65 lines
1.6 KiB
Python
65 lines
1.6 KiB
Python
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"""Derived context with Haskell-specific fields and methods"""
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load("@bazel_skylib//lib:paths.bzl", "paths")
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HaskellContext = provider()
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def haskell_context(ctx, attr = None):
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toolchain = ctx.toolchains["@io_tweag_rules_haskell//haskell:toolchain"]
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if not attr:
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attr = ctx.attr
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if hasattr(attr, "src_strip_prefix"):
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src_strip_prefix = attr.src_strip_prefix
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else:
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src_strip_prefix = ""
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src_root = paths.join(
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ctx.label.workspace_root,
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ctx.label.package,
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src_strip_prefix,
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)
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env = {
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"LANG": toolchain.locale,
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}
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if toolchain.locale_archive != None:
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env["LOCALE_ARCHIVE"] = toolchain.locale_archive.path
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coverage_enabled = False
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if hasattr(ctx, "configuration"):
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coverage_enabled = ctx.configuration.coverage_enabled
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return HaskellContext(
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# Fields
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name = attr.name,
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label = ctx.label,
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toolchain = toolchain,
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tools = toolchain.tools,
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src_root = src_root,
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package_root = ctx.label.workspace_root + ctx.label.package,
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env = env,
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mode = ctx.var["COMPILATION_MODE"],
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actions = ctx.actions,
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bin_dir = ctx.bin_dir,
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genfiles_dir = ctx.genfiles_dir,
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coverage_enabled = coverage_enabled,
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)
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def render_env(env):
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"""Render environment dict to shell exports.
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Example:
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>>> render_env({"PATH": "foo:bar", "LANG": "lang"})
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export PATH=foo:bar
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export LANG=lang
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"""
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return "\n".join([
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"export {}={}".format(k, v)
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for k, v in env.items()
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])
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