From da1e82c43bde003c3e11f858e4d23f6c21b61d7c Mon Sep 17 00:00:00 2001
From: Ivaylo Novakov <inovakov@gmail.com>
Date: Mon, 29 Apr 2024 10:46:26 +0200
Subject: [PATCH 1/3] Add --version command.

---
 justfile | 10 ++++++++--
 main.go  | 14 ++++++++++++++
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/justfile b/justfile
index af52fa3..377cc80 100644
--- a/justfile
+++ b/justfile
@@ -1,5 +1,11 @@
 # https://github.com/casey/just
 
+build:
+	goreleaser build --clean
+
+build version commitHash:
+	go build -ldflags "-X main.version={{version}} -X main.commit={{commitHash}}" .
+
 release version:
 	@[[ "{{version}}" =~ ^v[0-9]+\.[0-9]+\.[0-9]+$ ]] # ensure semantic versioning
 	@echo "Creating a release for version {{version}}:"
@@ -7,5 +13,5 @@ release version:
 	git push origin {{version}}
 	goreleaser release --clean
 
- sign-last-commit:
- 	git commit --amend --no-edit -S
+sign-last-commit:
+	git commit --amend --no-edit -S
diff --git a/main.go b/main.go
index 0f87a0c..3b54e08 100644
--- a/main.go
+++ b/main.go
@@ -22,6 +22,12 @@ const (
 	defaultLineLengthLimit = 100 * 1024 * 1024 // 100 MiB
 )
 
+var (
+	// These variables are set at build time by GoReleaser. See https://goreleaser.com/cookbooks/using-main.version/
+	version = "dev"
+	commit  = "none"
+)
+
 // readFile opens the given file for reading and returns a reader and a closing function.
 func readFile(path string, lineLimit int) (r *bufio.Reader, closeFn func() error, err error) {
 	if path == "" {
@@ -104,11 +110,19 @@ func main() {
 	var filePath string
 	var trim bool
 	var lineLengthLimit int
+	var versionFlag bool
 	flag.StringVar(&filePath, "f", "", "path to the file to process")
 	flag.BoolVar(&trim, "t", false, "trim whitespace from each line (default false)")
 	flag.IntVar(&lineLengthLimit, "ll", defaultLineLengthLimit, "limit the length of each line being processed, ignoring any data beyond that length (values under 16 are ignored)")
+	flag.BoolVar(&versionFlag, "version", false, "print the version")
 	flag.Parse()
 
+	// Print the version and exit.
+	if versionFlag {
+		fmt.Println(version, commit)
+		return
+	}
+
 	reader, closeFn, err := readFile(filePath, lineLengthLimit)
 	if err != nil {
 		log.Fatalf("Failed to read from file '%s'. Error: %s\n", filePath, err.Error())

From 6d54ab3852a50cd783bd111a7c0dbcf2c0b88841 Mon Sep 17 00:00:00 2001
From: Ivaylo Novakov <inovakov@gmail.com>
Date: Mon, 29 Apr 2024 11:05:36 +0200
Subject: [PATCH 2/3] Update GoReleaser.

---
 .goreleaser.yaml | 6 +-----
 .tool-versions   | 2 ++
 justfile         | 4 ++--
 3 files changed, 5 insertions(+), 7 deletions(-)
 create mode 100644 .tool-versions

diff --git a/.goreleaser.yaml b/.goreleaser.yaml
index eecc0df..614cd09 100644
--- a/.goreleaser.yaml
+++ b/.goreleaser.yaml
@@ -19,14 +19,10 @@ changelog:
 
 brews:
     -   name: unique
-        alternative_names:
-            - unique@{{ .Version }}
-            - unique@{{ .Major }}.{{ .Minor }}
-            - unique@{{ .Major }}
         description: "Outputs the unique lines of its input"
         homepage: "https://github.com/ro-tex/unique"
         license: "MIT"
-        folder: Formula
+        directory: Formula
         url_template: "https://github.com/ro-tex/unique/releases/download/{{ .Tag }}/{{ .ArtifactName }}"
         commit_author:
             name: goreleaserbot
diff --git a/.tool-versions b/.tool-versions
new file mode 100644
index 0000000..bfa1c23
--- /dev/null
+++ b/.tool-versions
@@ -0,0 +1,2 @@
+golang 1.22.2
+goreleaser 1.25.1
diff --git a/justfile b/justfile
index 377cc80..d8a909b 100644
--- a/justfile
+++ b/justfile
@@ -1,9 +1,9 @@
 # https://github.com/casey/just
 
 build:
-	goreleaser build --clean
+	goreleaser build --clean --snapshot
 
-build version commitHash:
+buildWithVersion version commitHash:
 	go build -ldflags "-X main.version={{version}} -X main.commit={{commitHash}}" .
 
 release version:

From 0bc11af25e8d3dd380aaf6d93af8e0d38ca6423a Mon Sep 17 00:00:00 2001
From: Ivaylo Novakov <inovakov@gmail.com>
Date: Mon, 29 Apr 2024 11:08:43 +0200
Subject: [PATCH 3/3] Update Changelog.

---
 CHANGELOG.md | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 708a061..beb799f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+
+- Add `--version` command that outputs version and commit hash.
+
 ### Changed
 
 - Switched to using v2 of xxhash library.