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news: Add entry for deep graph rewriting.

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* etc/news.scm: Add entry.
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Ludovic Courtès 2020-09-27 23:10:47 +02:00
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commit db17af70f6
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etc/news.scm
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@ -13,6 +13,30 @@
(channel-news
(version 0)
(entry (commit "8819551c8d2a12cd4e84e09b51e434d05a012c9d")
(title (en "Package transformations now apply to implicit inputs"))
(body
(en "Package transformation options such as @option{--with-branch},
@option{--with-input}, and so on now apply to implicit inputs---previously
only a package's explicit inputs would be affected. This allows for things
such as replacing the Python dependency of a package that uses
@code{python-build-system}:
@example
guix install --with-input=python=python2 python-itsdangerous
@end example
Another example is grafting a different version of the GNU C
Library (@code{glibc} is an implicit input of almost all the packages and is
``deep down'' in the dependency graph):
@example
guix build --with-graft=glibc=glibc@@2.31 hello
@end example
Run @command{info \"(guix) Package Transformation Options\"} for more
info.")))
(entry (commit "a98712785e0b042a290420fd74e5a4a5da4fc68f")
(title (en "New @command{guix git authenticate} command")
(de "Neuer Befehl @command{guix git authenticate}")