{ "combined lib":
  { "doc": ["Combine multiple static libraries into a single one."]
  , "target_fields": ["deps"]
  , "string_fields": ["name", "stage"]
  , "config_vars": ["AR", "ENV"]
  , "implicit": {"defaults": [["@", "rules", "CC", "defaults"]]}
  , "field_doc":
    { "name":
      ["The name of the library (without leading \"lib\" or trailing \".a\")."]
    , "deps": ["All libraries (includes transitive) that should be combined."]
    , "stage":
      [ "The logical location of all public headers and the resulting library"
      , "file. Individual directory components are joined with \"/\"."
      ]
    }
  , "config_doc":
    { "AR":
      [ "The archive tool to used for creating the library. If None, the"
      , "respective value from [\"@\", \"rules\", \"CC\", \"defaults\"] will"
      , "be taken."
      ]
    , "ENV": ["The environment for any action generated."]
    }
  , "imports":
    { "compile-deps": ["@", "rules", "CC", "compile-deps"]
    , "compile-args-deps": ["@", "rules", "CC", "compile-args-deps"]
    , "link-deps": ["@", "rules", "CC", "link-deps"]
    , "link-args-deps": ["@", "rules", "CC", "link-args-deps"]
    , "cflags-files-deps": ["@", "rules", "CC", "cflags-files-deps"]
    , "ldflags-files-deps": ["@", "rules", "CC", "ldflags-files-deps"]
    , "default-AR": ["@", "rules", "CC", "default-AR"]
    }
  , "expression":
    { "type": "let*"
    , "bindings":
      [ [ "AR"
        , { "type": "var"
          , "name": "AR"
          , "default": {"type": "CALL_EXPRESSION", "name": "default-AR"}
          }
        ]
      , ["name", {"type": "join", "$1": {"type": "FIELD", "name": "name"}}]
      , [ "stage"
        , { "type": "join"
          , "separator": "/"
          , "$1": {"type": "FIELD", "name": "stage"}
          }
        ]
      , [ "libname"
        , { "type": "join"
          , "$1": ["lib", {"type": "var", "name": "name"}, ".a"]
          }
        ]
      , [ "libpath"
        , { "type": "if"
          , "cond": {"type": "var", "name": "stage"}
          , "then":
            { "type": "join"
            , "separator": "/"
            , "$1":
              [ {"type": "var", "name": "stage"}
              , {"type": "var", "name": "libname"}
              ]
            }
          , "else": {"type": "var", "name": "libname"}
          }
        ]
      , ["deps-fieldnames", ["deps"]]
      , ["compile-deps", {"type": "CALL_EXPRESSION", "name": "compile-deps"}]
      , [ "compile-args"
        , {"type": "CALL_EXPRESSION", "name": "compile-args-deps"}
        ]
      , ["unstaged libs", {"type": "CALL_EXPRESSION", "name": "link-deps"}]
      , [ "libs"
        , { "type": "to_subdir"
          , "subdir": "libs"
          , "$1": {"type": "var", "name": "unstaged libs"}
          }
        ]
      , ["link-deps", {"type": "empty_map"}]
      , [ "link-args-deps"
        , {"type": "CALL_EXPRESSION", "name": "link-args-deps"}
        ]
      , [ "non-lib-link-args-deps"
        , { "type": "++"
          , "$1":
            { "type": "foreach"
            , "var": "arg"
            , "range": {"type": "var", "name": "link-args-deps"}
            , "body":
              { "type": "if"
              , "cond":
                { "type": "lookup"
                , "map": {"type": "var", "name": "unstaged libs"}
                , "key": {"type": "var", "name": "arg"}
                }
              , "then": []
              , "else": [{"type": "var", "name": "arg"}]
              }
            }
          }
        ]
      , [ "link-args"
        , { "type": "++"
          , "$1":
            [ [{"type": "var", "name": "libpath"}]
            , {"type": "var", "name": "non-lib-link-args-deps"}
            ]
          }
        ]
      , [ "ldflags-files"
        , {"type": "CALL_EXPRESSION", "name": "ldflags-files-deps"}
        ]
      , [ "cflags-files"
        , {"type": "CALL_EXPRESSION", "name": "cflags-files-deps"}
        ]
      , [ "package"
        , { "type": "let*"
          , "bindings": [["name", {"type": "var", "name": "name"}]]
          , "body":
            {"type": "env", "vars": ["name", "cflags-files", "ldflags-files"]}
          }
        ]
      , [ "combine.sh"
        , { "type": "singleton_map"
          , "key": "combine.sh"
          , "value":
            { "type": "BLOB"
            , "data":
              { "type": "join"
              , "separator": "\n"
              , "$1":
                [ "set -eu"
                , "readonly ROOT=$(pwd)"
                , "readonly AR=$1"
                , "readonly OUT=$2"
                , "shift 2"
                , "for l in $@; do"
                , "  OUTDIR=${ROOT}/objs/$l"
                , "  mkdir -p $OUTDIR"
                , "  cd $OUTDIR"
                , "  $AR -t $ROOT/$l | sort | uniq -c | sed -e 's/^\\s*//' > obj.list"
                , "  NUM=$(wc -l obj.list | cut -d' ' -f1)"
                , "  for o in $(seq 1 $NUM); do"
                , "    CNT=$(sed ''$o'q;d' obj.list | cut -d' ' -f1)"
                , "    OBJ=$(sed ''$o'q;d' obj.list | cut -d' ' -f2)"
                , "    for i in $(seq 1 $CNT); do"
                , "      mkdir -p $i"
                , "      $AR -xN $i $ROOT/$l $OBJ"
                , "      mv *.o $i/"
                , "    done"
                , "  done"
                , "  cd - >/dev/null"
                , "  $AR -qc $OUT $(find $OUTDIR -type f -name *.o | sort)"
                , "done"
                , "$AR s $OUT"
                ]
              }
            }
          }
        ]
      , [ "combined lib"
        , { "type": "ACTION"
          , "outs": [{"type": "var", "name": "libname"}]
          , "inputs":
            { "type": "disjoint_map_union"
            , "$1":
              [ {"type": "var", "name": "libs"}
              , {"type": "var", "name": "combine.sh"}
              ]
            }
          , "cmd":
            { "type": "++"
            , "$1":
              [ [ "sh"
                , "combine.sh"
                , {"type": "var", "name": "AR"}
                , {"type": "var", "name": "libname"}
                ]
              , {"type": "keys", "$1": {"type": "var", "name": "libs"}}
              ]
            }
          , "env":
            {"type": "var", "name": "ENV", "default": {"type": "empty_map"}}
          }
        ]
      ]
    , "body":
      { "type": "RESULT"
      , "artifacts": {"type": "var", "name": "combined lib"}
      , "provides":
        { "type": "map_union"
        , "$1":
          [ { "type": "env"
            , "vars":
              [ "compile-deps"
              , "compile-args"
              , "link-deps"
              , "link-args"
              , "package"
              ]
            }
          , { "type": "var"
            , "name": "extra-provides"
            , "default": {"type": "empty_map"}
            }
          ]
        }
      }
    }
  }
}