Add .gomplateignore support

Gopkg.toml

@@ -14,3 +14,7 @@
 [[constraint]]
   branch = "v2"
   name = "gopkg.in/hairyhenderson/yaml.v2"
+
+[[constraint]]
+  name = "github.com/zealic/xignore"
+  version = "0.3.2"

docs/content/usage.md

@@ -35,6 +35,8 @@ You can specify multiple `--file` and `--out` arguments. The same number of each
 
 For processing multiple templates in a directory you can use `--input-dir` and `--output-dir` together. In this case all files in input directory will be processed as templates and the resulting files stored in `--output-dir`. The output directory will be created if it does not exist and the directory structure of the input directory will be preserved.  
 
+You can use `.gomplateignore` ignore some files, have the similar behavior to the [.gitignore](https://git-scm.com/docs/gitignore) file.
+
 Example:
 
 ```bash
@@ -43,6 +45,13 @@ Example:
 gomplate --input-dir=templates --output-dir=config --datasource config=config.yaml
 ```
 
+### Ignorefile
+
+You can use ignore file `.gomplateignore` to ignore some files, have the similar behavior to the [.gitignore](https://git-scm.com/docs/gitignore) file.  
+Nested ignorefile are supported, you can use ignorefile on any sub directroy.
+
+Ignorefile only support `--input-dir` option.
+
 ### `--chmod`
 
 By default, output files are created with the same file mode (permissions) as input files. If desired, the `--chmod` option can be used to override this behaviour, and set the output file mode explicitly. This can be useful for creating executable scripts or ensuring write permissions.
@@ -63,6 +72,9 @@ This will stop all files in the example folder from being processed, as well as
 
 You can also chain the flag to build up a series of globs to be excluded.
 
+The `--exclude` option compatible [.gomplateignore](#ignorefile), exclude rules will effective after [.gomplateignore](#ignorefile).
+
+
 ### `--datasource`/`-d`
 
 Add a data source in `name=URL` form. Specify multiple times to add multiple sources. The data can then be used by the [`datasource`](../functions/data/#datasource) and [`include`](../functions/data/#include) functions.

template.go

@@ -14,8 +14,12 @@ import (
 	"github.com/pkg/errors"
 
 	"github.com/spf13/afero"
+	"github.com/zealic/xignore"
 )
 
+// Gomplateignore ignore file name, like .gitignore
+const Gomplateignore = ".gomplateignore"
+
 // for overriding in tests
 var stdin io.ReadCloser = os.Stdin
 var fs = afero.NewOsFs()
@@ -139,57 +143,57 @@ func processTemplates(templates []*tplate) ([]*tplate, error) {
 }
 
 // walkDir - given an input dir `dir` and an output dir `outDir`, and a list
-// of exclude globs (if any), walk the input directory and create a list of
+// of .gomplateignore and exclude globs (if any), walk the input directory and create a list of
 // tplate objects, and an error, if any.
 func walkDir(dir, outDir string, excludeGlob []string, mode os.FileMode, modeOverride bool) ([]*tplate, error) {
 	dir = filepath.Clean(dir)
 	outDir = filepath.Clean(outDir)
-	si, err := fs.Stat(dir)
-	if err != nil {
-		return nil, err
-	}
 
-	entries, err := afero.ReadDir(fs, dir)
+	dirStat, err := fs.Stat(dir)
 	if err != nil {
 		return nil, err
 	}
+	dirMode := dirStat.Mode()
 
-	if err = fs.MkdirAll(outDir, si.Mode()); err != nil {
-		return nil, err
-	}
-
-	excludes, err := executeCombinedGlob(excludeGlob)
+	templates := make([]*tplate, 0)
+	matcher := xignore.NewMatcher(fs)
+	matches, err := matcher.Matches(dir, &xignore.MatchesOptions{
+		Ignorefile:    Gomplateignore,
+		Nested:        true, // allow nested ignorefile
+		AfterPatterns: excludeGlob,
+	})
 	if err != nil {
 		return nil, err
 	}
 
-	templates := make([]*tplate, 0)
-	for _, entry := range entries {
-		nextInPath := filepath.Join(dir, entry.Name())
-		nextOutPath := filepath.Join(outDir, entry.Name())
+	// Unmatched ignorefile rules's files
+	files := matches.UnmatchedFiles
+	for _, file := range files {
+		nextInPath := filepath.Join(dir, file)
+		nextOutPath := filepath.Join(outDir, file)
 
-		if inList(excludes, nextInPath) {
-			continue
+		if mode == 0 {
+			stat, perr := fs.Stat(nextInPath)
+			if perr == nil {
+				mode = stat.Mode()
+			} else {
+				mode = dirMode
+			}
 		}
 
-		if entry.IsDir() {
-			t, err := walkDir(nextInPath, nextOutPath, excludes, mode, modeOverride)
-			if err != nil {
-				return nil, err
-			}
-			templates = append(templates, t...)
-		} else {
-			if mode == 0 {
-				mode = entry.Mode()
-			}
-			templates = append(templates, &tplate{
-				name:         nextInPath,
-				targetPath:   nextOutPath,
-				mode:         mode,
-				modeOverride: modeOverride,
-			})
+		// Ensure file parent dirs
+		if err = fs.MkdirAll(filepath.Dir(nextOutPath), dirMode); err != nil {
+			return nil, err
 		}
+
+		templates = append(templates, &tplate{
+			name:         nextInPath,
+			targetPath:   nextOutPath,
+			mode:         mode,
+			modeOverride: modeOverride,
+		})
 	}
+
 	return templates, nil
 }
 
@@ -213,16 +217,6 @@ func fileToTemplates(inFile, outFile string, mode os.FileMode, modeOverride bool
 	return tmpl, nil
 }
 
-func inList(list []string, entry string) bool {
-	for _, file := range list {
-		if file == entry {
-			return true
-		}
-	}
-
-	return false
-}
-
 func openOutFile(filename string, mode os.FileMode, modeOverride bool) (out io.WriteCloser, err error) {
 	if conv.ToBool(env.Getenv("GOMPLATE_SUPPRESS_EMPTY", "false")) {
 		out = newEmptySkipper(func() (io.WriteCloser, error) {
@@ -272,22 +266,6 @@ func readInput(filename string) (string, error) {
 	return string(bytes), nil
 }
 
-// takes an array of glob strings and executes it as a whole,
-// returning a merged list of globbed files
-func executeCombinedGlob(globArray []string) ([]string, error) {
-	var combinedExcludes []string
-	for _, glob := range globArray {
-		excludeList, err := afero.Glob(fs, glob)
-		if err != nil {
-			return nil, err
-		}
-
-		combinedExcludes = append(combinedExcludes, excludeList...)
-	}
-
-	return combinedExcludes, nil
-}
-
 // emptySkipper is a io.WriteCloser wrapper that will only start writing once a
 // non-whitespace byte has been encountered. The writer must be provided by the
 // `open` func

template_test.go

@@ -60,36 +60,6 @@ func TestOpenOutFile(t *testing.T) {
 	assert.Equal(t, Stdout, f)
 }
 
-func TestInList(t *testing.T) {
-	list := []string{}
-	assert.False(t, inList(list, ""))
-
-	list = nil
-	assert.False(t, inList(list, ""))
-
-	list = []string{"foo", "baz", "qux"}
-	assert.False(t, inList(list, "bar"))
-
-	list = []string{"foo", "bar", "baz"}
-	assert.True(t, inList(list, "bar"))
-}
-
-func TestExecuteCombinedGlob(t *testing.T) {
-	origfs := fs
-	defer func() { fs = origfs }()
-	fs = afero.NewMemMapFs()
-	_ = fs.MkdirAll("/tmp/one", 0777)
-	_ = fs.MkdirAll("/tmp/two", 0777)
-	_ = fs.MkdirAll("/tmp/three", 0777)
-	afero.WriteFile(fs, "/tmp/one/a", []byte("file a"), 0644)
-	afero.WriteFile(fs, "/tmp/two/b", []byte("file b"), 0644)
-	afero.WriteFile(fs, "/tmp/three/c", []byte("file c"), 0644)
-
-	excludes, err := executeCombinedGlob([]string{"/tmp/o*/*", "/*/*/b"})
-	assert.NoError(t, err)
-	assert.Equal(t, []string{"/tmp/one/a", "/tmp/two/b"}, excludes)
-}
-
 func TestWalkDir(t *testing.T) {
 	origfs := fs
 	defer func() { fs = origfs }()
@@ -104,7 +74,7 @@ func TestWalkDir(t *testing.T) {
 	afero.WriteFile(fs, "/indir/one/bar", []byte("bar"), 0644)
 	afero.WriteFile(fs, "/indir/two/baz", []byte("baz"), 0644)
 
-	templates, err := walkDir("/indir", "/outdir", []string{"/*/two"}, 0, false)
+	templates, err := walkDir("/indir", "/outdir", []string{"*/two"}, 0, false)
 
 	assert.NoError(t, err)
 	assert.Equal(t, 2, len(templates))