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// Copyright 2020 CUE Authors
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package runtime
import (
"cuelang.org/go/cue/build"
"cuelang.org/go/internal"
"cuelang.org/go/internal/core/adt"
"cuelang.org/go/internal/cuedebug"
"cuelang.org/go/internal/cueexperiment"
)
// A Runtime maintains data structures for indexing and reuse for evaluation.
type Runtime struct {
index *index
loaded map[*build.Instance]interface{}
// interpreters implement extern functionality. The map key corresponds to
// the kind in a file-level @extern(kind) attribute.
interpreters map[string]Interpreter
version internal.EvaluatorVersion
topoSort bool
flags cuedebug.Config
}
func (r *Runtime) Settings() (internal.EvaluatorVersion, cuedebug.Config) {
return r.version, r.flags
}
func (r *Runtime) ConfigureOpCtx(ctx *adt.OpContext) {
ctx.Version = r.version
ctx.TopoSort = r.topoSort
ctx.Config = r.flags
}
func (r *Runtime) SetBuildData(b *build.Instance, x interface{}) {
r.loaded[b] = x
}
func (r *Runtime) BuildData(b *build.Instance) (x interface{}, ok bool) {
x, ok = r.loaded[b]
return x, ok
}
// New creates a new Runtime obeying the CUE_EXPERIMENT and CUE_DEBUG flags set
// via environment variables.
func New() *Runtime {
r := &Runtime{}
r.Init()
return r
}
// NewWithSettings creates a new Runtime using the given runtime version and
// debug flags. The builtins registered with RegisterBuiltin are available for
// evaluation.
func NewWithSettings(v internal.EvaluatorVersion, flags cuedebug.Config) *Runtime {
r := New()
// Override the evaluator version and debug flags derived from env vars
// with the explicit arguments given to us here.
r.version = v
r.SetDebugOptions(&flags)
return r
}
// SetVersion sets the version to use for the Runtime. This should only be set
// before first use.
func (r *Runtime) SetVersion(v internal.EvaluatorVersion) {
r.version = v
}
// SetTopologicalSort sets whether or not to use topological sorting
// for the Runtime.
func (r *Runtime) SetTopologicalSort(b bool) {
r.topoSort = b
}
// SetDebugOptions sets the debug flags to use for the Runtime. This should only
// be set before first use.
func (r *Runtime) SetDebugOptions(flags *cuedebug.Config) {
r.flags = *flags
r.topoSort = r.topoSort || r.flags.SortFields
}
// IsInitialized reports whether the runtime has been initialized.
func (r *Runtime) IsInitialized() bool {
return r.index != nil
}
func (r *Runtime) Init() {
if r.index != nil {
return
}
r.index = newIndex()
// TODO: the builtin-specific instances will ultimately also not be
// shared by indexes.
r.index.builtinPaths = sharedIndex.builtinPaths
r.index.builtinShort = sharedIndex.builtinShort
r.loaded = map[*build.Instance]interface{}{}
cueexperiment.Init()
if cueexperiment.Flags.EvalV3 {
r.version = internal.DevVersion
} else {
r.version = internal.DefaultVersion
}
r.topoSort = cueexperiment.Flags.TopoSort
// By default we follow the environment's CUE_DEBUG settings,
// which can be overriden via [Runtime.SetDebugOptions],
// such as with the API option [cuelang.org/go/cue/cuecontext.CUE_DEBUG].
cuedebug.Init()
r.SetDebugOptions(&cuedebug.Flags)
}
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