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Diffstat (limited to 'doc')
| -rw-r--r-- | doc/guix.texi | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/doc/guix.texi b/doc/guix.texi index aa779e38e2..b2498d039e 100644 --- a/doc/guix.texi +++ b/doc/guix.texi @@ -2946,6 +2946,16 @@ with @var{libressl}. Then we use it to define a @dfn{variant} of the This is exactly what the @option{--with-input} command-line option does (@pxref{Package Transformation Options, @option{--with-input}}). +A more generic procedure to rewrite a package dependency graph is +@code{package-mapping}: it supports arbitrary changes to nodes in the +graph. + +@deffn {Scheme Procedure} package-mapping @var{proc} [@var{cut?}] +Return a procedure that, given a package, applies @var{proc} to all the packages +depended on and returns the resulting package. The procedure stops recursion +when @var{cut?} returns true for a given package. +@end deffn + @menu * package Reference :: The package data type. * origin Reference:: The origin data type. |