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Merge pull request #167393 from iblech/patch-docs-cc

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nixos-rebuild, switch-to-configuration: document and protect against cross compilation subtlety
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Janne Heß 2022-04-14 12:30:39 +02:00 • committed by GitHub
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12
nixos/modules/system/activation/switch-to-configuration.pl
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@ -1,5 +1,17 @@
#! @perl@/bin/perl
# Issue #166838 uncovered a situation in which a configuration not suitable
# for the target architecture caused a cryptic error message instead of
# a clean failure. Due to this mismatch, the perl interpreter in the shebang
# line wasn't able to be executed, causing this script to be misinterpreted
# as a shell script.
#
# Let's detect this situation to give a more meaningful error
# message. The following two lines are carefully written to be both valid Perl
# and Bash.
printf "Perl script erroneously interpreted as shell script,\ndoes target platform match nixpkgs.crossSystem platform?\n" && exit 1
if 0;
use strict;
use warnings;
use Config::IniFiles;