[OE-core] [PATCH] terminal.bbclass: use var-SHELL as the shebang of wrapper script

[Hongxu Jia]

The devshell.bbclass set var-SHELL to var-DEVSHELL, and terminal.bbclass
initial var-SHELL with `bash'. Keep sync with it, use var-SHELL rather
than hardcoded `/bin/sh' as the shebang of wrapper script.

On Ubuntu host, default shell is dash (/bin/sh -> dash), even though
we assign var-SHELL with `/bin/bash', the wrapper script is still dashism.

Signed-off-by: Hongxu Jia <hongxu.jia at windriver.com>
---
 meta/classes/terminal.bbclass | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/meta/classes/terminal.bbclass b/meta/classes/terminal.bbclass
index a27e10c..73e765d 100644
--- a/meta/classes/terminal.bbclass
+++ b/meta/classes/terminal.bbclass
@@ -25,7 +25,8 @@ def emit_terminal_func(command, envdata, d):
     bb.utils.mkdirhier(os.path.dirname(runfile))
 
     with open(runfile, 'w') as script:
-        script.write('#!/bin/sh -e\n')
+        script.write('#!/usr/bin/env %s\n' % d.getVar('SHELL'))
+        script.write('set -e\n')
         bb.data.emit_func(cmd_func, script, envdata)
         script.write(cmd_func)
         script.write("\n")
-- 
2.7.4