From 405eaaf99287a73922d2f7bf55f457d3c24aacb7 Mon Sep 17 00:00:00 2001
From: Taylor Blau <me@ttaylorr.com>
Date: Fri, 1 Jul 2016 15:52:11 -0600
Subject: [PATCH] commands/track: ignore blacklisted paths by glob and name

---
 commands/command_track.go | 19 +++++++++++++++++++
 test/test-track.sh        | 29 +++++++++++++++++++++++++++++
 2 files changed, 48 insertions(+)

diff --git a/commands/command_track.go b/commands/command_track.go
index b66f643b..6c49eaf0 100644
--- a/commands/command_track.go
+++ b/commands/command_track.go
@@ -17,6 +17,10 @@ import (
 )
 
 var (
+	blacklistedTrackArguments = []string{
+		".gitattributes", // TODO
+	}
+
 	trackCmd = &cobra.Command{
 		Use: "track",
 		Run: trackCommand,
@@ -67,6 +71,11 @@ func trackCommand(cmd *cobra.Command, args []string) {
 
 ArgsLoop:
 	for _, pattern := range args {
+		if forbidden := isBlacklisted(pattern); forbidden != "" {
+			Print("Pattern %s matches forbidden file %s. If you would like to track %s, modify .gitattributes manually.", pattern, forbidden, forbidden)
+			continue
+		}
+
 		for _, known := range knownPaths {
 			if known.Path == filepath.Join(relpath, pattern) {
 				Print("%s already supported", pattern)
@@ -181,6 +190,16 @@ func needsTrailingLinebreak(filename string) bool {
 	return !strings.HasSuffix(string(buf[0:bytesRead]), "\n")
 }
 
+func isBlacklisted(pattern string) string {
+	for _, b := range blacklistedTrackArguments {
+		if matched, _ := filepath.Match(pattern, b); matched {
+			return b
+		}
+	}
+
+	return ""
+}
+
 func init() {
 	RootCmd.AddCommand(trackCmd)
 }
diff --git a/test/test-track.sh b/test/test-track.sh
index 777281fd..57d34e6a 100755
--- a/test/test-track.sh
+++ b/test/test-track.sh
@@ -220,3 +220,32 @@ begin_test "track in symlinked dir"
   }
 )
 end_test
+
+begin_test "track blacklisted files by name"
+(
+  set -e
+
+  repo="track_blacklisted_by_name"
+  mkdir "$repo"
+  cd "$repo"
+  git init
+
+  git lfs track .gitattributes 2>&1 > track.log
+  grep "Pattern .gitattributes matches forbidden file .gitattributes" track.log
+)
+end_test
+
+begin_test "track blacklisted files with glob"
+(
+  set -e
+
+  repo="track_blacklisted_glob"
+  mkdir "$repo"
+  cd "$repo"
+  git init
+
+  git lfs track ".git*" 2>&1 > track.log
+  grep "Pattern .git\* matches forbidden file" track.log
+)
+end_test
+