Introduce the swift_common.get_toolchain helper function
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brentleyjones
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This is change 1 of _N_ to migrate the Swift build rules to use new-style Bazel toolchains. This change: * Updates the toolchain configuration rules to wrap the `SwiftToolchainInfo` provider in `platform_common.ToolchainInfo`, for future use by `toolchain()` rules. * Funnels all toolchain access through a new `swift_toolchain.get_toolchain()` function that looks up the toolchain using `ctx.toolchains`, falling back to the implicit attribute. Since `ctx.toolchains` isn't defined yet, the second change is a no-op but it simplifies future parts of the migration. PiperOrigin-RevId: 439638938
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swift_common.get_toolchain helper function
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This is change 1 of _N_ to migrate the Swift build rules to use new-style Bazel toolchains. This change: * Updates the toolchain configuration rules to wrap the `SwiftToolchainInfo` provider in `platform_common.ToolchainInfo`, for future use by `toolchain()` rules. * Funnels all toolchain access through a new `swift_toolchain.get_toolchain()` function that looks up the toolchain using `ctx.toolchains`, falling back to the implicit attribute. Since `ctx.toolchains` isn't defined yet, the second change is a no-op but it simplifies future parts of the migration. PiperOrigin-RevId: 439638938 (cherry picked from commit 884e544) Signed-off-by: Brentley Jones <github@brentleyjones.com>
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This is change 1 of N to migrate the Swift build rules to use new-style Bazel toolchains. This change:
SwiftToolchainInfoprovider inplatform_common.ToolchainInfo, for future use bytoolchain()rules.swift_toolchain.get_toolchain()function that looks up the toolchain usingctx.toolchains, falling back to the implicit attribute.Since
ctx.toolchainsisn't defined yet, the second change is a no-op but it simplifies future parts of the migration.PiperOrigin-RevId: 439638938
(cherry picked from commit 884e544)