lib/oe/terminal: Fix tmux new-session on older tmux versions (<1.9)

`tmux new -c` fails on tmux older than 1.9, when that flag was added.
We can omit the flag for older versions of tmux, and the working
directory gets set even without it.

Signed-off-by: Peter Budny <pbbudny@amazon.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 13 insertions, 3 deletions

diff --git a/meta/lib/oe/terminal.py b/meta/lib/oe/terminal.py
index 61c2687ef4..59aa80de66 100644
--- a/meta/lib/oe/terminal.py
+++ b/meta/lib/oe/terminal.py
@@ -163,7 +163,12 @@ class Tmux(Terminal):
         # devshells, if it's already there, add a new window to it.
         window_name = 'devshell-%i' % os.getpid()
 
-        self.command = 'tmux new -c "{{cwd}}" -d -s {0} -n {0} "{{command}}"'.format(window_name)
+        self.command = 'tmux new -c "{{cwd}}" -d -s {0} -n {0} "{{command}}"'
+        if not check_tmux_version('1.9'):
+            # `tmux new-session -c` was added in 1.9;
+            # older versions fail with that flag
+            self.command = 'tmux new -d -s {0} -n {0} "{{command}}"'
+        self.command = self.command.format(window_name)
         Terminal.__init__(self, sh_cmd, title, env, d)
 
         attach_cmd = 'tmux att -t {0}'.format(window_name)
@@ -253,13 +258,18 @@ def spawn(name, sh_cmd, title=None, env=None, d=None):
         except OSError:
            return
 
+def check_tmux_version(desired):
+    vernum = check_terminal_version("tmux")
+    if vernum and LooseVersion(vernum) < desired:
+        return False
+    return vernum
+
 def check_tmux_pane_size(tmux):
     import subprocess as sub
     # On older tmux versions (<1.9), return false. The reason
     # is that there is no easy way to get the height of the active panel
     # on current window without nested formats (available from version 1.9)
-    vernum = check_terminal_version("tmux")
-    if vernum and LooseVersion(vernum) < '1.9':
+    if not check_tmux_version('1.9'):
         return False
     try:
         p = sub.Popen('%s list-panes -F "#{?pane_active,#{pane_height},}"' % tmux,