Deprecate some contributions.

This is just a starting point to start discussion. I think we have a
few options with contributions:

- Stop accepting them altogether and move the ones we need/use/support
  into core commands
- Accept them on an unsupported basis and require they be added
  manually to the PATH
- Actively support and fix bugs in them all

Closes Homebrew/homebrew#30749.

Signed-off-by: Mike McQuaid <mike@mikemcquaid.com>

1 files changed, 6 insertions, 1 deletions

diff --git a/Library/Contributions/cmd/brew-graph b/Library/Contributions/cmd/brew-graph
index 07b3464b4..ab042cdbc 100755
--- a/Library/Contributions/cmd/brew-graph
+++ b/Library/Contributions/cmd/brew-graph
@@ -5,6 +5,7 @@ $ brew graph | dot -Tsvg -ohomebrew.html
 $ open homebrew.html
 """
 from __future__ import with_statement
+from __future__ import print_function
 
 from contextlib import contextmanager
 import re
@@ -14,7 +15,7 @@ import sys
 
 def run(command, print_command=False):
     "Run a command, returning the exit code and output."
-    if print_command: print command
+    if print_command: print(command)
     p = Popen(command, stdout=PIPE)
     output, errput = p.communicate()
     return p.returncode, output
@@ -361,4 +362,8 @@ def main():
 
 
 if __name__ == "__main__":
+    print("""Warning: brew graph is unsupported and will be removed soon.
+You should use `brew deps --tree` instead.
+Please feel free volunteer to support it in a tap.
+    """, file=sys.stderr)
     main()