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function-trace: always show the trace

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If the user invokes nix with --trace-function-calls it means that they
want to see the trace.

(cherry picked from commit 619cc4af855fab7b0400586a4fd40745b23e72ad)
This commit is contained in:
zimbatm 2019-09-18 11:40:11 +00:00 • committed by Eelco Dolstra
parent 60429b86ba
commit c94fd5f51a
3 changed files with 4 additions and 6 deletions
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5
contrib/stack-collapse.py
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@ -1,12 +1,11 @@
#!/usr/bin/env nix-shell
#!nix-shell -i python3 -p python3 --pure
# To be used with `--trace-function-calls` and `-vvvv` and
# `flamegraph.pl`.
# To be used with `--trace-function-calls` and `flamegraph.pl`.
#
# For example:
#
# nix-instantiate --trace-function-calls -vvvv '<nixpkgs>' -A hello 2> nix-function-calls.trace
# nix-instantiate --trace-function-calls '<nixpkgs>' -A hello 2> nix-function-calls.trace
# ./contrib/stack-collapse.py nix-function-calls.trace > nix-function-calls.folded
# nix-shell -p flamegraph --run "flamegraph.pl nix-function-calls.folded > nix-function-calls.svg"