Follow symlink if required (#137)

* Follow symlink is required

* update air_example.toml, ignore symlink for files

Co-authored-by: canzheng <[email protected]>

Author: zhengcan

air_example.toml

@@ -24,6 +24,8 @@ exclude_file = []
 exclude_regex = []
 # Exclude unchanged files.
 exclude_unchanged = true
+# Follow symlink for directories
+follow_symlink = true
 # This log file places in your tmp_dir.
 log = "air.log"
 # It's not necessary to trigger build each time file changes if it's too frequent.

runner/config.go

@@ -39,6 +39,7 @@ type cfgBuild struct {
 	ExcludeFile      []string      `toml:"exclude_file"`
 	ExcludeRegex     []string      `toml:"exclude_regex"`
 	ExcludeUnchanged bool          `toml:"exclude_unchanged"`
+	FollowSymlink    bool          `toml:"follow_symlink"`
 	Delay            int           `toml:"delay"`
 	StopOnError      bool          `toml:"stop_on_error"`
 	SendInterrupt    bool          `toml:"send_interrupt"`

runner/engine.go

@@ -143,6 +143,25 @@ func (e *Engine) cacheFileChecksums(root string) error {
 				e.watcherDebug("!exclude checksum %s", e.config.rel(path))
 				return filepath.SkipDir
 			}
+
+			// Follow symbolic link
+			if e.config.Build.FollowSymlink && (info.Mode()&os.ModeSymlink) > 0 {
+				link, err := filepath.EvalSymlinks(path)
+				if err != nil {
+					return err
+				}
+				linkInfo, err := os.Stat(link)
+				if err != nil {
+					return err
+				}
+				if linkInfo.IsDir() {
+					err = e.watchDir(link)
+					if err != nil {
+						return err
+					}
+				}
+				return nil
+			}
 		}
 
 		if e.isExcludeFile(path) || !e.isIncludeExt(path) {