| // 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 cli |
| |
| import ( |
| "strings" |
| |
| "cuelang.org/go/cue" |
| "cuelang.org/go/cue/ast" |
| "cuelang.org/go/cue/errors" |
| "cuelang.org/go/cue/parser" |
| "cuelang.org/go/cue/token" |
| ) |
| |
| func ParseValue(pos token.Pos, name, str string, k cue.Kind) (x ast.Expr, errs errors.Error) { |
| var expr ast.Expr |
| |
| if k&cue.NumberKind != 0 { |
| var err error |
| expr, err = parser.ParseExpr(name, str) |
| if err != nil { |
| errs = errors.Wrapf(err, pos, |
| "invalid number for environment variable %s", name) |
| } |
| } |
| |
| if k&cue.BoolKind != 0 { |
| str = strings.TrimSpace(str) |
| b, ok := boolValues[str] |
| if !ok { |
| errs = errors.Append(errs, errors.Newf(pos, |
| "invalid boolean value %q for environment variable %s", str, name)) |
| } else if expr != nil || k&cue.StringKind != 0 { |
| // Convert into an expression |
| bl := ast.NewBool(b) |
| if expr != nil { |
| expr = &ast.BinaryExpr{Op: token.OR, X: expr, Y: bl} |
| } else { |
| expr = bl |
| } |
| } else { |
| x = ast.NewBool(b) |
| } |
| } |
| |
| if k&cue.StringKind != 0 { |
| if expr != nil { |
| expr = &ast.BinaryExpr{Op: token.OR, X: expr, Y: ast.NewString(str)} |
| } else { |
| x = ast.NewString(str) |
| } |
| } |
| |
| switch { |
| case expr != nil: |
| return expr, nil |
| case x != nil: |
| return x, nil |
| case errs == nil: |
| return nil, errors.Newf(pos, |
| "invalid type for environment variable %s", name) |
| } |
| return nil, errs |
| } |
| |
| var boolValues = map[string]bool{ |
| "1": true, |
| "0": false, |
| "t": true, |
| "f": false, |
| "T": true, |
| "F": false, |
| "true": true, |
| "false": false, |
| "TRUE": true, |
| "FALSE": false, |
| "True": true, |
| "False": false, |
| } |