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Add haskell_toolchains module extension
This extension is used to register the haskell bindists with bzlmod.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,165 @@ | ||
| """ Module extension to install bindist haskell toolchains""" | ||
|
|
||
| load( | ||
| "@rules_haskell//haskell:ghc_bindist.bzl", | ||
| "ghc_bindist", | ||
| "ghc_bindist_toolchain_declaration", | ||
| "ghc_bindists_toolchain_declarations", | ||
| "haskell_register_ghc_bindists", | ||
| ) | ||
|
|
||
| _bindists_tag = tag_class( | ||
| attrs = { | ||
| "version": attr.string( | ||
| doc = "[see rules_haskell_toolchains](toolchain.html#rules_haskell_toolchains-version)", | ||
| ), | ||
| "ghcopts": attr.string_list( | ||
| doc = "[see rules_haskell_toolchains](toolchain.html#rules_haskell_toolchains-ghcopts)", | ||
| ), | ||
| "haddock_flags": attr.string_list( | ||
| doc = "haddock_flags: [see rules_haskell_toolchains](toolchain.html#rules_haskell_toolchains-haddock_flags)", | ||
| ), | ||
| "repl_ghci_args": attr.string_list( | ||
| doc = "[see rules_haskell_toolchains](toolchain.html#rules_haskell_toolchains-repl_ghci_args)", | ||
| ), | ||
| "cabalopts": attr.string_list( | ||
| doc = "[see rules_haskell_toolchains](toolchain.html#rules_haskell_toolchains-cabalopts)", | ||
| ), | ||
| "locale": attr.string( | ||
| doc = "[see rules_haskell_toolchains](toolchain.html#rules_haskell_toolchains-locale)", | ||
| ), | ||
| }, | ||
| doc = """See [rules_haskell_toolchains](toolchain.html#rules_haskell_toolchains). | ||
| Only the first `bindists` tag is taken into account (according to the iteration order over modules). | ||
| """, | ||
| ) | ||
|
|
||
| _bindist_tag = tag_class( | ||
| attrs = { | ||
| "name": attr.string( | ||
| mandatory = True, | ||
| doc = "A unique name for the repository", | ||
| ), | ||
| "version": attr.string( | ||
| mandatory = True, | ||
| doc = "The desired GHC version", | ||
| ), | ||
| "target": attr.string( | ||
| mandatory = True, | ||
| doc = "The desired architecture (See [ghc_bindist_generated.bzl](https://github.com/tweag/rules_haskell/blob/master/haskell/private/ghc_bindist_generated.bzl))", | ||
| ), | ||
| "ghcopts": attr.string_list( | ||
| doc = "[see rules_haskell_toolchains](toolchain.html#rules_haskell_toolchains-ghcopts)", | ||
| ), | ||
| "haddock_flags": attr.string_list( | ||
| doc = "[see rules_haskell_toolchains](toolchain.html#rules_haskell_toolchains-haddock_flags)", | ||
| ), | ||
| "repl_ghci_args": attr.string_list( | ||
| doc = "[see rules_haskell_toolchains](toolchain.html#rules_haskell_toolchains-repl_ghci_args) ", | ||
| ), | ||
| "cabalopts": attr.string_list( | ||
| doc = "[see rules_haskell_toolchains](toolchain.html#rules_haskell_toolchains-cabalopts)", | ||
| ), | ||
| "locale": attr.string( | ||
| doc = "[see rules_haskell_toolchains](toolchain.html#rules_haskell_toolchains-locale)", | ||
| ), | ||
| }, | ||
| doc = "Declares and configure a bindist haskell toolchain. See [ghc_bindist](ghc_bindist.html#ghc_bindist).", | ||
| ) | ||
|
|
||
| def _all_toolchains_impl(rctx): | ||
| content = "\n".join(rctx.attr.toolchains) | ||
| rctx.file("BUILD.bazel", content = content) | ||
|
|
||
| _all_toolchains = repository_rule( | ||
| implementation = _all_toolchains_impl, | ||
| attrs = { | ||
| "toolchains": attr.string_list( | ||
| doc = "All the `toolchain(...)` declarations for the bindist toolchains as string", | ||
| ), | ||
| }, | ||
| doc = """ Used to generate the `all_bindist_toolchains` external repository. | ||
| We can then invoque `register_toolchains("@all_bindist_toolchains//:all")` in the MODULE.bazel file. | ||
| """, | ||
| ) | ||
|
|
||
| def _haskell_toolchains_impl(mctx): | ||
| # We gather the declarations of all the toolchains in the `toolchain_declarations` list | ||
| # in order to write them to the `@all_bindist_toolchains` repository. | ||
|
|
||
| # The code could be simplified a bit by registering aliases to the | ||
| # `toolchain` rules, once the following issue is resolved | ||
| # https://github.com/bazelbuild/bazel/issues/16298 | ||
| toolchain_declarations = [] | ||
|
|
||
| toolchain_names = [] | ||
| found_bindists = False | ||
| for module in mctx.modules: | ||
| for bindist_tag in module.tags.bindist: | ||
| name = "bindist_{}_{}_{}".format(module.name, module.version, bindist_tag.name) | ||
| if name in toolchain_names: | ||
| fail( | ||
| """Module "{module}~{version}" used the "bindist" tag twice with the "{tag_name}" name.""".format( | ||
| tag_name = bindist_tag.name, | ||
| module = module.name, | ||
| version = module.version, | ||
| ), | ||
| ) | ||
| else: | ||
| toolchain_names.append(name) | ||
| ghc_bindist( | ||
| name = name, | ||
| version = bindist_tag.version, | ||
| target = bindist_tag.target, | ||
| ghcopts = bindist_tag.ghcopts, | ||
| haddock_flags = bindist_tag.haddock_flags, | ||
| repl_ghci_args = bindist_tag.repl_ghci_args, | ||
| cabalopts = bindist_tag.cabalopts, | ||
| locale = bindist_tag.locale, | ||
| register = False, | ||
| ) | ||
| toolchain_declarations.append( | ||
| ghc_bindist_toolchain_declaration( | ||
| target = bindist_tag.target, | ||
| bindist_name = name, | ||
| toolchain_name = name, | ||
| ), | ||
| ) | ||
|
|
||
| if len(module.tags.bindists) > 1: | ||
| fail( | ||
| """Module "{module}~{version}" used the "bindists" tag more than once.""".format( | ||
| module = module.name, | ||
| version = module.version, | ||
| ), | ||
| ) | ||
| for bindists_tag in module.tags.bindists: | ||
| # We only consider the first `bindists` tag, because subsequent | ||
| # ones would have the same constraints and lower priority. | ||
| if not found_bindists: | ||
| found_bindists = True | ||
| haskell_register_ghc_bindists( | ||
| version = bindists_tag.version, | ||
| ghcopts = bindists_tag.ghcopts, | ||
| haddock_flags = bindists_tag.haddock_flags, | ||
| repl_ghci_args = bindists_tag.repl_ghci_args, | ||
| cabalopts = bindists_tag.cabalopts, | ||
| locale = bindists_tag.locale, | ||
| register = False, | ||
| ) | ||
| toolchain_declarations.extend( | ||
| ghc_bindists_toolchain_declarations(bindists_tag.version), | ||
| ) | ||
|
|
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| _all_toolchains( | ||
| name = "all_bindist_toolchains", | ||
| toolchains = toolchain_declarations, | ||
| ) | ||
|
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| haskell_toolchains = module_extension( | ||
| implementation = _haskell_toolchains_impl, | ||
| tag_classes = { | ||
| "bindist": _bindist_tag, | ||
| "bindists": _bindists_tag, | ||
| }, | ||
| ) |
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