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authorLudovic Courtès <ludo@gnu.org>2022-05-31 17:17:10 +0200
committerLudovic Courtès <ludo@gnu.org>2022-07-01 23:29:16 +0200
commit4ff12d1de7cd617b791996ee7ca1240660b4c20e (patch)
tree27bf6c0c43864848dd7db1ef08fc4d38d7a27ff3 /build-aux
parent9b8c442b254b82196fe2492142b3c3bbbd891a1b (diff)
downloadguix-4ff12d1de7cd617b791996ee7ca1240660b4c20e.tar.gz
profiles: Do not repeat entries in 'manifest' file.
Fixes <https://issues.guix.gnu.org/55499>.
Reported by Ricardo Wurmus <rekado@elephly.net>.

With this change, the manifest file created for:

  guix install r r-seurat r-cistopic r-monocle3 r-cicero-monocle3 r-assertthat

goes from 5.7M to 176K.  Likewise, on this profile, wall-clock time of:

  GUIX_PROFILING=gc guix package -I

goes from 0.7s to 0.1s, with heap usage going from 55M to 9M.

* guix/profiles.scm (manifest->gexp)[optional]: New procedure.
[entry->gexp]: Turn into a monadic procedure.  Return a 'repeated' sexp
if ENTRY was already visited before.
Adjust caller accordingly.  Bump manifest version.
(sexp->manifest)[sexp->manifest-entry]: Turn into a monadic procedure.
Add case for 'repeated' nodes.  Add each entry to the current state
vhash.
Add clause for version 4 manifests.
[sexp->manifest-entry/v3]: New procedure, with former
'sexp->manifest-entry' code.
* tests/profiles.scm ("deduplication of repeated entries"): New test.
* guix/build/profiles.scm (manifest-sexp->inputs+search-paths)[let-fields]:
New macro.
Use it.  Expect version 4.  Add clause for 'repeated' nodes.
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