refactor: move the subcommands to internal

Move the subcommands and FlagSets to a new internal package.

internal/cmd/create.go

@@ -1,4 +1,4 @@
-package main
+package cmd
 
 import (
 	"encoding/json"

internal/cmd/generate.go

@@ -1,6 +1,7 @@
-package main
+package cmd
 
 import (
+	"embed"
 	"flag"
 	"fmt"
 	"io"
@@ -15,6 +16,9 @@ import (
 	tf "codeflow.dananglin.me.uk/apollo/spruce/internal/templateFuncs"
 )
 
+//go:embed templates/tex/*
+var templates embed.FS
+
 type GenerateCommand struct {
 	*flag.FlagSet
 	input             string

internal/cmd/version.go

@@ -1,4 +1,4 @@
-package main
+package cmd
 
 import (
 	"flag"
@@ -7,19 +7,20 @@ import (
 
 type VersionCommand struct {
 	*flag.FlagSet
-	fullVersion bool
-}
-
-var (
+	fullVersion   bool
 	binaryVersion string
 	buildTime     string
 	goVersion     string
 	gitCommit     string
-)
+}
 
-func NewVersionCommand() *VersionCommand {
+func NewVersionCommand(binaryVersion, buildTime, goVersion, gitCommit string) *VersionCommand {
 	vc := VersionCommand{
-		FlagSet: flag.NewFlagSet("version", flag.ExitOnError),
+		FlagSet:       flag.NewFlagSet("version", flag.ExitOnError),
+		binaryVersion: binaryVersion,
+		buildTime:     buildTime,
+		goVersion:     goVersion,
+		gitCommit:     gitCommit,
 	}
 
 	vc.BoolVar(&vc.fullVersion, "full", false, "prints the full version")
@@ -37,9 +38,9 @@ func (v *VersionCommand) Run() error {
   Build date: %s
 `
 
-		version = fmt.Sprintf(fullVersionFmt, binaryVersion, gitCommit, goVersion, buildTime)
+		version = fmt.Sprintf(fullVersionFmt, v.binaryVersion, v.gitCommit, v.goVersion, v.buildTime)
 	} else {
-		version = binaryVersion + "\n"
+		version = v.binaryVersion + "\n"
 	}
 
 	fmt.Print(version)

main.go

@@ -1,9 +1,10 @@
 package main
 
 import (
-	"embed"
 	"log"
 	"os"
+
+	"codeflow.dananglin.me.uk/apollo/spruce/internal/cmd"
 )
 
 type Runner interface {
@@ -12,14 +13,23 @@ type Runner interface {
 	Run() error
 }
 
-//go:embed templates/tex/*
-var templates embed.FS
+var (
+	binaryVersion string
+	buildTime     string
+	goVersion     string
+	gitCommit     string
+)
 
 func main() {
 	commandMap := map[string]Runner{
-		"version":  NewVersionCommand(),
-		"generate": NewGenerateCommand(),
-		"create":   NewCreateCommand(),
+		"version": cmd.NewVersionCommand(
+			binaryVersion,
+			buildTime,
+			goVersion,
+			gitCommit,
+		),
+		"generate": cmd.NewGenerateCommand(),
+		"create":   cmd.NewCreateCommand(),
 	}
 
 	subcommand := os.Args[1]