From f246fb2fc2b7bc04e9504dc0705a63d74a6c90ce Mon Sep 17 00:00:00 2001
From: Tony Metzidis <anthony.metzidis@gmail.com>
Date: Sun, 19 Jan 2020 02:42:10 -0800
Subject: [PATCH] Show error message when failed to start preview command
 (#1810)

Fix #1637
---
 .gitignore      | 1 +
 README.md       | 3 ++-
 src/terminal.go | 5 ++++-
 3 files changed, 7 insertions(+), 2 deletions(-)

diff --git a/.gitignore b/.gitignore
index d61bd41..b76a3f1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -8,3 +8,4 @@ doc/tags
 vendor
 gopath
 *.zwc
+fzf
diff --git a/README.md b/README.md
index 4ee7d10..7d36065 100644
--- a/README.md
+++ b/README.md
@@ -480,7 +480,8 @@ See *KEY BINDINGS* section of the man page for details.
 ### Preview window
 
 When `--preview` option is set, fzf automatically starts an external process with
-the current line as the argument and shows the result in the split window.
+the current line as the argument and shows the result in the split window. Your
+`$SHELL` is used to execute the command with `$SHELL -c COMMAND`
 
 ```bash
 # {} is replaced to the single-quoted string of the focused line
diff --git a/src/terminal.go b/src/terminal.go
index f31ed1e..56085be 100644
--- a/src/terminal.go
+++ b/src/terminal.go
@@ -1576,7 +1576,10 @@ func (t *Terminal) Loop() {
 					var out bytes.Buffer
 					cmd.Stdout = &out
 					cmd.Stderr = &out
-					cmd.Start()
+					err := cmd.Start()
+					if err != nil {
+						out.Write([]byte(err.Error()))
+					}
 					finishChan := make(chan bool, 1)
 					updateChan := make(chan bool)
 					go func() {