feat: cli print names of unformatted files (#9)

Author: joshdk

.golangci.yaml

@@ -38,6 +38,9 @@ linters:
         - fmt.Fprintf
         - fmt.Fprintln
 
+    gomoddirectives:
+      replace-local: true
+
     goheader:
       template: |-
         Copyright Josh Komoroske. All rights reserved.

cmd/command.go

@@ -7,13 +7,16 @@
 package cmd
 
 import (
+	"bytes"
 	"fmt"
 	"os"
 	"path/filepath"
 	"strings"
 
 	"github.com/joshdk/buildversion"
 	"github.com/spf13/cobra"
+
+	"github.com/joshdk/modfmt/pkg/modfmt"
 )
 
 // Command returns a complete command line handler for modfmt.
@@ -47,7 +50,22 @@ func Command() *cobra.Command {
 		}
 
 		for _, filename := range filenames {
-			fmt.Println(filename)
+			// Read the original file.
+			original, err := os.ReadFile(filename)
+			if err != nil {
+				return err
+			}
+
+			// Format the file.
+			formatted, err := modfmt.Format(filename, original)
+			if err != nil {
+				return err
+			}
+
+			// Did formatting change the file or was it already formatted?
+			if !bytes.Equal(original, formatted) {
+				fmt.Println(filename)
+			}
 		}
 
 		return nil

go.mod

@@ -4,10 +4,16 @@ go 1.23.0
 
 require (
 	github.com/joshdk/buildversion v0.1.0
+	github.com/joshdk/modfmt/pkg/modfmt v0.0.0-00010101000000-000000000000
 	github.com/spf13/cobra v1.10.1
 )
 
 require (
 	github.com/inconshreveable/mousetrap v1.1.0 // indirect
 	github.com/spf13/pflag v1.0.9 // indirect
+	golang.org/x/mod v0.27.0 // indirect
+)
+
+replace (
+	github.com/joshdk/modfmt/pkg/modfmt => ./pkg/modfmt
 )

go.sum

@@ -8,5 +8,7 @@ github.com/spf13/cobra v1.10.1 h1:lJeBwCfmrnXthfAupyUTzJ/J4Nc1RsHC/mSRU2dll/s=
 github.com/spf13/cobra v1.10.1/go.mod h1:7SmJGaTHFVBY0jW4NXGluQoLvhqFQM+6XSKD+P4XaB0=
 github.com/spf13/pflag v1.0.9 h1:9exaQaMOCwffKiiiYk6/BndUBv+iRViNW+4lEMi0PvY=
 github.com/spf13/pflag v1.0.9/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+golang.org/x/mod v0.27.0 h1:kb+q2PyFnEADO2IEF935ehFUXlWiNjJWtRNgBLSfbxQ=
+golang.org/x/mod v0.27.0/go.mod h1:rWI627Fq0DEoudcK+MBkNkCe0EetEaDSwJJkCcjpazc=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=