Gentoo Archives: gentoo-pms

From: Ulrich Mueller <ulm@g.o>
To: gentoo-pms@l.g.o
Subject: Re: [gentoo-pms] EAPI specification in ebuilds
Date: Sun, 13 May 2012 19:00:28
In Reply to: Re: [gentoo-pms] EAPI specification in ebuilds by David Leverton
>>>>> On Sun, 13 May 2012, David Leverton wrote:
> Apologies for not noticing these sooner, but now that I come to > implement it...
>> +\begin{verbatim} >> +^[ \t]*EAPI=(['"]?)([A-Za-z0-9+_.-]*)\1[ \t]*(#.*)?$ >> +\end{verbatim}
> 1) Should an empty value be allowed here?
That was the intention, because the spec says that an empty value is equivalent to 0.
> 2) If there's a trailing comment it needs to have at least one > whitespace between it and the end of the value:
> [dleverton@shiny-one pms] $ EAPI=123#foo > [dleverton@shiny-one pms] $ echo ${EAPI} > 123#foo
Darn. So we need another [ \t] in the last subexpression: -^[ \t]*EAPI=(['"]?)([A-Za-z0-9+_.-]*)\1[ \t]*(#.*)?$ +^[ \t]*EAPI=(['"]?)([A-Za-z0-9+_.-]*)\1[ \t]*([ \t]#.*)?$
>> +The package manager may optionally determine the EAPI of an ebuild by parsing its first non-blank >> +and non-comment line, using above regular expression. If a recognised EAPI has been determined >> +such, then the package manager must make sure that the \t{EAPI} value obtained by sourcing the >> +ebuild with bash is identical to the EAPI obtained by parsing. The ebuild must be treated as >> +invalid if these values are different.
> 3) If the first non-blank non-comment /doesn't/ match the magic regexp, > should the PM insist that the post-source EAPI is 0 (or unset), or > should it accept whatever it gets?
The former. If the first non-blank non-comment doesn't match the regexp, then the EAPI determined by parsing is 0 (or empty, which is equivalent). Do we need to clarify the wording here? (Patches are welcome.) Ulrich


Subject Author
[gentoo-pms] [PATCH 2/2] Require a space before the trailing comment David Leverton <levertond@××××××××××.com>
[gentoo-pms] [PATCH 1/2] Clarify wording for EAPI parsing David Leverton <levertond@××××××××××.com>