kiss-revdepends: print only exact matches

[aabacchus]

The ERE matches the package name, followed by either a space character or an end-of-line. This prevents matching packages whose names contain the target name. A word boundary '\>' is not used, because this matches a hyphen '-' and not end-of-lines. The end-of-line anchor '$' cannot be used in a bracket expression.

[dylanaraps]

Thanks

[aabacchus]

@dylanaraps Is alternation part of POSIX BREs? As far as I can tell, the sequence \| isn't defined for POSIX BREs, but \ is specified for EREs. Despite this, all the implementations I've tested - GNU, Busybox, sbase - accept it, except for 9base, which uses EREs of the type "before egrep got complicated". I think the widest compatibility is to use extended mode?

[aabacchus]

From the most recent draft of POSIX 1003.1 202x, Rationale for Base Definitions:

Some implementations have extended the BRE syntax to add alternation. For example, the subexpression "\(foo$\|bar\)" would match either "foo" at the end of the string or "bar" anywhere. The extension is triggered by the use of the undefined "\|" sequence.

[dylanaraps]

Fixed, thanks.