -43,7 +43,7 @@ func main() {
 		addPrefix = true
 	}
 
-	parsed, err := go_semver.NewVersion(*input)
+	parsed, err := semver.NewVersion(*input)
 	if err != nil {
 		slog.Error("Invalid version", "version", *input, "error", err.Error())
 		os.Exit(1)
@@ -76,7 +76,7 @@ func main() {
 		}
 		defer f.Close()
 
-		if _, err = f.WriteString(fmt.Sprintf("VERSION=%s", updatedVersion)); err != nil {
+		if _, err = f.WriteString(fmt.Sprintf("version=%s", updatedVersion)); err != nil {
 			slog.Error("Failed to write to file", "file", githubOutput, "error", err.Error())
 			os.Exit(1)
 		}