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>
(cherry picked from commit c55c294be6f5119f4c58a4e7a0bc052904126569)
Signed-off-by: Steve Sakoman <steve@sakoman.com>

1 files changed, 13 insertions, 3 deletions

diff --git a/meta/lib/oe/terminal.py b/meta/lib/oe/terminal.py
index eb10a6e33e..2ac39df9e1 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,