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-rw-r--r--shell/RULES145
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diff --git a/shell/RULES b/shell/RULES
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index 73c295f..0000000
--- a/shell/RULES
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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"]
- , "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\"."
- ]
- }
- , "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": "reverse"
- , "$1":
- { "type": "nub_right"
- , "$1":
- { "type": "reverse"
- , "$1":
- { "type": "++"
- , "$1":
- [ {"type": "FIELD", "name": "PATH"}
- , { "type": "let*"
- , "bindings": [["provider", "PATH"]]
- , "body":
- {"type": "CALL_EXPRESSION", "name": "base-provides-++"}
- }
- ]
- }
- }
- }
- }
- ]
- ]
- , "body":
- { "type": "RESULT"
- , "provides":
- { "type": "env"
- , "vars": ["TOOLCHAIN", "sh", "NON_SYSTEM_TOOLS", "PATH"]
- }
- }
- }
- }
-}