Answering my own email, in case someone is curious:
On 25.02.2017 14:22, Mario Emmenlauer wrote:
>
> I found some packages that specify "depends" inside a function in
> the PKGBUILD. If I saw this correctly, those depends are currently
> not being resolved from the ci system. The problem seems to be
> that sourcing the PKGBUILD does not resolve variables in functions
> (which makes perfect sense). However I could not find an easy way
> to actually resolve them. Does anyone know a way how they could be
> resolved, or how the PKGBUILD could be modified in such a way that
> it becomes possible to detect all dependencies for a package?
>
> My motivation is to build a dependency graph for all packages in
> order to trigger a build of the full cascade whenever a package
> is modified.
With sourcing alone I could not resolve the depends inside functions
in the PKGBUILD. A relatively complex but working solution was to use
a first check with grep, to see if the depends are inside functions or
in the main section. If they are inside functions, then use perl to
extract all depends-sections from the file, then source the PKGBUILD
to resolve variables in the depends. Its not a super nice solution,
but works pretty ok. In summary it looks something like this
(pseudo-code):
# get the file contents, remove comments, and concatenate it into
# a single big string (to remove line breaks):
FILE=$(cat PKGBUILD|perl -pe 's@#.*@@g'|tr '\n' ' ')
# iteratively extract the depends=(.*) blocks. This required a loop
# over the multiple occurrences of depends=... in the file:
PROPERTYVALUES=...
# export the variables from the PKGBUILD:
set -o allexport
# use envsubst from 'gettext' to resolve the variables in the string:
export MINGW_PACKAGE_PREFIX="mingw-w64"
source PKGBUILD
PROPERTYVALUES=$(echo "${PROPERTYVALUES}"|envsubst)
# turn off exporting variables:
set +o allexport
Cheers,
Mario Emmenlauer
--
BioDataAnalysis GmbH, Mario Emmenlauer Tel. Buero: +49-89-74677203
Balanstr. 43 mailto: memmenlauer * biodataanalysis.de
D-81669 München http://www.biodataanalysis.de/
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