cli: Make profile build optional and move it to cli

Makefile

@@ -64,10 +64,12 @@ depgraph.svg:
 formats.svg:
 	dev/formats_dot.jq | dot -Tsvg -o formats.svg
 
+# make memprof ARGS=". test.mp3"
+# make cpuprof ARGS=". test.mp3"
 .PHONY: prof
 prof:
-	go build -o fq.prof main.go
-	CPUPROFILE=fq.cpu.prof MEMPROFILE=fq.mem.prof ./fq.prof "${ARGS}"
+	go build -tags profile -o fq.prof main.go
+	CPUPROFILE=fq.cpu.prof MEMPROFILE=fq.mem.prof ./fq.prof ${ARGS}
 .PHONY: memprof
 memprof: prof
 	go tool pprof -http :5555 fq.prof fq.mem.prof

internal/profile/profile.go

@@ -26,13 +26,8 @@ func Start(cpuProfilePath string, memProfilePath string) func() {
 			})
 		}
 	}
-
-	return func() {
-		for _, fn := range deferFns {
-			fn()
-		}
-
-		if memProfilePath != "" {
+	if memProfilePath != "" {
+		deferFns = append(deferFns, func() {
 			f, err := os.Create(memProfilePath)
 			if err != nil {
 				log.Fatal("could not create memory profile: ", err)
@@ -45,6 +40,12 @@ func Start(cpuProfilePath string, memProfilePath string) func() {
 					log.Fatal("could not close memory profile: ", err)
 				}
 			}
+		})
+	}
+
+	return func() {
+		for _, fn := range deferFns {
+			fn()
 		}
 	}
 }

main.go

@@ -9,7 +9,5 @@ import (
 var version = "dev"
 
 func main() {
-	defer cli.MaybeProfile()()
-	cli.MaybeLogFile()
 	cli.Main(registry.Default, version)
 }

pkg/cli/cli.go

@@ -13,17 +13,12 @@ import (
 	"path/filepath"
 
 	"github.com/wader/fq/format/registry"
-	"github.com/wader/fq/internal/profile"
 	"github.com/wader/fq/pkg/interp"
 
 	"github.com/wader/readline"
 )
 
-func MaybeProfile() func() {
-	return profile.Start(os.Getenv("CPUPROFILE"), os.Getenv("MEMPROFILE"))
-}
-
-func MaybeLogFile() {
+func maybeLogFile() {
 	// used during dev to redirect log to file, useful when debugging repl etc
 	if lf := os.Getenv("LOGFILE"); lf != "" {
 		if f, err := os.Create(lf); err == nil {
@@ -194,6 +189,9 @@ func (o *standardOS) Close() error {
 
 func Main(r *registry.Registry, version string) {
 	os.Exit(func() int {
+		defer maybeProfile()()
+		maybeLogFile()
+
 		sos := newStandardOS()
 		defer sos.Close()
 		i, err := interp.New(sos, r)

pkg/cli/noprofile.go

@@ -0,0 +1,5 @@
+//go:build !profile
+
+package cli
+
+func maybeProfile() func() { return func() {} }

pkg/cli/profile.go

@@ -0,0 +1,13 @@
+//go:build profile
+
+package cli
+
+import (
+	"os"
+
+	"github.com/wader/fq/internal/profile"
+)
+
+func maybeProfile() func() {
+	return profile.Start(os.Getenv("CPUPROFILE"), os.Getenv("MEMPROFILE"))
+}