Date: Mon, 28 Nov 2022 22:14:15 +0100 From: Matthias Fechner <idefix@fechner.net> To: ports@freebsd.org Subject: Re: Question to EXTRACT_ONLY Message-ID: <d18af3af-d89c-2adc-4f79-3147a4e59f60@fechner.net> In-Reply-To: <667de09b-c23f-42e4-00ba-c52e4266c23a@fechner.net> References: <667de09b-c23f-42e4-00ba-c52e4266c23a@fechner.net>
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Dear all,
I found some good explanation in `man make`, but some questions are
open, maybe someone can give a little bit more insight.
On 28.11.22 19:12, Matthias Fechner wrote:
> EXTRACT_ONLY= ${ALLFILES:Nprebuilt*:}
it takes the variable ${ALLFILES}, the :N operator removes everything
that matches, so in this case every string that begins with prebuilt is
removed.
But what does the last `:` at the end of this string?
>
> EXTRACT_ONLY+= ${DISTFILES:N*.mod\:*:N*.mod:C/:.*//}
So if I understood this correctly at takes the variable ${DISTFILES} and
removes everything that matches `*.mod:*`.
Then as next it removes everything that matches `*.mod`.
As last step a regular expression is executed that removes `:*` (the *
is here any character), so the string `ksdjhe:sdhg34` is changed to
`ksdjhe`.
Thanks
Matthias
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