Fileglob parsing fixes (#1485)

* Update doublestar module to version 1.2.2.

* Add absolute path for each element in list.

* Remove doublestar test and update vendore module version.

go.mod

@@ -5,7 +5,7 @@ go 1.13
 require (
 	github.com/Microsoft/go-winio v0.4.12 // indirect
 	github.com/blang/semver v3.5.1+incompatible // indirect
-	github.com/bmatcuk/doublestar v1.1.1
+	github.com/bmatcuk/doublestar v1.2.2
 	github.com/containerd/containerd v1.3.2 // indirect
 	github.com/containerd/fifo v0.0.0-20190226154929-a9fb20d87448 // indirect
 	github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e

go.sum

@@ -94,8 +94,8 @@ github.com/bitly/go-hostpool v0.0.0-20171023180738-a3a6125de932/go.mod h1:NOuUCS
 github.com/blang/semver v3.5.0+incompatible/go.mod h1:kRBLl5iJ+tD4TcOOxsy/0fnwebNt5EWlYSAyrTnjyyk=
 github.com/blang/semver v3.5.1+incompatible h1:cQNTCjp13qL8KC3Nbxr/y2Bqb63oX6wdnnjpJbkM4JQ=
 github.com/blang/semver v3.5.1+incompatible/go.mod h1:kRBLl5iJ+tD4TcOOxsy/0fnwebNt5EWlYSAyrTnjyyk=
-github.com/bmatcuk/doublestar v1.1.1 h1:YroD6BJCZBYx06yYFEWvUuKVWQn3vLLQAVmDmvTSaiQ=
-github.com/bmatcuk/doublestar v1.1.1/go.mod h1:UD6OnuiIn0yFxxA2le/rnRU1G4RaI4UvFv1sNto9p6w=
+github.com/bmatcuk/doublestar v1.2.2 h1:oC24CykoSAB8zd7XgruHo33E0cHJf/WhQA/7BeXj+x0=
+github.com/bmatcuk/doublestar v1.2.2/go.mod h1:wiQtGV+rzVYxB7WIlirSN++5HPtPlXEo9MEoZQC/PmE=
 github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869 h1:DDGfHa7BWjL4YnC6+E63dPcxHo2sUxDIu8g3QgEJdRY=
 github.com/bmizerany/assert v0.0.0-20160611221934-b7ed37b82869/go.mod h1:Ekp36dRnpXw/yCqJaO+ZrUyxD+3VXMFFr56k5XYrpB4=
 github.com/bradfitz/gomemcache v0.0.0-20190329173943-551aad21a668 h1:U/lr3Dgy4WK+hNk4tyD+nuGjpVLPEHuJSFXMw11/HPA=

pkg/promtail/targets/filetarget.go

@@ -195,18 +195,23 @@ func (t *FileTarget) run() {
 
 func (t *FileTarget) sync() error {
 
-	// Find list of directories to add to watcher.
-	path, err := filepath.Abs(t.path)
-	if err != nil {
-		return errors.Wrap(err, "filetarget.sync.filepath.Abs")
-	}
-
 	// Gets current list of files to tail.
-	matches, err := doublestar.Glob(path)
+	matches, err := doublestar.Glob(t.path)
 	if err != nil {
 		return errors.Wrap(err, "filetarget.sync.filepath.Glob")
 	}
 
+	// Gets absolute path for each pattern.
+	for i := 0; i < len(matches); i++ {
+		if !filepath.IsAbs(matches[i]) {
+			path, err := filepath.Abs(matches[i])
+			if err != nil {
+				return errors.Wrap(err, "filetarget.sync.filepath.Abs")
+			}
+			matches[i] = path
+		}
+	}
+
 	// Record the size of all the files matched by the Glob pattern.
 	t.reportSize(matches)