gnu/packages/patches/debops-debops-defaults-fall-back-to-less.patch

   1 From 5059daf8bd59a83f520c14731173ea76ce8b8661 Mon Sep 17 00:00:00 2001
   2 From: Hartmut Goebel <h.goebel@crazy-compilers.com>
   3 Date: Sun, 8 Sep 2019 13:09:15 +0200
   4 Subject: [PATCH] [debops-defaults] If `view` is not available, try less, etc.
   5
   6 ---
   7  bin/debops-defaults | 21 +++++++++++++++------
   8  1 file changed, 15 insertions(+), 6 deletions(-)
   9
  10 diff --git a/bin/debops-defaults b/bin/debops-defaults
  11 index 9dd87fe0a..3e3db4c41 100755
  12 --- a/bin/debops-defaults
  13 +++ b/bin/debops-defaults
  14 @@ -96,13 +96,22 @@ def main(role_list):
  15      config = read_config(project_root)
  16      playbooks_path = find_playbookpath(config, project_root, required=True)
  17
  18 -    # Make sure required commands are present
  19 -    require_commands('view')
  20 -
  21 -    if sys.stdout.isatty():
  22 +    # Check if one of the output commands is present
  23 +    sys.stdout = io.BytesIO()  # suppress error message, if any
  24 +    for cmd_args in (('view', '+set ft=yaml', '-'),
  25 +                     ('less', '-'),
  26 +                     ('more', '-')):
  27 +        try:
  28 +            require_commands(cmd_args[0])
  29 +            break
  30 +        except SystemExit:
  31 +            # this command was not found
  32 +            cmd_args = None
  33 +    sys.stdout = sys.__stdout__
  34 +
  35 +    if cmd_args and sys.stdout.isatty():
  36          # if script is run as standalone, redirect to view
  37 -        view = subprocess.Popen(['view', '+set ft=yaml', '-'],
  38 -                                stdin=subprocess.PIPE)
  39 +        view = subprocess.Popen(cmd_args, stdin=subprocess.PIPE)
  40          try:
  41              aggregate_defaults(playbooks_path, role_list, view.stdin)
  42          except IOError as e:
  43 --
  44 2.21.0
  45