Shinichiro Hamaji | 1d545aa | 2015-06-23 15:29:13 +0900 | [diff] [blame] | 1 | // Copyright 2015 Google Inc. All rights reserved |
| 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 | |
Fumitoshi Ukai | 744bb2b | 2015-06-25 00:10:52 +0900 | [diff] [blame] | 15 | package kati |
Fumitoshi Ukai | 4a70851 | 2015-06-11 17:15:49 +0900 | [diff] [blame] | 16 | |
| 17 | import ( |
Fumitoshi Ukai | 0547db6 | 2015-07-29 16:20:59 +0900 | [diff] [blame] | 18 | "errors" |
Fumitoshi Ukai | 44ae8cf | 2015-06-24 16:44:15 +0900 | [diff] [blame] | 19 | "fmt" |
Fumitoshi Ukai | 0547db6 | 2015-07-29 16:20:59 +0900 | [diff] [blame] | 20 | "io" |
Fumitoshi Ukai | 4a70851 | 2015-06-11 17:15:49 +0900 | [diff] [blame] | 21 | "strings" |
Fumitoshi Ukai | 44ae8cf | 2015-06-24 16:44:15 +0900 | [diff] [blame] | 22 | "time" |
Fumitoshi Ukai | 4a70851 | 2015-06-11 17:15:49 +0900 | [diff] [blame] | 23 | ) |
| 24 | |
| 25 | var shBuiltins = []struct { |
| 26 | name string |
Fumitoshi Ukai | 55c8fa9 | 2015-06-25 15:56:10 +0900 | [diff] [blame] | 27 | pattern expr |
Fumitoshi Ukai | 4a70851 | 2015-06-11 17:15:49 +0900 | [diff] [blame] | 28 | compact func(*funcShell, []Value) Value |
| 29 | }{ |
| 30 | { |
| 31 | name: "android:rot13", |
| 32 | // in repo/android/build/core/definisions.mk |
| 33 | // echo $(1) | tr 'a-zA-Z' 'n-za-mN-ZA-M' |
Fumitoshi Ukai | 55c8fa9 | 2015-06-25 15:56:10 +0900 | [diff] [blame] | 34 | pattern: expr{ |
Fumitoshi Ukai | 4a70851 | 2015-06-11 17:15:49 +0900 | [diff] [blame] | 35 | literal("echo "), |
| 36 | matchVarref{}, |
| 37 | literal(" | tr 'a-zA-Z' 'n-za-mN-ZA-M'"), |
| 38 | }, |
| 39 | compact: func(sh *funcShell, matches []Value) Value { |
| 40 | return &funcShellAndroidRot13{ |
| 41 | funcShell: sh, |
| 42 | v: matches[0], |
| 43 | } |
| 44 | }, |
| 45 | }, |
| 46 | { |
Fumitoshi Ukai | 44ae8cf | 2015-06-24 16:44:15 +0900 | [diff] [blame] | 47 | name: "shell-date", |
Fumitoshi Ukai | 55c8fa9 | 2015-06-25 15:56:10 +0900 | [diff] [blame] | 48 | pattern: expr{ |
Fumitoshi Ukai | 44ae8cf | 2015-06-24 16:44:15 +0900 | [diff] [blame] | 49 | mustLiteralRE(`date \+(\S+)`), |
| 50 | }, |
| 51 | compact: compactShellDate, |
| 52 | }, |
| 53 | { |
| 54 | name: "shell-date-quoted", |
Fumitoshi Ukai | 55c8fa9 | 2015-06-25 15:56:10 +0900 | [diff] [blame] | 55 | pattern: expr{ |
Fumitoshi Ukai | 44ae8cf | 2015-06-24 16:44:15 +0900 | [diff] [blame] | 56 | mustLiteralRE(`date "\+([^"]+)"`), |
| 57 | }, |
| 58 | compact: compactShellDate, |
| 59 | }, |
Fumitoshi Ukai | 4a70851 | 2015-06-11 17:15:49 +0900 | [diff] [blame] | 60 | } |
| 61 | |
| 62 | type funcShellAndroidRot13 struct { |
| 63 | *funcShell |
| 64 | v Value |
| 65 | } |
| 66 | |
| 67 | func rot13(buf []byte) { |
| 68 | for i, b := range buf { |
| 69 | // tr 'a-zA-Z' 'n-za-mN-ZA-M' |
| 70 | if b >= 'a' && b <= 'z' { |
| 71 | b += 'n' - 'a' |
| 72 | if b > 'z' { |
| 73 | b -= 'z' - 'a' + 1 |
| 74 | } |
| 75 | } else if b >= 'A' && b <= 'Z' { |
| 76 | b += 'N' - 'A' |
| 77 | if b > 'Z' { |
| 78 | b -= 'Z' - 'A' + 1 |
| 79 | } |
| 80 | } |
| 81 | buf[i] = b |
| 82 | } |
| 83 | } |
| 84 | |
Fumitoshi Ukai | b44b12d | 2015-07-07 14:19:32 +0900 | [diff] [blame] | 85 | func (f *funcShellAndroidRot13) Eval(w evalWriter, ev *Evaluator) error { |
Fumitoshi Ukai | a4a0225 | 2015-07-09 14:25:18 +0900 | [diff] [blame] | 86 | abuf := newEbuf() |
Fumitoshi Ukai | 65c7233 | 2015-06-26 21:32:50 +0900 | [diff] [blame] | 87 | fargs, err := ev.args(abuf, f.v) |
| 88 | if err != nil { |
| 89 | return err |
| 90 | } |
Fumitoshi Ukai | 4a70851 | 2015-06-11 17:15:49 +0900 | [diff] [blame] | 91 | rot13(fargs[0]) |
| 92 | w.Write(fargs[0]) |
Fumitoshi Ukai | a4a0225 | 2015-07-09 14:25:18 +0900 | [diff] [blame] | 93 | abuf.release() |
Fumitoshi Ukai | 65c7233 | 2015-06-26 21:32:50 +0900 | [diff] [blame] | 94 | return nil |
Fumitoshi Ukai | 4a70851 | 2015-06-11 17:15:49 +0900 | [diff] [blame] | 95 | } |
| 96 | |
Fumitoshi Ukai | 44ae8cf | 2015-06-24 16:44:15 +0900 | [diff] [blame] | 97 | var ( |
Fumitoshi Ukai | 65c7233 | 2015-06-26 21:32:50 +0900 | [diff] [blame] | 98 | // ShellDateTimestamp is an timestamp used for $(shell date). |
Fumitoshi Ukai | 744bb2b | 2015-06-25 00:10:52 +0900 | [diff] [blame] | 99 | ShellDateTimestamp time.Time |
Fumitoshi Ukai | 44ae8cf | 2015-06-24 16:44:15 +0900 | [diff] [blame] | 100 | shellDateFormatRef = map[string]string{ |
| 101 | "%Y": "2006", |
| 102 | "%m": "01", |
| 103 | "%d": "02", |
| 104 | "%H": "15", |
| 105 | "%M": "04", |
| 106 | "%S": "05", |
| 107 | "%b": "Jan", |
| 108 | "%k": "15", // XXX |
| 109 | } |
| 110 | ) |
| 111 | |
| 112 | type funcShellDate struct { |
| 113 | *funcShell |
| 114 | format string |
| 115 | } |
| 116 | |
| 117 | func compactShellDate(sh *funcShell, v []Value) Value { |
Fumitoshi Ukai | 744bb2b | 2015-06-25 00:10:52 +0900 | [diff] [blame] | 118 | if ShellDateTimestamp.IsZero() { |
Fumitoshi Ukai | 44ae8cf | 2015-06-24 16:44:15 +0900 | [diff] [blame] | 119 | return sh |
| 120 | } |
| 121 | tf, ok := v[0].(literal) |
| 122 | if !ok { |
| 123 | return sh |
| 124 | } |
| 125 | tfstr := string(tf) |
| 126 | for k, v := range shellDateFormatRef { |
| 127 | tfstr = strings.Replace(tfstr, k, v, -1) |
| 128 | } |
| 129 | return &funcShellDate{ |
| 130 | funcShell: sh, |
| 131 | format: tfstr, |
| 132 | } |
| 133 | } |
| 134 | |
Fumitoshi Ukai | b44b12d | 2015-07-07 14:19:32 +0900 | [diff] [blame] | 135 | func (f *funcShellDate) Eval(w evalWriter, ev *Evaluator) error { |
Fumitoshi Ukai | 744bb2b | 2015-06-25 00:10:52 +0900 | [diff] [blame] | 136 | fmt.Fprint(w, ShellDateTimestamp.Format(f.format)) |
Fumitoshi Ukai | 65c7233 | 2015-06-26 21:32:50 +0900 | [diff] [blame] | 137 | return nil |
Fumitoshi Ukai | 44ae8cf | 2015-06-24 16:44:15 +0900 | [diff] [blame] | 138 | } |
Fumitoshi Ukai | 0547db6 | 2015-07-29 16:20:59 +0900 | [diff] [blame] | 139 | |
| 140 | type buildinCommand interface { |
| 141 | run(w evalWriter) |
| 142 | } |
| 143 | |
| 144 | var errFindEmulatorDisabled = errors.New("builtin: find emulator disabled") |
| 145 | |
| 146 | func parseBuiltinCommand(cmd string) (buildinCommand, error) { |
| 147 | if !UseFindEmulator { |
| 148 | return nil, errFindEmulatorDisabled |
| 149 | } |
Fumitoshi Ukai | f8e4baf | 2015-08-10 15:40:51 +0900 | [diff] [blame] | 150 | if strings.HasPrefix(trimLeftSpace(cmd), "build/tools/findleaves") { |
Fumitoshi Ukai | 0547db6 | 2015-07-29 16:20:59 +0900 | [diff] [blame] | 151 | return parseFindleavesCommand(cmd) |
| 152 | } |
| 153 | return parseFindCommand(cmd) |
| 154 | } |
| 155 | |
| 156 | type shellParser struct { |
| 157 | cmd string |
| 158 | ungetToken string |
| 159 | } |
| 160 | |
| 161 | func (p *shellParser) token() (string, error) { |
| 162 | if p.ungetToken != "" { |
| 163 | tok := p.ungetToken |
| 164 | p.ungetToken = "" |
| 165 | return tok, nil |
| 166 | } |
| 167 | p.cmd = trimLeftSpace(p.cmd) |
| 168 | if len(p.cmd) == 0 { |
| 169 | return "", io.EOF |
| 170 | } |
| 171 | if p.cmd[0] == ';' { |
| 172 | tok := p.cmd[0:1] |
| 173 | p.cmd = p.cmd[1:] |
| 174 | return tok, nil |
| 175 | } |
| 176 | if p.cmd[0] == '&' { |
| 177 | if len(p.cmd) == 1 || p.cmd[1] != '&' { |
| 178 | return "", errFindBackground |
| 179 | } |
| 180 | tok := p.cmd[0:2] |
| 181 | p.cmd = p.cmd[2:] |
| 182 | return tok, nil |
| 183 | } |
| 184 | // TODO(ukai): redirect token. |
| 185 | i := 0 |
| 186 | for i < len(p.cmd) { |
| 187 | if isWhitespace(rune(p.cmd[i])) || p.cmd[i] == ';' || p.cmd[i] == '&' { |
| 188 | break |
| 189 | } |
| 190 | i++ |
| 191 | } |
| 192 | tok := p.cmd[0:i] |
| 193 | p.cmd = p.cmd[i:] |
| 194 | c := tok[0] |
| 195 | if c == '\'' || c == '"' { |
| 196 | if len(tok) < 2 || tok[len(tok)-1] != c { |
| 197 | return "", errFindUnbalancedQuote |
| 198 | } |
| 199 | // todo: unquote? |
| 200 | tok = tok[1 : len(tok)-1] |
| 201 | } |
| 202 | return tok, nil |
| 203 | } |
| 204 | |
| 205 | func (p *shellParser) unget(s string) { |
| 206 | if s != "" { |
| 207 | p.ungetToken = s |
| 208 | } |
| 209 | } |
| 210 | |
| 211 | func (p *shellParser) expect(toks ...string) error { |
| 212 | tok, err := p.token() |
| 213 | if err != nil { |
| 214 | return err |
| 215 | } |
| 216 | for _, t := range toks { |
| 217 | if tok == t { |
| 218 | return nil |
| 219 | } |
| 220 | } |
| 221 | return fmt.Errorf("shell: token=%q; want=%q", tok, toks) |
| 222 | } |
| 223 | |
| 224 | func (p *shellParser) expectSeq(toks ...string) error { |
| 225 | for _, tok := range toks { |
| 226 | err := p.expect(tok) |
| 227 | if err != nil { |
| 228 | return err |
| 229 | } |
| 230 | } |
| 231 | return nil |
| 232 | } |