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package topkg
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opam package file access.
Normally opam metadata access is only needed at distribution time and this is handled by Topkg_care.Opam.File using the opam-format library.
However there is one case where we want to be able to access the metadata from Topkg: on pin builds where the watermarking process needs to be run to turn the repo into a pseudo-distribution.
Since we don't want Topkg to have any dependency and that opam currently doesn't allow to consult the fields of arbitrary opam files (see issue #2446) we assume a pin build has the topkg tool installed and call to it to get the opam fields for watermarking (if topkg is unavailable the watermarks are simply undefined).
opam file
The type for a simplified model the fields of an opam file. See Topkg_care.Opam.File.
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