Bug 32156

Summary:	bash --rpm-requires doesn't go into command substitution
Product:	Sisyphus	Reporter:	Ivan Zakharyaschev <imz>
Component:	bash	Assignee:	placeholder <placeholder>
Status:	NEW ---	QA Contact:	qa-sisyphus
Severity:	normal
Priority:	P3	CC:	glebfm, ldv, placeholder
Version:	unstable
Hardware:	all
OS:	Linux

Description Ivan Zakharyaschev 2016-05-30 20:32:05 MSK

bash-3.2.57-alt1 (the same is true for bash4 --rpm-requires)

Example:

$ echo 'foo | bar' | bash --rpm-requires 
executable(/etc/bashrc)
executable(foo)
executable(bar)
$ echo '(foo | bar)' | bash --rpm-requires 
executable(/etc/bashrc)
executable(foo)
executable(bar)
$ echo 'echo $(foo | bar)' | bash --rpm-requires 
executable(/etc/bashrc)
$ echo 'echo `foo | bar`' | bash --rpm-requires 
executable(/etc/bashrc)
$ 

Expected output everywhere:

executable(foo)
executable(bar)

Comment 1 Dmitry V. Levin 2018-12-19 01:54:22 MSK

At least this behaviour is documented:
"command substitutions, conditional expressions, and eval builtin are not parsed so some dependencies may be missed."