Attempt auto-generated files being hidden by default

.gitattributes

@@ -0,0 +1 @@
+ui/bindata.go linguist-generated=true

index/index.go

@@ -36,8 +36,9 @@ type Index struct {
 }
 
 type IndexOptions struct {
-	ExcludeDotFiles bool
-	SpecialFiles    []string
+	ExcludeDotFiles           bool
+	SpecialFiles              []string
+	AutoGeneratedFilePatterns []string
 }
 
 type SearchOptions struct {
@@ -66,8 +67,9 @@ type SearchResponse struct {
 }
 
 type FileMatch struct {
-	Filename string
-	Matches  []*Match
+	Filename      string
+	Matches       []*Match
+	AutoGenerated bool
 }
 
 type ExcludedFile struct {
@@ -76,10 +78,11 @@ type ExcludedFile struct {
 }
 
 type IndexRef struct {
-	Url  string
-	Rev  string
-	Time time.Time
-	dir  string
+	Url                       string
+	Rev                       string
+	Time                      time.Time
+	dir                       string
+	AutoGeneratedFilePatterns []string
 }
 
 func (r *IndexRef) Dir() string {
@@ -182,6 +185,20 @@ func (n *Index) Search(pat string, opt *SearchOptions) (*SearchResponse, error)
 		}
 	}
 
+	var autoGeneratedFre *regexp.Regexp
+	if len(n.Ref.AutoGeneratedFilePatterns) > 0 {
+		var pattern, sep string
+		for _, fp := range n.Ref.AutoGeneratedFilePatterns {
+			pattern += sep + "(" + fp + ")"
+			sep = "|"
+		}
+		autoGeneratedFre, err = regexp.Compile(pattern)
+		if err != nil {
+			return nil, err
+		}
+	}
+
+
 	files := n.idx.PostingQuery(index.RegexpQuery(re.Syntax))
 	for _, file := range files {
 		var matches []*Match
@@ -231,9 +248,13 @@ func (n *Index) Search(pat string, opt *SearchOptions) (*SearchResponse, error)
 		filesFound++
 		if len(matches) > 0 {
 			filesCollected++
+
+			autoGenerated := autoGeneratedFre != nil && autoGeneratedFre.MatchString(name, true, true) > 0
+
 			results = append(results, &FileMatch{
-				Filename: name,
-				Matches:  matches,
+				Filename:      name,
+				Matches:       matches,
+				AutoGenerated: autoGenerated,
 			})
 		}
 	}
@@ -485,10 +506,11 @@ func Build(opt *IndexOptions, dst, src, url, rev string) (*IndexRef, error) {
 	}
 
 	r := &IndexRef{
-		Url:  url,
-		Rev:  rev,
-		Time: time.Now(),
-		dir:  dst,
+		Url:                       url,
+		Rev:                       rev,
+		Time:                      time.Now(),
+		dir:                       dst,
+		AutoGeneratedFilePatterns: opt.AutoGeneratedFilePatterns,
 	}
 
 	if err := r.writeManifest(); err != nil {

searcher/searcher.go

@@ -407,16 +407,18 @@ func newSearcher(
 		return nil, err
 	}
 
-	opt := &index.IndexOptions{
-		ExcludeDotFiles: repo.ExcludeDotFiles,
-		SpecialFiles:    wd.SpecialFiles(),
-	}
 
 	rev, err := wd.PullOrClone(vcsDir, repo.Url)
 	if err != nil {
 		return nil, err
 	}
 
+	opt := &index.IndexOptions{
+		ExcludeDotFiles:           repo.ExcludeDotFiles,
+		SpecialFiles:              wd.SpecialFiles(),
+		AutoGeneratedFilePatterns: wd.AutoGeneratedFilePatterns(vcsDir),
+	}
+
 	var idxDir string
 	ref := refs.find(repo.Url, rev)
 	if ref == nil {

ui/assets/js/hound.js

@@ -693,7 +693,7 @@ var ContentFor = function(line, regexp) {
 
 var FileContentView = React.createClass({
   getInitialState: function() {
-    return { open: true };
+    return { open: !this.props.isAutoGenerated };
   },
   toggleContent: function() {
     this.state.open ? this.closeContent(): this.openContent();
@@ -763,7 +763,8 @@ var FilesView = React.createClass({
         rev={rev}
         fileName={match.Filename}
         blocks={CoalesceMatches(match.Matches)}
-        regexp={regexp}/>
+        regexp={regexp}
+        isAutoGenerated={match.AutoGenerated}/>
     });
 
 
@@ -886,7 +887,8 @@ var ResultView = React.createClass({
           rev={result.Rev}
           repo={result.Repo}
           regexp={regexp}
-          files={result.FilesWithMatch}/>
+          files={result.FilesWithMatch}
+          />
       );
     });
     var actions = '';

vcs/bzr.go

@@ -77,3 +77,7 @@ func (g *BzrDriver) SpecialFiles() []string {
 		".bzr",
 	}
 }
+
+func (g *BzrDriver) AutoGeneratedFilePatterns(dir string) []string {
+	return []string{}
+}

vcs/git.go

@@ -1,11 +1,13 @@
 package vcs
 
 import (
+	"bufio"
 	"bytes"
 	"encoding/json"
 	"fmt"
 	"io"
 	"log"
+	"os"
 	"os/exec"
 	"path/filepath"
 	"regexp"
@@ -15,6 +17,7 @@ import (
 const defaultRef = "master"
 
 var headBranchRegexp = regexp.MustCompile(`HEAD branch: (?P<branch>.+)`)
+var autoGeneratedFileRegexp = regexp.MustCompile(`(?P<path>.+) linguist-generated=true`)
 
 func init() {
 	Register(newGit, "git")
@@ -151,6 +154,29 @@ func (g *GitDriver) SpecialFiles() []string {
 	}
 }
 
+func (g *GitDriver) AutoGeneratedFilePatterns(dir string) []string {
+	var filePatterns []string
+	path := filepath.Join(dir, ".gitattributes")
+
+	file, err := os.Open(path)
+	if err != nil {
+		return filePatterns
+	}
+	defer file.Close()
+
+	scanner := bufio.NewScanner(file)
+	for scanner.Scan() {
+		matches := autoGeneratedFileRegexp.FindStringSubmatch(scanner.Text())
+		if len(matches) == 2 {
+			pattern := strings.ReplaceAll(matches[1], "**", "*")
+			pattern = strings.ReplaceAll(pattern, "*", ".*")
+			filePatterns = append(filePatterns, pattern)
+		}
+	}
+
+	return filePatterns
+}
+
 func (d *headBranchDetector) detectRef(dir string) string {
 	output, err := run("git show remote info", dir,
 		"git",

vcs/hg.go

@@ -79,3 +79,7 @@ func (g *MercurialDriver) SpecialFiles() []string {
 		".hg",
 	}
 }
+
+func (g *MercurialDriver) AutoGeneratedFilePatterns(dir string) []string {
+	return []string{}
+}

vcs/svn.go

@@ -100,3 +100,7 @@ func (g *SVNDriver) SpecialFiles() []string {
 		".svn",
 	}
 }
+
+func (g *SVNDriver) AutoGeneratedFilePatterns(dir string) []string {
+	return []string{}
+}

vcs/vcs.go

@@ -26,6 +26,10 @@ type Driver interface {
 
 	// Return a list of special filenames that should not be indexed.
 	SpecialFiles() []string
+
+	// Return a list of file path patterns that are marked as auto-generated.
+	AutoGeneratedFilePatterns(dir string) []string
+
 }
 
 // An API to interact with a vcs working directory. This is