diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..485dee6
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1 @@
+.idea
diff --git a/go.mod b/go.mod
new file mode 100644
index 0000000..1ed6056
--- /dev/null
+++ b/go.mod
@@ -0,0 +1,13 @@
+module github.com/imrajdas/diffr
+
+go 1.20
+
+require (
+ github.com/pmezard/go-difflib v1.0.0
+ github.com/spf13/cobra v1.7.0
+)
+
+require (
+ github.com/inconshreveable/mousetrap v1.1.0 // indirect
+ github.com/spf13/pflag v1.0.5 // indirect
+)
diff --git a/go.sum b/go.sum
new file mode 100644
index 0000000..b015290
--- /dev/null
+++ b/go.sum
@@ -0,0 +1,12 @@
+github.com/cpuguy83/go-md2man/v2 v2.0.2/go.mod h1:tgQtvFlXSQOSOSIRvRPT7W67SCa46tRHOmNcaadrF8o=
+github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
+github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
+github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
+github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
+github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
+github.com/spf13/cobra v1.7.0 h1:hyqWnYt1ZQShIddO5kBpj3vu05/++x6tJ6dg8EC572I=
+github.com/spf13/cobra v1.7.0/go.mod h1:uLxZILRyS/50WlhOIKD7W6V5bgeIt+4sICxh6uRMrb0=
+github.com/spf13/pflag v1.0.5 h1:iy+VFUOCP1a+8yFto/drg2CJ5u0yRoB7fZw3DKv/JXA=
+github.com/spf13/pflag v1.0.5/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
+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=
diff --git a/main.go b/main.go
new file mode 100644
index 0000000..04bb25b
--- /dev/null
+++ b/main.go
@@ -0,0 +1,9 @@
+package main
+
+import (
+ "github.com/imrajdas/diffr/pkg/cmd/root"
+)
+
+func main() {
+ root.Execute()
+}
diff --git a/pkg/cmd/root/root.go b/pkg/cmd/root/root.go
new file mode 100644
index 0000000..eba1901
--- /dev/null
+++ b/pkg/cmd/root/root.go
@@ -0,0 +1,28 @@
+package root
+
+import (
+ "github.com/imrajdas/diffr/pkg/cmd/version"
+ "github.com/imrajdas/diffr/pkg/diffr"
+ "github.com/spf13/cobra"
+)
+
+var rootCmd = &cobra.Command{
+ Use: "diffr [dir1] [dir2]",
+ Example: "diffr /path/to/dir1 /path/to/dir2",
+ Short: "A web-based content difference analyzer",
+ Long: `A web-based tool to compare content differences between two directories ` + "\n" + `Find more information at: https://github.com/imrajdas/diffr`,
+ Args: cobra.ExactArgs(2),
+ Run: diffr.RunWebServer,
+}
+
+func Execute() {
+ cobra.CheckErr(rootCmd.Execute())
+}
+
+func init() {
+ rootCmd.Flags().IntVarP(&diffr.Port, "port", "p", 8080, "Set the port for the web server to listen on, default is 8080")
+ rootCmd.Flags().StringVarP(&diffr.Address, "address", "a", "http://localhost", "Set the address for the web server to listen on, default is http://localhost")
+
+ rootCmd.CompletionOptions.DisableDefaultCmd = true
+ rootCmd.AddCommand(version.VersionCmd)
+}
diff --git a/pkg/cmd/version/version.go b/pkg/cmd/version/version.go
new file mode 100644
index 0000000..a4c60d7
--- /dev/null
+++ b/pkg/cmd/version/version.go
@@ -0,0 +1,16 @@
+package version
+
+import (
+ "os"
+
+ "github.com/spf13/cobra"
+)
+
+var VersionCmd = &cobra.Command{
+ Use: "version",
+ Short: "Displays the version of diffr",
+ Long: ``,
+ Run: func(cmd *cobra.Command, args []string) {
+ cmd.Printf("Diffr Version: %s", os.Getenv("VERSION"))
+ },
+}
diff --git a/pkg/diffr/config.go b/pkg/diffr/config.go
new file mode 100644
index 0000000..73cca08
--- /dev/null
+++ b/pkg/diffr/config.go
@@ -0,0 +1,6 @@
+package diffr
+
+var (
+ Port int
+ Address string
+)
diff --git a/pkg/diffr/diff.go b/pkg/diffr/diff.go
new file mode 100644
index 0000000..3332fff
--- /dev/null
+++ b/pkg/diffr/diff.go
@@ -0,0 +1,87 @@
+package diffr
+
+import (
+ "fmt"
+ "io/ioutil"
+ "os"
+ "path/filepath"
+ "sync"
+
+ "github.com/pmezard/go-difflib/difflib"
+)
+
+func compareFiles(file1, file2 string) (string, error) {
+ content1, err := ioutil.ReadFile(file1)
+ if err != nil {
+ return "", err
+ }
+
+ content2, err := ioutil.ReadFile(file2)
+ if err != nil {
+ return "", err
+ }
+
+ diff := difflib.UnifiedDiff{
+ A: difflib.SplitLines(string(content1)),
+ B: difflib.SplitLines(string(content2)),
+ FromFile: file1,
+ ToFile: file2,
+ Context: 3,
+ }
+
+ diffs, err := difflib.GetUnifiedDiffString(diff)
+ if err != nil {
+ return "", err
+ }
+
+ return diffs, nil
+}
+
+func CompareDirectories(dir1, dir2 string, diffChan chan<- string, errorChan chan<- error, wg *sync.WaitGroup) {
+ defer wg.Done()
+
+ filepath.Walk(dir1, func(path1 string, info os.FileInfo, err error) error {
+ if err != nil {
+ errorChan <- fmt.Errorf("error accessing %s: %s", path1, err)
+ return nil
+ }
+
+ relPath, err := filepath.Rel(dir1, path1)
+ if err != nil {
+ errorChan <- fmt.Errorf("error getting relative path of %s: %s", path1, err)
+ return nil
+ }
+
+ path2 := filepath.Join(dir2, relPath)
+
+ if info.IsDir() {
+ return nil
+ }
+
+ if _, err := os.Stat(path2); err == nil {
+ diff, err := compareFiles(path1, path2)
+ if err != nil {
+ errorChan <- fmt.Errorf("error comparing files %s and %s: %s", path1, path2, err)
+ return nil
+ }
+
+ if diff != "" {
+ diffChan <- fmt.Sprintf("Differences in file: %s\n%s", relPath, diff)
+ }
+ } else if os.IsNotExist(err) {
+ diff, err := compareFiles(path1, "/dev/null")
+ if err != nil {
+ errorChan <- fmt.Errorf("error comparing files %s and /dev/null: %s", path1, err)
+ return nil
+ }
+
+ if diff != "" {
+ diffChan <- fmt.Sprintf("Differences in file: %s (present in %s but not in %s)\n%s", relPath, dir1, dir2, diff)
+ }
+ } else {
+ errorChan <- fmt.Errorf("error accessing %s: %s", path2, err)
+ }
+
+ return nil
+ })
+}
diff --git a/pkg/diffr/handler.go b/pkg/diffr/handler.go
new file mode 100644
index 0000000..04bee4d
--- /dev/null
+++ b/pkg/diffr/handler.go
@@ -0,0 +1,134 @@
+package diffr
+
+import (
+ "fmt"
+ "html/template"
+ "net/http"
+ "os"
+ "os/exec"
+ "os/signal"
+ "runtime"
+ "sync"
+ "syscall"
+
+ "github.com/spf13/cobra"
+)
+
+var (
+ dir1 string
+ dir2 string
+)
+
+func openBrowser(url string) error {
+ var cmd *exec.Cmd
+
+ switch runtime.GOOS {
+ case "darwin":
+ cmd = exec.Command("open", url)
+ case "linux":
+ cmd = exec.Command("xdg-open", url)
+ case "windows":
+ cmd = exec.Command("cmd", "/c", "start", url)
+ default:
+ return fmt.Errorf("unsupported platform")
+ }
+
+ return cmd.Start()
+}
+
+func RunWebServer(cmd *cobra.Command, args []string) {
+ if len(args) != 2 {
+ fmt.Errorf("Error: Usage: \n diffr /path/to/dir1 /path/to/dir2")
+ return
+ }
+
+ dir1 = args[0]
+ dir2 = args[1]
+
+ serverURL := fmt.Sprintf("%s:%d", Address, Port)
+
+ http.HandleFunc("/", handler)
+ http.Handle("/static/", http.StripPrefix("/static/", http.FileServer(http.Dir("static"))))
+
+ server := &http.Server{Addr: fmt.Sprintf(":%d", Port)}
+
+ // Channel to receive signals (e.g., interrupt or termination)
+ signalCh := make(chan os.Signal, 1)
+ signal.Notify(signalCh, os.Interrupt, syscall.SIGTERM)
+
+ go func() {
+ fmt.Printf("Server started at %s\n", serverURL)
+ err := server.ListenAndServe()
+ if err != nil && err != http.ErrServerClosed {
+ fmt.Println("Error starting server:", err)
+ os.Exit(1)
+ }
+ }()
+
+ fmt.Println("Opening browser...")
+ err := openBrowser(serverURL)
+ if err != nil {
+ fmt.Println("Error opening browser:", err)
+ }
+
+ // Wait for a termination signal
+ <-signalCh
+
+ fmt.Println("Shutting down server...")
+ err = server.Shutdown(nil)
+ if err != nil {
+ fmt.Println("Error shutting down server:", err)
+ }
+}
+
+type PageData struct {
+ Title string
+ Diff string
+}
+
+func handler(w http.ResponseWriter, r *http.Request) {
+ var (
+ wg sync.WaitGroup
+ finalStr = ""
+ diffChan = make(chan string)
+ errorChan = make(chan error)
+ )
+
+ go func() {
+ for diff := range diffChan {
+ finalStr += diff
+ }
+ }()
+
+ go func() {
+ for err := range errorChan {
+ fmt.Printf("error: %v", err)
+ }
+ }()
+
+ wg.Add(1)
+ go CompareDirectories(dir1, dir2, diffChan, errorChan, &wg)
+ wg.Wait()
+
+ close(diffChan)
+ close(errorChan)
+
+ tmpl, err := template.ParseFiles("static/templates/template.html")
+ if err != nil {
+ fmt.Printf("error: %v", err)
+ http.Error(w, err.Error(), http.StatusInternalServerError)
+ return
+ }
+
+ data := PageData{
+ Title: "Diffr - A web-based content difference analyzer",
+ Diff: finalStr,
+ }
+
+ // Execute the template with the data and write the output to the response writer
+ err = tmpl.Execute(w, data)
+ if err != nil {
+ fmt.Printf("error: %v", err)
+ http.Error(w, err.Error(), http.StatusInternalServerError)
+ }
+}
diff --git a/static/css/style.css b/static/css/style.css
new file mode 100644
index 0000000..e5e30bb
--- /dev/null
+++ b/static/css/style.css
@@ -0,0 +1,17 @@
+.navbar {
+ background-color: #010b18; /* Dark blue color */
+}
+.navbar-brand {
+ color: #fff;
+ font-weight: bold;
+}
+.github-star {
+ font-size: 24px;
+ color: #fff;
+ margin-right: 20px;
+}
+
+#myDiffElement {
+ margin-left: 10%;
+ margin-right: 10%;
+}
diff --git a/static/js/script.js b/static/js/script.js
new file mode 100644
index 0000000..ee0d30c
--- /dev/null
+++ b/static/js/script.js
@@ -0,0 +1,27 @@
+var diffString = document.getElementById("diff-data").getAttribute("data-diff");
+document.addEventListener('DOMContentLoaded', function () {
+ var targetElement = document.getElementById('myDiffElement');
+ var configuration = {
+ drawFileList: true,
+ fileListToggle: true,
+ fileListStartVisible: true,
+ fileContentToggle: true,
+ matching: 'lines',
+ outputFormat: 'side-by-side',
+ synchronisedScroll: true,
+ highlight: true,
+ highlightLanguages: true,
+ renderNothingWhenEmpty: false,
+ };
+ var diff2htmlUi = new Diff2HtmlUI(targetElement, diffString, configuration);
+ diff2htmlUi.draw();
+ diff2htmlUi.highlightCode();
+
+ // Dark mode toggle functionality
+ const darkModeToggle = document.getElementById('darkModeToggle');
+ const body = document.body;
+
+ darkModeToggle.addEventListener('click', () => {
+ body.classList.toggle('dark-mode');
+ });
+});
diff --git a/static/templates/template.html b/static/templates/template.html
new file mode 100644
index 0000000..1544f26
--- /dev/null
+++ b/static/templates/template.html
@@ -0,0 +1,40 @@
+
+
+
+ {{.Title}}
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+