support symlink resolution during file search

Closes #3

src/scribe/filecontent.go

@@ -235,6 +235,17 @@ func (s *simpleFileLocator) locate(target string, useRegexp bool) error {
 	return s.locateInner(target, useRegexp, "")
 }
 
+func (s *simpleFileLocator) symFollowIsRegular(path string) (bool, error) {
+	fi, err := os.Stat(path)
+	if err != nil {
+		return false, err
+	}
+	if fi.Mode().IsRegular() {
+		return true, nil
+	}
+	return false, nil
+}
+
 func (s *simpleFileLocator) locateInner(target string, useRegexp bool, path string) error {
 	var (
 		spath string
@@ -288,6 +299,22 @@ func (s *simpleFileLocator) locateInner(target string, useRegexp bool, path stri
 					s.matches = append(s.matches, fname)
 				}
 			}
+		} else if (x.Mode() & os.ModeSymlink) > 0 {
+			isregsym, err := s.symFollowIsRegular(fname)
+			if err != nil {
+				return err
+			}
+			if isregsym {
+				if !useRegexp {
+					if x.Name() == target {
+						s.matches = append(s.matches, fname)
+					}
+				} else {
+					if re.MatchString(x.Name()) {
+						s.matches = append(s.matches, fname)
+					}
+				}
+			}
 		}
 	}
 	return nil

test/filecontent/data/testfile2

@@ -0,0 +1 @@
+testfile1

test/filecontent/test-template.json

@@ -49,6 +49,15 @@
 		}
 	},
 
+	{
+		"object": "testfile2-version",
+		"filecontent": {
+			"path": "${root}",
+			"file": ".*file2",
+			"expression": "^Version = (\\S+)"
+		}
+	},
+
 	{
 		"object": "anyfile",
 		"filecontent": {
@@ -134,6 +143,17 @@
 		}
 	},
 
+	{
+		"test": "filecontent4",
+		"description": "version is ok",
+		"expectedresult": false,
+		"object": "testfile2-version",
+		"evr": {
+			"operation": "<",
+			"value": "0.4z"
+		}
+	},
+
 	{
 		"test": "anyfile0",
 		"expectedresult": true,