util: add an optional `prefix` argument to debugstacktrace
This is useful when using it in a specific context.
Differential Revision: https://phab.mercurial-scm.org/D7477
--- a/mercurial/util.py Sun Nov 17 05:32:38 2019 +0100
+++ b/mercurial/util.py Sun Nov 17 06:26:41 2019 +0100
@@ -3466,6 +3466,7 @@
f=procutil.stderr,
otherf=procutil.stdout,
depth=0,
+ prefix=b'',
):
'''Writes a message to f (stderr) with a nicely formatted stacktrace.
Skips the 'skip' entries closest to the call, then show 'depth' entries.
@@ -3475,9 +3476,9 @@
'''
if otherf:
otherf.flush()
- f.write(b'%s at:\n' % msg.rstrip())
+ f.write(b'%s%s at:\n' % (prefix, msg.rstrip()))
for line in getstackframes(skip + 1, depth=depth):
- f.write(line)
+ f.write(prefix + line)
f.flush()