{ "call rustc":
  { "vars": ["cmd", "inputs", "outs", "out_dirs", "env"]
  , "expression":
    { "type": "ACTION"
    , "outs": {"type": "var", "name": "outs", "default": []}
    , "inputs": {"type": "var", "name": "inputs"}
    , "cmd": {"type": "var", "name": "cmd"}
    , "env": {"type": "var", "name": "env"}
    , "out_dirs": {"type": "var", "name": "out_dirs", "default": []}
    }
  }
, "call rustc artifact":
  { "doc":
    [ "The artifact produced by the calling of the Rust compiler. The"
    , "expression \"call rustc result\" first calls this expression."
    ]
  , "vars":
    [ "crate_root"
    , "crate_name"
    , "deps"
    , "crate_type"
    , "srcs"
    , "edition"
    , "cargo_features"
    , "stage"
    , "build_script"
    , "emit"
    , "rmeta"
    , "runner"
    , "transition"
    , "deps-transition"
    , "version"
    , "test"
    , "defaults"
    , "pkg_name"
    , "ENV"
    ]
  , "imports":
    { "call rustc": "call rustc"
    , "disjoint_map_from_provides": ["./", "..", "disjoint_map_from_provides"]
    , "flatten_from_provides": ["./", "..", "flatten_from_provides"]
    , "for host": "for host"
    , "get_artifacts": ["./", "..", "get_artifacts"]
    , "get_runfiles": ["./", "..", "get_runfiles"]
    , "get_unique_artifact": ["./", "..", "get_unique_artifact"]
    }
  , "expression":
    { "type": "let*"
    , "bindings":
      [ [ "crate_root"
        , { "type": "let*"
          , "bindings":
            [ [ "transition"
              , { "type": "var"
                , "name": "transition"
                , "default": {"type": "empty_map"}
                }
              ]
            , ["field_name", "crate_root"]
            , ["field_content", {"type": "var", "name": "crate_root"}]
            ]
          , "body": {"type": "CALL_EXPRESSION", "name": "get_unique_artifact"}
          }
        ]
      , [ "crate_root_name"
        , { "type": "join"
          , "$1": {"type": "keys", "$1": {"type": "var", "name": "crate_root"}}
          }
        ]
      , [ "crate_name"
        , {"type": "join", "$1": {"type": "var", "name": "crate_name"}}
        ]
      , [ "srcs"
        , { "type": "let*"
          , "bindings":
            [ [ "transition"
              , { "type": "var"
                , "name": "transition"
                , "default": {"type": "empty_map"}
                }
              ]
            , ["field_content", {"type": "var", "name": "srcs"}]
            ]
          , "body": {"type": "CALL_EXPRESSION", "name": "get_artifacts"}
          }
        ]
      , [ "c-deps"
        , { "type": "let*"
          , "bindings":
            [ [ "transition"
              , { "type": "var"
                , "name": "deps-transition"
                , "default": {"type": "empty_map"}
                }
              ]
            , ["field_content", {"type": "var", "name": "deps"}]
            , [ "artifacts"
              , {"type": "CALL_EXPRESSION", "name": "get_artifacts"}
              ]
            , ["runfiles", {"type": "CALL_EXPRESSION", "name": "get_runfiles"}]
            , ["range", {"type": "var", "name": "deps"}]
            , [ "compile-deps"
              , { "type": "let*"
                , "bindings": [["key", "compile-deps"]]
                , "body":
                  { "type": "CALL_EXPRESSION"
                  , "name": "disjoint_map_from_provides"
                  }
                }
              ]
            , [ "link-deps"
              , { "type": "let*"
                , "bindings": [["key", "link-deps"]]
                , "body":
                  { "type": "CALL_EXPRESSION"
                  , "name": "disjoint_map_from_provides"
                  }
                }
              ]
            ]
          , "body":
            { "type": "map_union"
            , "$1":
              [ {"type": "var", "name": "runfiles"}
              , {"type": "var", "name": "artifacts"}
              , {"type": "var", "name": "compile-deps"}
              , {"type": "var", "name": "link-deps"}
              ]
            }
          }
        ]
      , [ "run-libs"
        , { "type": "let*"
          , "bindings":
            [ [ "transition"
              , { "type": "var"
                , "name": "deps-transition"
                , "default": {"type": "empty_map"}
                }
              ]
            , ["range", {"type": "var", "name": "deps"}]
            , ["key", "run-libs"]
            ]
          , "body":
            {"type": "CALL_EXPRESSION", "name": "disjoint_map_from_provides"}
          }
        ]
      , [ "c-deps-link-args"
        , { "type": "let*"
          , "bindings":
            [ ["range", {"type": "var", "name": "deps"}]
            , [ "transition"
              , { "type": "var"
                , "name": "deps-transition"
                , "default": {"type": "empty_map"}
                }
              ]
            , ["key", "link-args"]
            ]
          , "body":
            {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
          }
        ]
      , [ "c-deps-run-libs-args"
        , { "type": "let*"
          , "bindings":
            [ [ "transition"
              , { "type": "var"
                , "name": "deps-transition"
                , "default": {"type": "empty_map"}
                }
              ]
            , ["range", {"type": "var", "name": "deps"}]
            , ["key", "run-libs-args"]
            ]
          , "body":
            {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
          }
        ]
      , [ "range"
        , { "type": "++"
          , "$1":
            [ {"type": "var", "name": "deps"}
            , {"type": "var", "name": "cargo_features"}
            , {"type": "var", "name": "build_script", "default": []}
            ]
          }
        ]
      , [ "compile-deps"
        , { "type": "map_union"
          , "$1":
            [ {"type": "var", "name": "c-deps"}
            , {"type": "var", "name": "run-libs"}
            , { "type": "let*"
              , "bindings":
                [ [ "transition"
                  , { "type": "var"
                    , "name": "deps-transition"
                    , "default": {"type": "empty_map"}
                    }
                  ]
                , ["key", "rust-compile-artifacts"]
                ]
              , "body":
                { "type": "CALL_EXPRESSION"
                , "name": "disjoint_map_from_provides"
                }
              }
            ]
          }
        ]
      , [ "link-deps"
        , { "type": "map_union"
          , "$1":
            [ {"type": "var", "name": "c-deps"}
            , {"type": "var", "name": "run-libs"}
            , { "type": "let*"
              , "bindings":
                [ [ "transition"
                  , { "type": "var"
                    , "name": "deps-transition"
                    , "default": {"type": "empty_map"}
                    }
                  ]
                , ["key", "rust-link-artifacts"]
                ]
              , "body":
                { "type": "CALL_EXPRESSION"
                , "name": "disjoint_map_from_provides"
                }
              }
            ]
          }
        ]
      , [ "compile-deps-args"
        , { "type": "let*"
          , "bindings":
            [ [ "transition"
              , { "type": "var"
                , "name": "deps-transition"
                , "default": {"type": "empty_map"}
                }
              ]
            , ["key", "rustc-compile-args"]
            ]
          , "body":
            {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
          }
        ]
      , [ "link-deps-args"
        , { "type": "let*"
          , "bindings":
            [ [ "transition"
              , { "type": "var"
                , "name": "deps-transition"
                , "default": {"type": "empty_map"}
                }
              ]
            , ["key", "rustc-link-args"]
            ]
          , "body":
            {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
          }
        ]
      , [ "stage-deps-args"
        , { "type": "let*"
          , "bindings":
            [ [ "transition"
              , { "type": "var"
                , "name": "deps-transition"
                , "default": {"type": "empty_map"}
                }
              ]
            , ["key", "stage-args"]
            ]
          , "body":
            {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
          }
        ]
      , [ "stage-deps-args-with-flags"
        , { "type": "++"
          , "$1":
            { "type": "foreach"
            , "var": "x"
            , "range": {"type": "var", "name": "stage-deps-args"}
            , "body":
              { "type": "++"
              , "$1":
                { "type": "if"
                , "cond": {"type": "var", "name": "x"}
                , "then": [["-L", {"type": "var", "name": "x"}]]
                }
              , "else": []
              }
            }
          }
        ]
      , ["range", {"type": "var", "name": "defaults"}]
      , [ "transition"
        , { "type": "var"
          , "name": "transition"
          , "default": {"type": "empty_map"}
          }
        ]
      , [ "TARGET"
        , { "type": "join"
          , "$1":
            { "type": "let*"
            , "bindings": [["key", "TARGET"]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
            }
          }
        ]
      , [ "HOST"
        , { "type": "join"
          , "$1":
            { "type": "let*"
            , "bindings": [["key", "HOST"]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
            }
          }
        ]
      , [ "RUSTC"
        , { "type": "join"
          , "$1":
            { "type": "let*"
            , "bindings": [["key", "RUSTC"]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
            }
          }
        ]
      , [ "RUSTC_FLAGS"
        , { "type": "let*"
          , "bindings": [["key", "RUSTC_FLAGS"]]
          , "body":
            {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
          }
        ]
      , [ "ADD_RUSTC_FLAGS"
        , { "type": "let*"
          , "bindings": [["key", "ADD_RUSTC_FLAGS"]]
          , "body":
            {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
          }
        ]
      , [ "PATH"
        , { "type": "join"
          , "$1":
            { "type": "let*"
            , "bindings": [["key", "PATH"]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
            }
          , "separator": ":"
          }
        ]
      , [ "CARGO_CFG_TARGET_ARCH"
        , { "type": "join"
          , "$1":
            { "type": "let*"
            , "bindings": [["key", "CARGO_CFG_TARGET_ARCH"]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
            }
          }
        ]
      , [ "CARGO_CFG_TARGET_ENDIAN"
        , { "type": "join"
          , "$1":
            { "type": "let*"
            , "bindings": [["key", "CARGO_CFG_TARGET_ENDIAN"]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
            }
          }
        ]
      , [ "CARGO_CFG_TARGET_ENV"
        , { "type": "join"
          , "$1":
            { "type": "let*"
            , "bindings": [["key", "CARGO_CFG_TARGET_ENV"]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
            }
          }
        ]
      , [ "CARGO_CFG_TARGET_FAMILY"
        , { "type": "join"
          , "$1":
            { "type": "let*"
            , "bindings": [["key", "CARGO_CFG_TARGET_FAMILY"]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
            }
          }
        ]
      , [ "CARGO_CFG_TARGET_FEATURE"
        , { "type": "join"
          , "$1":
            { "type": "let*"
            , "bindings": [["key", "CARGO_CFG_TARGET_FEATURE"]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
            }
          , "separator": ","
          }
        ]
      , [ "CARGO_CFG_TARGET_HAS_ATOMIC"
        , { "type": "join"
          , "$1":
            { "type": "let*"
            , "bindings": [["key", "CARGO_CFG_TARGET_HAS_ATOMIC"]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
            }
          , "separator": ","
          }
        ]
      , [ "CARGO_CFG_TARGET_OS"
        , { "type": "join"
          , "$1":
            { "type": "let*"
            , "bindings": [["key", "CARGO_CFG_TARGET_OS"]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
            }
          }
        ]
      , [ "CARGO_CFG_TARGET_POINTER_WIDTH"
        , { "type": "join"
          , "$1":
            { "type": "let*"
            , "bindings": [["key", "CARGO_CFG_TARGET_POINTER_WIDTH"]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
            }
          }
        ]
      , [ "CARGO_CFG_TARGET_VENDOR"
        , { "type": "join"
          , "$1":
            { "type": "let*"
            , "bindings": [["key", "CARGO_CFG_TARGET_VENDOR"]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
            }
          }
        ]
      , [ "CARGO_CFG_UNIX"
        , { "type": "join"
          , "$1":
            { "type": "let*"
            , "bindings": [["key", "CARGO_CFG_UNIX"]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
            }
          }
        ]
      , [ "CARGO_CFG_WINDOWS"
        , { "type": "join"
          , "$1":
            { "type": "let*"
            , "bindings": [["key", "CARGO_CFG_WINDOWS"]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
            }
          }
        ]
      , [ "CARGO_ENCODED_RUSTFLAGS"
        , { "type": "join"
          , "$1":
            { "type": "let*"
            , "bindings": [["key", "CARGO_ENCODED_RUSTFLAGS"]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "flatten_from_provides"}
            }
          }
        ]
      , [ "edition"
        , { "type": "if"
          , "cond": {"type": "var", "name": "edition"}
          , "then": {"type": "join", "$1": {"type": "var", "name": "edition"}}
          , "else": "2015"
          }
        ]
      , [ "cmd"
        , [ "sh"
          , "-c"
          , { "type": "join"
            , "$1":
              [ { "type": "join_cmd"
                , "$1":
                  { "type": "++"
                  , "$1":
                    [ [ { "type": "var"
                        , "name": "runner"
                        , "default": {"type": "var", "name": "RUSTC"}
                        }
                      , {"type": "var", "name": "crate_root_name"}
                      , "--crate-name"
                      , {"type": "var", "name": "crate_name"}
                      , "--crate-type"
                      , {"type": "var", "name": "crate_type"}
                      , "--emit"
                      , {"type": "var", "name": "emit"}
                      , "--edition"
                      , {"type": "var", "name": "edition"}
                      , "--out-dir"
                      , {"type": "var", "name": "stage"}
                      ]
                    , {"type": "var", "name": "stage-deps-args-with-flags"}
                    , {"type": "var", "name": "RUSTC_FLAGS"}
                    , {"type": "var", "name": "ADD_RUSTC_FLAGS"}
                    , { "type": "if"
                      , "cond": {"type": "var", "name": "TARGET"}
                      , "then": ["--target", {"type": "var", "name": "TARGET"}]
                      , "else": []
                      }
                    , { "type": "if"
                      , "cond": {"type": "var", "name": "LINKER"}
                      , "then":
                        [ "-C"
                        , { "type": "join"
                          , "$1":
                            ["linker=", {"type": "var", "name": "LINKER"}]
                          }
                        ]
                      , "else": []
                      }
                    , { "type": "if"
                      , "cond": {"type": "var", "name": "test"}
                      , "then": ["--test"]
                      , "else": []
                      }
                    , { "type": "case"
                      , "case":
                        { "bin": {"type": "var", "name": "link-deps-args"}
                        , "cdylib": {"type": "var", "name": "link-deps-args"}
                        , "dylib": {"type": "var", "name": "link-deps-args"}
                        , "proc-macro":
                          {"type": "var", "name": "link-deps-args"}
                        , "rlib": {"type": "var", "name": "compile-deps-args"}
                        , "staticlib":
                          {"type": "var", "name": "link-deps-args"}
                        }
                      , "expr": {"type": "var", "name": "crate_type"}
                      }
                    , { "type": "if"
                      , "cond":
                        { "type": "=="
                        , "$1": {"type": "var", "name": "crate_type"}
                        , "$2": "proc-macro"
                        }
                      , "then": ["--extern", "proc_macro"]
                      , "else": []
                      }
                    , { "type": "if"
                      , "cond": {"type": "var", "name": "c-deps-link-args"}
                      , "then":
                        { "type": "let*"
                        , "bindings":
                          [ [ "args"
                            , { "type": "++"
                              , "$1":
                                [ ["-Clink-arg=-Wl"]
                                , {"type": "var", "name": "c-deps-link-args"}
                                ]
                              }
                            ]
                          ]
                        , "body":
                          [ { "type": "join"
                            , "$1": {"type": "var", "name": "args"}
                            , "separator": ","
                            }
                          ]
                        }
                      , "else": []
                      }
                    , { "type": "if"
                      , "cond": {"type": "var", "name": "c-deps-run-libs-args"}
                      , "then":
                        { "type": "let*"
                        , "bindings":
                          [ [ "args"
                            , { "type": "++"
                              , "$1":
                                [ ["-Clink-arg=-Wl"]
                                , { "type": "var"
                                  , "name": "c-deps-run-libs-args"
                                  }
                                ]
                              }
                            ]
                          ]
                        , "body":
                          [ { "type": "join"
                            , "$1": {"type": "var", "name": "args"}
                            , "separator": ","
                            }
                          ]
                        }
                      , "else": []
                      }
                    ]
                  }
                }
              , "--remap-path-prefix"
              , "\"${PWD}=\""
              ]
            , "separator": " "
            }
          ]
        ]
      , [ "inputs"
        , { "type": "map_union"
          , "$1":
            [ {"type": "var", "name": "crate_root"}
            , {"type": "var", "name": "srcs"}
            , { "type": "case"
              , "case":
                { "bin": {"type": "var", "name": "link-deps"}
                , "cdylib": {"type": "var", "name": "link-deps"}
                , "dylib": {"type": "var", "name": "link-deps"}
                , "proc-macro": {"type": "var", "name": "link-deps"}
                , "rlib": {"type": "var", "name": "compile-deps"}
                , "staticlib": {"type": "var", "name": "link-deps"}
                }
              , "expr": {"type": "var", "name": "crate_type"}
              }
            ]
          }
        ]
      , [ "outs"
        , { "type": "if"
          , "cond": {"type": "var", "name": "rmeta"}
          , "then":
            [ { "type": "join"
              , "$1":
                [ {"type": "var", "name": "stage"}
                , { "type": "join"
                  , "$1":
                    ["lib", {"type": "var", "name": "crate_name"}, ".rmeta"]
                  , "separator": ""
                  }
                ]
              , "separator": "/"
              }
            ]
          , "else":
            { "type": "case"
            , "case":
              { "bin":
                [ { "type": "join"
                  , "$1":
                    [ {"type": "var", "name": "stage"}
                    , {"type": "var", "name": "crate_name"}
                    ]
                  , "separator": "/"
                  }
                ]
              , "cdylib":
                [ { "type": "join"
                  , "$1":
                    [ {"type": "var", "name": "stage"}
                    , { "type": "join"
                      , "$1":
                        ["lib", {"type": "var", "name": "crate_name"}, ".so"]
                      , "separator": ""
                      }
                    ]
                  , "separator": "/"
                  }
                ]
              , "dylib":
                [ { "type": "join"
                  , "$1":
                    [ {"type": "var", "name": "stage"}
                    , { "type": "join"
                      , "$1":
                        ["lib", {"type": "var", "name": "crate_name"}, ".so"]
                      , "separator": ""
                      }
                    ]
                  , "separator": "/"
                  }
                ]
              , "proc-macro":
                [ { "type": "join"
                  , "$1":
                    [ {"type": "var", "name": "stage"}
                    , { "type": "join"
                      , "$1":
                        ["lib", {"type": "var", "name": "crate_name"}, ".so"]
                      , "separator": ""
                      }
                    ]
                  , "separator": "/"
                  }
                ]
              , "rlib":
                [ { "type": "join"
                  , "$1":
                    [ {"type": "var", "name": "stage"}
                    , { "type": "join"
                      , "$1":
                        ["lib", {"type": "var", "name": "crate_name"}, ".rlib"]
                      , "separator": ""
                      }
                    ]
                  , "separator": "/"
                  }
                ]
              , "staticlib":
                [ { "type": "join"
                  , "$1":
                    [ {"type": "var", "name": "stage"}
                    , { "type": "join"
                      , "$1":
                        ["lib", {"type": "var", "name": "crate_name"}, ".a"]
                      , "separator": ""
                      }
                    ]
                  , "separator": "/"
                  }
                ]
              }
            , "expr": {"type": "var", "name": "crate_type"}
            }
          }
        ]
      , ["OUT_DIR", {"type": "var", "name": "stage"}]
      , [ "TARGET"
        , { "type": "if"
          , "cond": {"type": "var", "name": "TARGET"}
          , "then": {"type": "var", "name": "TARGET"}
          , "else": ""
          }
        ]
      , [ "HOST"
        , { "type": "if"
          , "cond": {"type": "var", "name": "HOST"}
          , "then": {"type": "var", "name": "HOST"}
          , "else": ""
          }
        ]
      , [ "CARGO_PKG_VERSION"
        , { "type": "join"
          , "$1": {"type": "var", "name": "version", "default": []}
          , "separator": "."
          }
        ]
      , [ "CARGO_PKG_VERSION_MAJOR"
        , { "type": "[]"
          , "index": 0
          , "list": {"type": "var", "name": "version", "default": []}
          , "default": ""
          }
        ]
      , [ "CARGO_PKG_VERSION_MINOR"
        , { "type": "[]"
          , "index": 1
          , "list": {"type": "var", "name": "version", "default": []}
          , "default": ""
          }
        ]
      , [ "CARGO_PKG_VERSION_PATCH"
        , { "type": "[]"
          , "index": 2
          , "list": {"type": "var", "name": "version", "default": []}
          , "default": ""
          }
        ]
      , [ "CARGO_PKG_NAME"
        , {"type": "join", "$1": {"type": "var", "name": "pkg_name"}}
        ]
      , [ "env"
        , { "type": "map_union"
          , "$1":
            [ { "type": "env"
              , "vars":
                [ "RUSTC"
                , "PATH"
                , "OUT_DIR"
                , "HOST"
                , "TARGET"
                , "CARGO_PKG_NAME"
                , "CARGO_PKG_VERSION"
                , "CARGO_PKG_VERSION_MAJOR"
                , "CARGO_PKG_VERSION_MINOR"
                , "CARGO_PKG_VERSION_PATCH"
                ]
              }
            , { "type": "if"
              , "cond": {"type": "var", "name": "CARGO_CFG_TARGET_ARCH"}
              , "then":
                { "type": "singleton_map"
                , "key": "CARGO_CFG_TARGET_ARCH"
                , "value": {"type": "var", "name": "CARGO_CFG_TARGET_ARCH"}
                }
              , "else": {"type": "empty_map"}
              }
            , { "type": "if"
              , "cond": {"type": "var", "name": "CARGO_CFG_TARGET_ENDIAN"}
              , "then":
                { "type": "singleton_map"
                , "key": "CARGO_CFG_TARGET_ENDIAN"
                , "value": {"type": "var", "name": "CARGO_CFG_TARGET_ENDIAN"}
                }
              , "else": {"type": "empty_map"}
              }
            , { "type": "if"
              , "cond": {"type": "var", "name": "CARGO_CFG_TARGET_ENV"}
              , "then":
                { "type": "singleton_map"
                , "key": "CARGO_CFG_TARGET_ENV"
                , "value": {"type": "var", "name": "CARGO_CFG_TARGET_ENV"}
                }
              , "else": {"type": "empty_map"}
              }
            , { "type": "if"
              , "cond": {"type": "var", "name": "CARGO_CFG_TARGET_FAMILY"}
              , "then":
                { "type": "singleton_map"
                , "key": "CARGO_CFG_TARGET_FAMILY"
                , "value": {"type": "var", "name": "CARGO_CFG_TARGET_FAMILY"}
                }
              , "else": {"type": "empty_map"}
              }
            , { "type": "if"
              , "cond": {"type": "var", "name": "CARGO_CFG_TARGET_FEATURE"}
              , "then":
                { "type": "singleton_map"
                , "key": "CARGO_CFG_TARGET_FEATURE"
                , "value": {"type": "var", "name": "CARGO_CFG_TARGET_FEATURE"}
                }
              , "else": {"type": "empty_map"}
              }
            , { "type": "if"
              , "cond": {"type": "var", "name": "CARGO_CFG_TARGET_HAS_ATOMIC"}
              , "then":
                { "type": "singleton_map"
                , "key": "CARGO_CFG_TARGET_HAS_ATOMIC"
                , "value":
                  {"type": "var", "name": "CARGO_CFG_TARGET_HAS_ATOMIC"}
                }
              , "else": {"type": "empty_map"}
              }
            , { "type": "if"
              , "cond": {"type": "var", "name": "CARGO_CFG_TARGET_OS"}
              , "then":
                { "type": "singleton_map"
                , "key": "CARGO_CFG_TARGET_OS"
                , "value": {"type": "var", "name": "CARGO_CFG_TARGET_OS"}
                }
              , "else": {"type": "empty_map"}
              }
            , { "type": "if"
              , "cond":
                {"type": "var", "name": "CARGO_CFG_TARGET_POINTER_WIDTH"}
              , "then":
                { "type": "singleton_map"
                , "key": "CARGO_CFG_TARGET_POINTER_WIDTH"
                , "value":
                  {"type": "var", "name": "CARGO_CFG_TARGET_POINTER_WIDTH"}
                }
              , "else": {"type": "empty_map"}
              }
            , { "type": "if"
              , "cond": {"type": "var", "name": "CARGO_CFG_TARGET_VENDOR"}
              , "then":
                { "type": "singleton_map"
                , "key": "CARGO_CFG_TARGET_VENDOR"
                , "value": {"type": "var", "name": "CARGO_CFG_TARGET_VENDOR"}
                }
              , "else": {"type": "empty_map"}
              }
            , { "type": "if"
              , "cond": {"type": "var", "name": "CARGO_CFG_UNIX"}
              , "then":
                { "type": "singleton_map"
                , "key": "CARGO_CFG_UNIX"
                , "value": {"type": "var", "name": "CARGO_CFG_UNIX"}
                }
              , "else": {"type": "empty_map"}
              }
            , { "type": "if"
              , "cond": {"type": "var", "name": "CARGO_CFG_WINDOWS"}
              , "then":
                { "type": "singleton_map"
                , "key": "CARGO_CFG_WINDOWS"
                , "value": {"type": "var", "name": "CARGO_CFG_WINDOWS"}
                }
              , "else": {"type": "empty_map"}
              }
            , {"type": "var", "name": "ENV", "default": {"type": "empty_map"}}
            ]
          }
        ]
      , ["artifact", {"type": "CALL_EXPRESSION", "name": "call rustc"}]
      , [ "artifact-name"
        , {"type": "join", "$1": {"type": "var", "name": "outs"}}
        ]
      ]
    , "body":
      { "type": "map_union"
      , "$1":
        [ { "type": "env"
          , "vars":
            [ "artifact"
            , "artifact-name"
            , "stage-args"
            , "link-deps"
            , "compile-deps"
            , "stage-deps-args"
            , "run-libs"
            , "c-deps-link-args"
            , "c-deps-run-libs-args"
            ]
          }
        , { "type": "singleton_map"
          , "key": "env"
          , "value": {"type": "var", "name": "env"}
          }
        ]
      }
    }
  }
, "call rustc result":
  { "doc": ["The RESULT from the invocation of rustc."]
  , "vars":
    [ "crate_root"
    , "crate_name"
    , "deps"
    , "crate_type"
    , "srcs"
    , "edition"
    , "cargo_features"
    , "stage"
    , "build_script"
    , "transition"
    , "deps-transition"
    , "version"
    , "defaults"
    , "pkg_name"
    , "c_hdrs"
    , "ENV"
    ]
  , "imports":
    { "call rustc artifact": "call rustc artifact"
    , "stage_unique_artifact": ["./", "..", "stage_unique_artifact"]
    }
  , "expression":
    { "type": "let*"
    , "bindings":
      [ ["emit", "metadata,link"]
      , [ "rmeta result"
        , { "type": "if"
          , "cond":
            { "type": "=="
            , "$1": {"type": "var", "name": "crate_type"}
            , "$2": "bin"
            }
          , "then": {"type": "empty_map"}
          , "else":
            { "type": "let*"
            , "bindings": [["rmeta", true]]
            , "body":
              {"type": "CALL_EXPRESSION", "name": "call rustc artifact"}
            }
          }
        ]
      , [ "link result"
        , {"type": "CALL_EXPRESSION", "name": "call rustc artifact"}
        ]
      , ["emit", "metadata,link"]
      , [ "crate_name"
        , {"type": "join", "$1": {"type": "var", "name": "crate_name"}}
        ]
      , [ "stage_args"
        , { "type": "++"
          , "$1":
            [ [{"type": "var", "name": "stage"}]
            , { "type": "lookup"
              , "key": "stage-deps-args"
              , "map": {"type": "var", "name": "link result"}
              }
            ]
          }
        ]
      , [ "link_arg_rmeta"
        , { "type": "cond"
          , "cond":
            [ [ { "type": "=="
                , "$1": {"type": "var", "name": "crate_type"}
                , "$2": "bin"
                }
              , []
              ]
            , [ true
              , { "type": "++"
                , "$1":
                  [ [ "--extern"
                    , { "type": "join"
                      , "$1":
                        [ {"type": "var", "name": "crate_name"}
                        , "="
                        , { "type": "lookup"
                          , "key": "artifact-name"
                          , "map": {"type": "var", "name": "rmeta result"}
                          }
                        ]
                      }
                    ]
                  ]
                }
              ]
            ]
          }
        ]
      , [ "link_arg_rlib"
        , { "type": "cond"
          , "cond":
            [ [ { "type": "=="
                , "$1": {"type": "var", "name": "crate_type"}
                , "$2": "bin"
                }
              , []
              ]
            , [ true
              , { "type": "++"
                , "$1":
                  [ [ "--extern"
                    , { "type": "join"
                      , "$1":
                        [ {"type": "var", "name": "crate_name"}
                        , "="
                        , { "type": "lookup"
                          , "key": "artifact-name"
                          , "map": {"type": "var", "name": "link result"}
                          }
                        ]
                      }
                    ]
                  ]
                }
              ]
            ]
          }
        ]
      , [ "run-libs-map"
        , { "type": "singleton_map"
          , "key": "run-libs"
          , "value":
            { "type": "map_union"
            , "$1":
              [ { "type": "lookup"
                , "key": "run-libs"
                , "map": {"type": "var", "name": "link result"}
                }
              , { "type": "case"
                , "case":
                  { "bin": {"type": "empty_map"}
                  , "cdylib":
                    { "type": "lookup"
                    , "key": "artifact"
                    , "map": {"type": "var", "name": "link result"}
                    }
                  , "dylib":
                    { "type": "lookup"
                    , "key": "artifact"
                    , "map": {"type": "var", "name": "link result"}
                    }
                  , "proc-macro": {"type": "empty_map"}
                  , "rlib": {"type": "empty_map"}
                  , "staticlib": {"type": "empty_map"}
                  }
                , "expr": {"type": "var", "name": "crate_type"}
                }
              ]
            }
          }
        ]
      ]
    , "body":
      { "type": "RESULT"
      , "artifacts":
        { "type": "map_union"
        , "$1":
          [ { "type": "lookup"
            , "key": "artifact"
            , "map": {"type": "var", "name": "link result"}
            }
          ]
        }
      , "runfiles":
        {"type": "var", "name": "c_hdrs", "default": {"type": "empty_map"}}
      , "provides":
        { "type": "cond"
        , "cond":
          [ [ { "type": "=="
              , "$1": {"type": "var", "name": "crate_type"}
              , "$2": "bin"
              }
            , {"type": "var", "name": "run-libs-map"}
            ]
          , [ true
            , { "type": "map_union"
              , "$1":
                [ {"type": "var", "name": "run-libs-map"}
                , { "type": "singleton_map"
                  , "key": "rust-compile-artifacts"
                  , "value":
                    { "type": "if"
                    , "cond":
                      { "type": "=="
                      , "$1": {"type": "var", "name": "crate_type"}
                      , "$2": "proc-macro"
                      }
                    , "then":
                      { "type": "map_union"
                      , "$1":
                        [ { "type": "lookup"
                          , "key": "artifact"
                          , "map": {"type": "var", "name": "link result"}
                          }
                        , { "type": "lookup"
                          , "key": "link-deps"
                          , "map": {"type": "var", "name": "link result"}
                          }
                        ]
                      }
                    , "else":
                      { "type": "map_union"
                      , "$1":
                        [ { "type": "lookup"
                          , "key": "artifact"
                          , "map": {"type": "var", "name": "rmeta result"}
                          }
                        , { "type": "lookup"
                          , "key": "compile-deps"
                          , "map": {"type": "var", "name": "rmeta result"}
                          }
                        ]
                      }
                    }
                  }
                , { "type": "singleton_map"
                  , "key": "rust-link-artifacts"
                  , "value":
                    { "type": "map_union"
                    , "$1":
                      [ { "type": "lookup"
                        , "key": "artifact"
                        , "map": {"type": "var", "name": "link result"}
                        }
                      , { "type": "lookup"
                        , "key": "link-deps"
                        , "map": {"type": "var", "name": "link result"}
                        }
                      ]
                    }
                  }
                , { "type": "singleton_map"
                  , "key": "rustc-compile-args"
                  , "value":
                    { "type": "if"
                    , "cond":
                      { "type": "=="
                      , "$1": {"type": "var", "name": "crate_type"}
                      , "$2": "proc-macro"
                      }
                    , "then":
                      { "type": "++"
                      , "$1": [{"type": "var", "name": "link_arg_rlib"}]
                      }
                    , "else":
                      { "type": "++"
                      , "$1": [{"type": "var", "name": "link_arg_rmeta"}]
                      }
                    }
                  }
                , { "type": "singleton_map"
                  , "key": "rustc-link-args"
                  , "value":
                    { "type": "++"
                    , "$1": [{"type": "var", "name": "link_arg_rlib"}]
                    }
                  }
                , { "type": "singleton_map"
                  , "key": "stage-args"
                  , "value":
                    { "type": "nub_right"
                    , "$1":
                      { "type": "++"
                      , "$1":
                        [ [{"type": "var", "name": "stage"}]
                        , { "type": "lookup"
                          , "key": "stage-deps-args"
                          , "map": {"type": "var", "name": "link result"}
                          }
                        ]
                      }
                    }
                  }
                , { "type": "if"
                  , "cond":
                    { "type": "=="
                    , "$1": {"type": "var", "name": "crate_type"}
                    , "$2": "cdylib"
                    }
                  , "then":
                    { "type": "let*"
                    , "bindings":
                      [ [ "basename"
                        , { "type": "basename"
                          , "$1":
                            { "type": "lookup"
                            , "key": "artifact-name"
                            , "map": {"type": "var", "name": "link result"}
                            }
                          }
                        ]
                      , [ "run-libs"
                        , { "type": "singleton_map"
                          , "key": "run-libs"
                          , "value":
                            { "type": "let*"
                            , "bindings":
                              [ [ "artifact"
                                , { "type": "lookup"
                                  , "key": "artifact"
                                  , "map":
                                    {"type": "var", "name": "link result"}
                                  }
                                ]
                              , ["name", {"type": "var", "name": "basename"}]
                              ]
                            , "body":
                              { "type": "CALL_EXPRESSION"
                              , "name": "stage_unique_artifact"
                              }
                            }
                          }
                        ]
                      , [ "run-libs-args"
                        , { "type": "singleton_map"
                          , "key": "run-libs-args"
                          , "value": [{"type": "var", "name": "basename"}]
                          }
                        ]
                      ]
                    , "body":
                      { "type": "map_union"
                      , "$1":
                        [ {"type": "var", "name": "run-libs"}
                        , {"type": "var", "name": "run-libs-args"}
                        ]
                      }
                    }
                  , "else": {"type": "empty_map"}
                  }
                , { "type": "singleton_map"
                  , "key": "link-args"
                  , "value":
                    { "type": "++"
                    , "$1":
                      [ { "type": "if"
                        , "cond":
                          { "type": "=="
                          , "$1": {"type": "var", "name": "crate_type"}
                          , "$2": "staticlib"
                          }
                        , "then":
                          [ { "type": "lookup"
                            , "key": "artifact-name"
                            , "map": {"type": "var", "name": "link result"}
                            }
                          ]
                        , "else": []
                        }
                      , { "type": "lookup"
                        , "key": "c-deps-link-args"
                        , "map": {"type": "var", "name": "link result"}
                        }
                      , { "type": "lookup"
                        , "key": "c-deps-run-libs-args"
                        , "map": {"type": "var", "name": "link result"}
                        }
                      ]
                    }
                  }
                ]
              }
            ]
          ]
        }
      }
    }
  }
, "for host":
  { "doc": ["Transition to host required while cross-compiling."]
  , "vars": ["ARCH", "HOST_ARCH", "TARGET_ARCH"]
  , "expression":
    { "type": "let*"
    , "bindings":
      [ [ "TARGET_ARCH"
        , { "type": "var"
          , "name": "HOST_ARCH"
          , "default": {"type": "var", "name": "ARCH", "default": ""}
          }
        ]
      ]
    , "body": {"type": "env", "vars": ["TARGET_ARCH"]}
    }
  }
, "for host as rlib":
  { "vars": ["ARCH", "HOST_ARCH", "TARGET_ARCH"]
  , "imports": {"for host": "for host", "to rlib": "to rlib"}
  , "expression":
    { "type": "disjoint_map_union"
    , "$1":
      [ {"type": "CALL_EXPRESSION", "name": "for host"}
      , {"type": "CALL_EXPRESSION", "name": "to rlib"}
      ]
    }
  }
, "to rlib":
  { "doc": ["Transition to rlib required for all rust deps."]
  , "expression":
    { "type": "let*"
    , "bindings": [["RLIB", true]]
    , "body": {"type": "env", "vars": ["RLIB"]}
    }
  }
}