webtry: Check the result of os.Chdir().

experimental/webtry/webtry.go

 package main
 
 import (
         "bytes"
         "crypto/md5"
         "database/sql"
         "encoding/base64"
         "encoding/binary"
         "encoding/json"
         "flag"
@@ skipping 121 matching lines @@
                 ret = append(ret, fmt.Sprintf("#line %d", i+1))
                 ret = append(ret, line)
         }
         return strings.Join(ret, "\n")
 }
 
 func init() {
         rand.Seed(time.Now().UnixNano())
 
         // Change the current working directory to the directory of the executable.
-        var err error
         cwd, err := filepath.Abs(filepath.Dir(os.Args[0]))
         if err != nil {
                 log.Fatal(err)
         }
-        os.Chdir(cwd)
+        if err := os.Chdir(cwd); err != nil {
+                log.Fatal(err)
+        }
 
         codeTemplate = template.Must(template.ParseFiles(filepath.Join(cwd, "templates/template.cpp")))
         gypTemplate = template.Must(template.ParseFiles(filepath.Join(cwd, "templates/template.gyp")))
         indexTemplate = htemplate.Must(htemplate.ParseFiles(
                 filepath.Join(cwd, "templates/index.html"),
                 filepath.Join(cwd, "templates/titlebar.html"),
                 filepath.Join(cwd, "templates/sidebar.html"),
                 filepath.Join(cwd, "templates/content.html"),
                 filepath.Join(cwd, "templates/headercommon.html"),
                 filepath.Join(cwd, "templates/footercommon.html"),
@@ skipping 744 matching lines @@
         http.HandleFunc("/sources/", autogzip.HandleFunc(sourcesHandler))
 
         // Resources are served directly
         // TODO add support for caching/etags/gzip
         http.Handle("/res/", autogzip.Handle(http.FileServer(http.Dir("./"))))
 
         // TODO Break out /c/ as it's own handler.
         http.HandleFunc("/", autogzip.HandleFunc(mainHandler))
         log.Fatal(http.ListenAndServe(*port, nil))
 }