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This commit contains a Cabal submodule update which unifies installed
package IDs and package keys under a single notion, a Component ID.
We update GHC to keep follow this unification. However, this commit
does NOT rename installed package ID to component ID and package key to
unit ID; the plan is to do that in a companion commit.
- Compiler info now has "Requires unified installed package IDs"
- 'exposed' is now expected to contain unit keys, not IPIDs.
- Shadowing is no more. We now just have a very simple strategy
to deal with duplicate unit keys in combined package databases:
if their ABIs are the same, use the latest one; otherwise error.
Package databases maintain the invariant that there can only
be one entry of a unit ID.
Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
Test Plan: validate
Reviewers: simonpj, austin, bgamari, hvr, goldfire
Subscribers: thomie
Differential Revision: https://phabricator.haskell.org/D1184
GHC Trac Issues: #10714
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This patch set makes us no longer assume that a package key is a human
readable string, leaving Cabal free to "do whatever it wants" to allocate
keys; we'll look up the PackageId in the database to display to the user.
This also means we have a new level of qualifier decisions to make at the
package level, and rewriting some Safe Haskell error reporting code to DTRT.
Additionally, we adjust the build system to use a new ghc-cabal output
Make variable PACKAGE_KEY to determine library names and other things,
rather than concatenating PACKAGE/VERSION as before.
Adds a new `-this-package-key` flag to subsume the old, erroneously named
`-package-name` flag, and `-package-key` to select packages by package key.
RFC: The md5 hashes are pretty tough on the eye, as far as the file
system is concerned :(
ToDo: safePkg01 test had its output updated, but the fix is not really right:
the rest of the dependencies are truncated due to the fact the we're only
grepping a single line, but ghc-pkg is wrapping its output.
ToDo: In a later commit, update all submodules to stop using -package-name
and use -this-package-key. For now, we don't do it to avoid submodule
explosion.
Signed-off-by: Edward Z. Yang <ezyang@cs.stanford.edu>
Test Plan: validate
Reviewers: simonpj, simonmar, hvr, austin
Subscribers: simonmar, relrod, carter
Differential Revision: https://phabricator.haskell.org/D80
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