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authorLudovic Courtès <ludo@gnu.org>2020-10-20 09:18:07 +0200
committerLudovic Courtès <ludo@gnu.org>2020-10-20 16:30:15 +0200
commit8db4ebb0cd9bfdcf1aea63eb8d20eb6af0c87c93 (patch)
tree8510a314aad6e64e3709ba231ecb13d7959549cf /doc
parent2bd60ca1fb1b3a830ee644369b9a7f8c8b5d0404 (diff)
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packages: Better preserve object identity when rewriting.
Fixes a bug whereby the presence of propagated inputs could lead to two non-eq? but actually equal packages in a bag's inputs. The problem would manifest itself when running, for instance: guix build inkscape -d --with-graft=glib=glib-networking --no-grafts The resulting derivation would differ due from that without '--with-graft'. This was due to the fact that glib propagates libffi; this instance of libffi was not rewritten even though other instances in the graph were rewritten. Thus, glib would end up with two non-eq? libffi instances, which in turn would lead to duplicate entries in its '%build-inputs' variable. Fixes <https://bugs.gnu.org/43890>. * guix/packages.scm (package-mapping)[rewrite]: Remove call to 'cut?' and call 'replace' unconditionally. [replace]: Add 'cut?' case. * tests/guix-build.sh: Add test combining '--no-grafts' and '--with-graft'. * tests/packages.scm ("package-input-rewriting/spec, identity") ("package-input-rewriting, identity"): New tests.
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