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Handle multiline command-line args#363

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Handle multiline command-line args #363

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4 changes: 2 additions & 2 deletions mprof.py
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Original file line numberDiff line numberDiff line change
@@ -1,6 +1,7 @@
import glob
import os
import os.path as osp
import shlex
import sys
import re
import copy
Expand DownExpand Up@@ -175,8 +176,7 @@ def clean_action():

def get_cmd_line(args):
"""Given a set or arguments, compute command-line."""
blanks = set(' \t')
args = [s if blanks.isdisjoint(s) else "'" + s + "'" for s in args]
args = [shlex.quote(s).replace('\n', '\\n') for s in args]
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@ferdnycferdnycMay 24, 2025

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I don't think using shlex.quote is the right choice here, because it quotes strings in ways that are parseable by the shell, and the strings encoded in the file will never be parsed by the shell. But the shell-escaped versions look ugly in the plots.

For example, this command:

mprof echo "Hello's fine"

...will be escaped by the master branch code as echo 'Hello's fine' which looks sort of nonsensical but it's fine, it doesn't matter if the quoting is legal, just that it's intelligible in the plot.

Using shlex.quote, though, what you get for a plot label is not really an improvement:

image

Doing the .replace('\n', '\\n') is a good idea (though I think newlines could also just be replaced with a space, and it would be fine), but the quoting should be left to simple, not-technically-correct-but-we-get-the-idea logic like in the previous code.

return ' '.join(args)

def find_first_process(name):
Expand Down