Holds toolchains available for a particular exec group. Toolchain targets are accessed by indexing with the toolchain type, as in ctx.toolchains["//pkg:my_toolchain_type"]
. If the toolchain was optional and no toolchain was resolved, this will return None
. Accessing toolchains of an aspect or rule via ctx.toolchains
returns the indexed toolchain as a ToolchainInfo
provider. While when using aspects, ToolchainContext
is also used to hold the toolchains of the base target. It can be accessed by ctx.rule.toolchains["//pkg:my_toolchain_type"]
and it returns the list of providers resulted from applying the aspects on these toolchain targets.
ToolchainContext
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