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-rw-r--r--support/lib/util.py12
1 files changed, 8 insertions, 4 deletions
diff --git a/support/lib/util.py b/support/lib/util.py
index 3a852f4..915e33c 100644
--- a/support/lib/util.py
+++ b/support/lib/util.py
@@ -2,7 +2,8 @@ import contextlib, subprocess, tempfile, shutil, re, os
class UserError(Exception):
- pass
+ def __init__(self, message, *args):
+ super(UserError, self).__init__(message.format(*args))
def rename_atomic(source_path, target_path):
@@ -43,11 +44,14 @@ def command(args, remove_env = [], set_env = { }):
for k, v in set_env.items():
env[k] = v
- process = subprocess.Popen(args, env = env)
- process.wait()
+ try:
+ process = subprocess.Popen(args, env = env)
+ process.wait()
+ except OSError as e:
+ raise UserError('Error running {}: {}', args[0], e)
if process.returncode:
- raise UserError('Command failed: {}'.format(' '.join(args)))
+ raise UserError('Command failed: {}', ' '.join(args))
def bash_escape_string(string):