From 52868d7aa8e15ca3623695fb509f280017b979d3 Mon Sep 17 00:00:00 2001
From: Dan Anglin <daangling@gmail.com>
Date: Wed, 8 Mar 2023 00:42:04 +0000
Subject: [PATCH] fix: add version and print with --version

Add a version variable that is printed to screen with the --version
flag.

Add a basic Makefile for building and installing spruce.
---
 Makefile | 21 +++++++++++++++++++++
 main.go  | 26 +++++++++++++++++++++-----
 2 files changed, 42 insertions(+), 5 deletions(-)
 create mode 100644 Makefile

diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..d1790d7
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,21 @@
+BINARY = spruce
+INSTALL_PREFIX ?= /usr/local
+CGO_ENABLED ?= 0
+GOOS ?= linux
+GOARCH ?= amd64
+VERSION = 0.1.0
+
+LDFLAGS = "-s -w -X main.version=$(VERSION) -X main.installPrefix=$(INSTALL_PREFIX)"
+
+$(BINARY):
+	go build -ldflags=$(LDFLAGS) -v -a -o $(BINARY)
+
+install: spruce
+	cp -f $(BINARY) $(INSTALL_PREFIX)/bin
+	chmod 0755 $(INSTALL_PREFIX)/bin/$(BINARY)
+
+uninstall:
+	rm -f $(INSTALL_PREFIX)/bin/$(BINARY)
+
+clean:
+	go clean
diff --git a/main.go b/main.go
index f5286d1..03e058f 100644
--- a/main.go
+++ b/main.go
@@ -19,15 +19,27 @@ import (
 //go:embed templates/tex/*
 var templates embed.FS
 
+var version string
+
 func main() {
-	var input, output string
-	var employmentHistory int
+	var (
+		input             string
+		output            string
+		employmentHistory int
+		printVersion      bool
+	)
 
 	flag.StringVar(&input, "input", "", "specify the CV JSON file that you want to input to the builder.")
 	flag.StringVar(&output, "output", "", "specify the name of the output CV file.")
 	flag.IntVar(&employmentHistory, "employment-history", 10, "show employment history within these number of years.")
+	flag.BoolVar(&printVersion, "version", false, "print the application version and exit.")
 	flag.Parse()
 
+	if printVersion {
+		Version()
+		os.Exit(0)
+	}
+
 	if err := run(input, output, employmentHistory); err != nil {
 		log.Fatalf("ERROR: %v", err)
 	}
@@ -79,7 +91,7 @@ func tex(input, tempDir string, historyLimit time.Time) (string, error) {
 		"notLastElement":   tf.NotLastElement,
 		"join":             tf.JoinSentences,
 		"durationToString": tf.FormatDuration,
-		"withinTimePeriod":  tf.WithinTimePeriod(historyLimit),
+		"withinTimePeriod": tf.WithinTimePeriod(historyLimit),
 	}
 
 	t := template.Must(template.New("cv.tmpl.tex").
@@ -114,14 +126,14 @@ func pdf(tempDir, texFile, output string) error {
 		output = "./cv.pdf"
 	}
 
-	if err := copy(filepath.Join(tempDir, "cv.pdf"), output); err != nil {
+	if err := copyfile(filepath.Join(tempDir, "cv.pdf"), output); err != nil {
 		return err
 	}
 
 	return nil
 }
 
-func copy(input, output string) error {
+func copyfile(input, output string) error {
 	inputFile, err := os.Open(input)
 	if err != nil {
 		return fmt.Errorf("unable to open %s; %w", input, err)
@@ -141,3 +153,7 @@ func copy(input, output string) error {
 
 	return nil
 }
+
+func Version() {
+	fmt.Printf("Spruce version %s\n", version)
+}