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{ "defaults":
{ "doc":
[ "A rule to provide defaults for the usage of the shell"
, ""
, "All targets using invocations of the shell use the target"
, "[\"shel\", \"defaults\"] to determine which shell to use and how to"
, "invoke it. The definition of this default target is probably the only"
, "meaningful use of this rule."
]
, "target_fields": ["base", "toolchain"]
, "string_fields": ["sh", "PATH", "bin dirs"]
, "field_doc":
{ "base": ["Other targets (using the same rule) to inherit values from."]
, "toolchain":
[ "Optional toolchain directory. A collection of artifacts that"
, "form the toolchain, in particular the shell itself, where not taken"
, "from the ambient host environment."
, "Values provided from base are extended."
, "This field is built for the host."
]
, "sh":
[ "The name of the sh binary; if the the field \"toolchain\" is"
, "not empty, the value is interpreted as relative to the toolchain"
, "directory."
]
, "PATH":
[ "Paths for looking up system tools."
, "Specifying this field extends values from \"base\"."
]
, "bin dirs":
[ "Directories of the toolchain that contain additional binaries."
, "Shell-specific rules will add those into PATH."
]
}
, "config_vars": ["ARCH", "HOST_ARCH", "TARGET_ARCH"]
, "imports":
{ "for host": ["transitions", "for host"]
, "artifacts_list": ["", "field_artifacts_list"]
, "base-provides-list": ["CC", "defaults-base-provides-list"]
, "base-provides-++": ["CC", "defaults-base-provides-++"]
, "base-provides": ["CC", "defaults-base-provides"]
}
, "config_transitions":
{"toolchain": [{"type": "CALL_EXPRESSION", "name": "for host"}]}
, "expression":
{ "type": "let*"
, "bindings":
[ [ "TOOLCHAIN"
, { "type": "disjoint_map_union"
, "msg": "toolchain artifacts must not overlap"
, "$1":
{ "type": "++"
, "$1":
[ { "type": "let*"
, "bindings":
[ ["provider", "TOOLCHAIN"]
, ["default", {"type": "empty_map"}]
]
, "body":
{"type": "CALL_EXPRESSION", "name": "base-provides-list"}
}
, { "type": "let*"
, "bindings":
[ ["fieldname", "toolchain"]
, [ "transition"
, {"type": "CALL_EXPRESSION", "name": "for host"}
]
]
, "body": {"type": "CALL_EXPRESSION", "name": "artifacts_list"}
}
]
}
}
]
, [ "sh"
, { "type": "if"
, "cond": {"type": "FIELD", "name": "sh"}
, "then": {"type": "FIELD", "name": "sh"}
, "else":
{ "type": "let*"
, "bindings": [["provider", "sh"]]
, "body": {"type": "CALL_EXPRESSION", "name": "base-provides"}
}
}
]
, [ "NON_SYSTEM_TOOLS"
, { "type": "map_union"
, "$1":
{ "type": "++"
, "$1":
[ [ { "type": "let*"
, "bindings":
[ ["provider", "NON_SYSTEM_TOOLS"]
, ["default", {"type": "empty_map"}]
]
, "body":
{"type": "CALL_EXPRESSION", "name": "base-provides"}
}
]
, { "type": "if"
, "cond": {"type": "FIELD", "name": "sh"}
, "then":
[ { "type": "singleton_map"
, "key": "sh"
, "value":
{ "type": "if"
, "cond": {"type": "FIELD", "name": "toolchain"}
, "then": true
, "else": false
}
}
]
}
]
}
}
]
, [ "PATH"
, { "type": "nub_left"
, "$1":
{ "type": "++"
, "$1":
[ {"type": "FIELD", "name": "PATH"}
, { "type": "let*"
, "bindings": [["provider", "PATH"]]
, "body":
{"type": "CALL_EXPRESSION", "name": "base-provides-++"}
}
]
}
}
]
, [ "bin dirs"
, { "type": "nub_left"
, "$1":
{ "type": "++"
, "$1":
[ {"type": "FIELD", "name": "bin dirs"}
, { "type": "let*"
, "bindings": [["provider", "bin dirs"]]
, "body":
{"type": "CALL_EXPRESSION", "name": "base-provides-++"}
}
]
}
}
]
]
, "body":
{ "type": "RESULT"
, "provides":
{ "type": "env"
, "vars": ["TOOLCHAIN", "sh", "NON_SYSTEM_TOOLS", "PATH", "bin dirs"]
}
}
}
}
}
|
