Marcel van Lohuizen | 42346df | 2019-12-19 14:09:54 +0100 | [diff] [blame] | 1 | // Copyright 2019 CUE Authors |
| 2 | // |
| 3 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 4 | // you may not use this file except in compliance with the License. |
| 5 | // You may obtain a copy of the License at |
| 6 | // |
| 7 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 8 | // |
| 9 | // Unless required by applicable law or agreed to in writing, software |
| 10 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 11 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 12 | // See the License for the specific language governing permissions and |
| 13 | // limitations under the License. |
| 14 | |
| 15 | package os |
| 16 | |
| 17 | //go:generate go run gen.go |
Paul Jolly | 238d821 | 2020-05-15 09:56:41 +0100 | [diff] [blame] | 18 | //go:generate gofmt -s -w . |
Marcel van Lohuizen | 42346df | 2019-12-19 14:09:54 +0100 | [diff] [blame] | 19 | |
| 20 | import ( |
Marcel van Lohuizen | 42346df | 2019-12-19 14:09:54 +0100 | [diff] [blame] | 21 | "os" |
| 22 | "strings" |
| 23 | |
Marcel van Lohuizen | 845df05 | 2020-07-26 13:15:45 +0200 | [diff] [blame] | 24 | "cuelang.org/go/cue" |
Marcel van Lohuizen | 42346df | 2019-12-19 14:09:54 +0100 | [diff] [blame] | 25 | "cuelang.org/go/cue/ast" |
| 26 | "cuelang.org/go/cue/errors" |
Marcel van Lohuizen | aae80a0 | 2020-02-03 17:05:02 +0100 | [diff] [blame] | 27 | "cuelang.org/go/internal/cli" |
Marcel van Lohuizen | 42346df | 2019-12-19 14:09:54 +0100 | [diff] [blame] | 28 | "cuelang.org/go/internal/task" |
| 29 | ) |
| 30 | |
| 31 | func init() { |
Marcel van Lohuizen | 42346df | 2019-12-19 14:09:54 +0100 | [diff] [blame] | 32 | task.Register("tool/os.Getenv", newGetenvCmd) |
| 33 | task.Register("tool/os.Environ", newEnvironCmd) |
Marcel van Lohuizen | 42346df | 2019-12-19 14:09:54 +0100 | [diff] [blame] | 34 | |
| 35 | // TODO: |
| 36 | // Tasks: |
| 37 | // - Exit? |
| 38 | // - Getwd/ Setwd (or in tool/file?) |
| 39 | |
| 40 | // Functions: |
| 41 | // - Hostname |
| 42 | // - UserCache/Home/Config (or in os/user?) |
| 43 | } |
| 44 | |
Marcel van Lohuizen | 42346df | 2019-12-19 14:09:54 +0100 | [diff] [blame] | 45 | type getenvCmd struct{} |
| 46 | |
| 47 | func newGetenvCmd(v cue.Value) (task.Runner, error) { |
| 48 | return &getenvCmd{}, nil |
| 49 | } |
| 50 | |
Marcel van Lohuizen | a7b4ca8 | 2019-12-24 11:31:28 +0100 | [diff] [blame] | 51 | func (c *getenvCmd) Run(ctx *task.Context) (res interface{}, err error) { |
| 52 | iter, err := ctx.Obj.Fields() |
Marcel van Lohuizen | 42346df | 2019-12-19 14:09:54 +0100 | [diff] [blame] | 53 | if err != nil { |
| 54 | return nil, err |
| 55 | } |
| 56 | |
| 57 | update := map[string]interface{}{} |
| 58 | |
| 59 | for iter.Next() { |
| 60 | name := iter.Label() |
| 61 | if strings.HasPrefix(name, "$") { |
| 62 | continue |
| 63 | } |
| 64 | v := iter.Value() |
| 65 | |
Marcel van Lohuizen | fbc6f86 | 2020-07-25 12:17:55 +0200 | [diff] [blame] | 66 | if err := v.Err(); err != nil { |
| 67 | return nil, err |
| 68 | } |
| 69 | |
Marcel van Lohuizen | 42346df | 2019-12-19 14:09:54 +0100 | [diff] [blame] | 70 | if err := validateEntry(name, v); err != nil { |
| 71 | return nil, err |
| 72 | } |
| 73 | |
| 74 | str, ok := os.LookupEnv(name) |
| 75 | if !ok { |
| 76 | update[name] = nil |
| 77 | continue |
| 78 | } |
| 79 | x, err := fromString(name, str, v) |
| 80 | if err != nil { |
| 81 | return nil, err |
| 82 | } |
| 83 | update[name] = x |
| 84 | } |
| 85 | |
| 86 | return update, nil |
| 87 | } |
| 88 | |
| 89 | type environCmd struct{} |
| 90 | |
| 91 | func newEnvironCmd(v cue.Value) (task.Runner, error) { |
| 92 | return &environCmd{}, nil |
| 93 | } |
| 94 | |
Marcel van Lohuizen | a7b4ca8 | 2019-12-24 11:31:28 +0100 | [diff] [blame] | 95 | func (c *environCmd) Run(ctx *task.Context) (res interface{}, err error) { |
| 96 | iter, err := ctx.Obj.Fields() |
Marcel van Lohuizen | 42346df | 2019-12-19 14:09:54 +0100 | [diff] [blame] | 97 | if err != nil { |
| 98 | return nil, err |
| 99 | } |
| 100 | |
| 101 | update := map[string]interface{}{} |
| 102 | |
| 103 | for _, kv := range os.Environ() { |
| 104 | a := strings.SplitN(kv, "=", 2) |
| 105 | |
| 106 | name := a[0] |
| 107 | str := a[1] |
| 108 | |
Marcel van Lohuizen | a7b4ca8 | 2019-12-24 11:31:28 +0100 | [diff] [blame] | 109 | if v := ctx.Obj.Lookup(name); v.Exists() { |
Marcel van Lohuizen | 42346df | 2019-12-19 14:09:54 +0100 | [diff] [blame] | 110 | update[name], err = fromString(name, str, v) |
| 111 | if err != nil { |
| 112 | return nil, err |
| 113 | } |
| 114 | } else { |
| 115 | update[name] = str |
| 116 | } |
| 117 | } |
| 118 | |
| 119 | for iter.Next() { |
| 120 | name := iter.Label() |
| 121 | if strings.HasPrefix(name, "$") { |
| 122 | continue |
| 123 | } |
Marcel van Lohuizen | fbc6f86 | 2020-07-25 12:17:55 +0200 | [diff] [blame] | 124 | v := iter.Value() |
| 125 | if err := v.Err(); err != nil { |
| 126 | return nil, err |
| 127 | } |
| 128 | if err := validateEntry(name, v); err != nil { |
Marcel van Lohuizen | 42346df | 2019-12-19 14:09:54 +0100 | [diff] [blame] | 129 | return nil, err |
| 130 | } |
| 131 | if _, ok := update[name]; !ok { |
| 132 | update[name] = nil |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | return update, nil |
| 137 | } |
| 138 | |
| 139 | func validateEntry(name string, v cue.Value) error { |
| 140 | if k := v.IncompleteKind(); k&^(cue.NumberKind|cue.NullKind|cue.BoolKind|cue.StringKind) != 0 { |
| 141 | return errors.Newf(v.Pos(), |
| 142 | "invalid type %s for environment variable %s", k, name) |
| 143 | } |
| 144 | return nil |
| 145 | } |
| 146 | |
Marcel van Lohuizen | aae80a0 | 2020-02-03 17:05:02 +0100 | [diff] [blame] | 147 | func fromString(name, str string, v cue.Value) (x ast.Node, err error) { |
Marcel van Lohuizen | 42346df | 2019-12-19 14:09:54 +0100 | [diff] [blame] | 148 | k := v.IncompleteKind() |
Marcel van Lohuizen | aae80a0 | 2020-02-03 17:05:02 +0100 | [diff] [blame] | 149 | return cli.ParseValue(v.Pos(), name, str, k) |
Marcel van Lohuizen | 42346df | 2019-12-19 14:09:54 +0100 | [diff] [blame] | 150 | } |