From 8e4959dccd8959bbc0799ef0b00870c89763c67f Mon Sep 17 00:00:00 2001
From: Marius <maerious@gmail.com>
Date: Thu, 15 Sep 2016 23:15:54 +0200
Subject: [PATCH] Catch error from non-existing hook files when executing

Closes #62
---
 cmd/tusd/cli/hooks.go | 16 ++++++++++++++--
 1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/cmd/tusd/cli/hooks.go b/cmd/tusd/cli/hooks.go
index 0baf3e3..10c7abb 100644
--- a/cmd/tusd/cli/hooks.go
+++ b/cmd/tusd/cli/hooks.go
@@ -90,10 +90,22 @@ func invokeHookSync(typ HookType, info tusd.FileInfo, captureOutput bool) ([]byt
 	cmd.Dir = Flags.HooksDir
 	cmd.Stderr = os.Stderr
 
+	// If `captureOutput` is true, this function will return the output (both,
+	// stderr and stdout), else it will use this process' stdout
+	var output []byte
 	if !captureOutput {
 		cmd.Stdout = os.Stdout
-		return nil, cmd.Run()
+		err = cmd.Run()
 	} else {
-		return cmd.Output()
+		output, err = cmd.Output()
 	}
+
+	// Ignore the error, only, if the hook's file could not be found. This usually
+	// means that the user is only using a subset of the available hooks.
+	if os.IsNotExist(err) {
+		stdout.Printf("Unable to invoke %s hook: %s\n", name, err)
+		err = nil
+	}
+
+	return output, err
 }