| 1 | ## our_shell: ysh
|
| 2 | ## oils_failures_allowed: 1
|
| 3 |
|
| 4 | #### args.ysh example usage
|
| 5 | source $LIB_YSH/args.ysh
|
| 6 |
|
| 7 | parser (&spec) {
|
| 8 | flag -v --verbose (help="Verbosely") # default is Bool, false
|
| 9 |
|
| 10 | flag -P --max-procs ('int', default=-1, help='''
|
| 11 | Run at most P processes at a time
|
| 12 | ''')
|
| 13 |
|
| 14 | flag -i --invert ('bool', default=true, help='''
|
| 15 | Long multiline
|
| 16 | Description
|
| 17 | ''')
|
| 18 |
|
| 19 | arg src (help='Source')
|
| 20 | arg dest (help='Dest')
|
| 21 |
|
| 22 | rest files
|
| 23 | }
|
| 24 |
|
| 25 | var args = parseArgs(spec, :| mysrc -P 12 mydest a b c |)
|
| 26 |
|
| 27 | echo "Verbose $[args.verbose]"
|
| 28 | pp test_ (args)
|
| 29 | ## STDOUT:
|
| 30 | Verbose false
|
| 31 | (Dict) {"src":"mysrc","max-procs":12,"dest":"mydest","files":["a","b","c"],"verbose":false,"invert":true}
|
| 32 | ## END
|
| 33 |
|
| 34 | #### Bool flag, positional args, more positional
|
| 35 |
|
| 36 | source $LIB_YSH/args.ysh
|
| 37 |
|
| 38 | parser (&spec) {
|
| 39 | flag -v --verbose ('bool')
|
| 40 | arg src
|
| 41 | arg dst
|
| 42 |
|
| 43 | rest more # allow more args
|
| 44 | }
|
| 45 | #json write (spec)
|
| 46 |
|
| 47 | var argv = ['-v', 'src/path', 'dst/path', 'x', 'y', 'z']
|
| 48 |
|
| 49 | var args = parseArgs(spec, argv)
|
| 50 |
|
| 51 | pp test_ (args)
|
| 52 |
|
| 53 | if (args.verbose) {
|
| 54 | echo "$[args.src] -> $[args.dst]"
|
| 55 | write -- @[args.more]
|
| 56 | }
|
| 57 |
|
| 58 | ## STDOUT:
|
| 59 | (Dict) {"verbose":true,"src":"src/path","dst":"dst/path","more":["x","y","z"]}
|
| 60 | src/path -> dst/path
|
| 61 | x
|
| 62 | y
|
| 63 | z
|
| 64 | ## END
|
| 65 |
|
| 66 | #### Test multiple ARGVs against a parser
|
| 67 |
|
| 68 | source $LIB_YSH/args.ysh
|
| 69 |
|
| 70 | parser (&spec) {
|
| 71 | flag -v --verbose ('bool', default=false)
|
| 72 | flag -c --count ('int', default=120)
|
| 73 | arg file
|
| 74 | }
|
| 75 |
|
| 76 | var argsCases = [
|
| 77 | :| -v --count 120 example.sh |,
|
| 78 | :| -v --count 120 example.sh -v |, # duplicate flags are ignored
|
| 79 | :| -v --count 120 example.sh -v --count 150 |, # the last duplicate has precedence
|
| 80 | ]
|
| 81 |
|
| 82 | for args in (argsCases) {
|
| 83 | var args_str = join(args, ' ')
|
| 84 | echo "---------- $args_str ----------"
|
| 85 | echo "\$ bin/ysh example.sh $args_str"
|
| 86 | pp test_ (parseArgs(spec, args))
|
| 87 |
|
| 88 | echo
|
| 89 | }
|
| 90 | ## STDOUT:
|
| 91 | ---------- -v --count 120 example.sh ----------
|
| 92 | $ bin/ysh example.sh -v --count 120 example.sh
|
| 93 | (Dict) {"verbose":true,"count":120,"file":"example.sh"}
|
| 94 |
|
| 95 | ---------- -v --count 120 example.sh -v ----------
|
| 96 | $ bin/ysh example.sh -v --count 120 example.sh -v
|
| 97 | (Dict) {"verbose":true,"count":120,"file":"example.sh"}
|
| 98 |
|
| 99 | ---------- -v --count 120 example.sh -v --count 150 ----------
|
| 100 | $ bin/ysh example.sh -v --count 120 example.sh -v --count 150
|
| 101 | (Dict) {"verbose":true,"count":150,"file":"example.sh"}
|
| 102 |
|
| 103 | ## END
|
| 104 |
|
| 105 | #### Basic help message
|
| 106 |
|
| 107 | source $LIB_YSH/args.ysh
|
| 108 |
|
| 109 | parser (&spec) {
|
| 110 | # TODO: implement description, prog and help message
|
| 111 | description '''
|
| 112 | Reference Implementation
|
| 113 | '''
|
| 114 | prog "program-name"
|
| 115 |
|
| 116 | arg -v --verbose (Bool, help = "Verbose")
|
| 117 | arg src
|
| 118 | arg dst
|
| 119 | }
|
| 120 | var argv = ['-h', 'src', 'dst']
|
| 121 |
|
| 122 | # Help
|
| 123 | var args = parseArgs(spec, argv)
|
| 124 |
|
| 125 | ## STDOUT:
|
| 126 | usage: program-name [-h] [-v] src dst
|
| 127 |
|
| 128 | Reference Implementation
|
| 129 |
|
| 130 | positional arguments:
|
| 131 | src
|
| 132 | dst
|
| 133 |
|
| 134 | options:
|
| 135 | -h, --help show this help message and exit
|
| 136 | -v, --verbose Verbose
|
| 137 | ## END
|
| 138 |
|
| 139 | #### Compare parseArgs() vs Python argparse
|
| 140 |
|
| 141 | source $LIB_YSH/args.ysh
|
| 142 |
|
| 143 | var spec = {
|
| 144 | flags: [
|
| 145 | {short: '-v', long: '--verbose', name: 'verbose', type: null, default: '', help: 'Enable verbose logging'},
|
| 146 | {short: '-c', long: '--count', name: 'count', type: 'int', default: 80, help: 'Maximum line length'},
|
| 147 | ],
|
| 148 | args: [
|
| 149 | {name: 'file', type: 'str', help: 'File to check line lengths of'}
|
| 150 | ],
|
| 151 | rest: null,
|
| 152 | }
|
| 153 |
|
| 154 | var argsCases = [
|
| 155 | :| -v --count 120 example.sh |,
|
| 156 | :| -v --count 120 example.sh -v |, # duplicate flags are ignored
|
| 157 | :| -v --count 120 example.sh -v --count 150 |, # the last duplicate has precedence
|
| 158 | ]
|
| 159 |
|
| 160 | var argparse_py = '''
|
| 161 | import argparse
|
| 162 | import sys
|
| 163 |
|
| 164 | spec = argparse.ArgumentParser()
|
| 165 | spec.add_argument("filename")
|
| 166 | spec.add_argument("-c", "--count")
|
| 167 | spec.add_argument("-v", "--verbose",
|
| 168 | action="store_true")
|
| 169 |
|
| 170 | result = spec.parse_args(sys.argv[1:])
|
| 171 | print(result)
|
| 172 | '''
|
| 173 |
|
| 174 | for args in (argsCases) {
|
| 175 | var args_str = args=>join(" ")
|
| 176 | echo "---------- $args_str ----------"
|
| 177 | echo "\$ bin/ysh example.sh $args_str"
|
| 178 | pp test_ (parseArgs(spec, args))
|
| 179 |
|
| 180 | echo
|
| 181 | echo "\$ python3 example.py $args_str"
|
| 182 | python3 -c $argparse_py @args
|
| 183 |
|
| 184 | echo
|
| 185 | }
|
| 186 | ## STDOUT:
|
| 187 | ---------- -v --count 120 example.sh ----------
|
| 188 | $ bin/ysh example.sh -v --count 120 example.sh
|
| 189 | (Dict) {"verbose":true,"count":120,"file":"example.sh"}
|
| 190 |
|
| 191 | $ python3 example.py -v --count 120 example.sh
|
| 192 | Namespace(filename='example.sh', count='120', verbose=True)
|
| 193 |
|
| 194 | ---------- -v --count 120 example.sh -v ----------
|
| 195 | $ bin/ysh example.sh -v --count 120 example.sh -v
|
| 196 | (Dict) {"verbose":true,"count":120,"file":"example.sh"}
|
| 197 |
|
| 198 | $ python3 example.py -v --count 120 example.sh -v
|
| 199 | Namespace(filename='example.sh', count='120', verbose=True)
|
| 200 |
|
| 201 | ---------- -v --count 120 example.sh -v --count 150 ----------
|
| 202 | $ bin/ysh example.sh -v --count 120 example.sh -v --count 150
|
| 203 | (Dict) {"verbose":true,"count":150,"file":"example.sh"}
|
| 204 |
|
| 205 | $ python3 example.py -v --count 120 example.sh -v --count 150
|
| 206 | Namespace(filename='example.sh', count='150', verbose=True)
|
| 207 |
|
| 208 | ## END
|
| 209 |
|
| 210 | #### Define spec and print it
|
| 211 |
|
| 212 | source $LIB_YSH/args.ysh
|
| 213 |
|
| 214 | parser (&spec) {
|
| 215 | flag -v --verbose ('bool')
|
| 216 | arg src
|
| 217 | arg dst
|
| 218 |
|
| 219 | rest more # allow more args
|
| 220 | }
|
| 221 |
|
| 222 | json write (spec)
|
| 223 | ## STDOUT:
|
| 224 | {
|
| 225 | "flags": [
|
| 226 | {
|
| 227 | "short": "-v",
|
| 228 | "long": "--verbose",
|
| 229 | "name": "verbose",
|
| 230 | "type": "bool",
|
| 231 | "default": false,
|
| 232 | "help": null
|
| 233 | }
|
| 234 | ],
|
| 235 | "args": [
|
| 236 | {
|
| 237 | "name": "src",
|
| 238 | "help": null
|
| 239 | },
|
| 240 | {
|
| 241 | "name": "dst",
|
| 242 | "help": null
|
| 243 | }
|
| 244 | ],
|
| 245 | "rest": "more"
|
| 246 | }
|
| 247 | ## END
|
| 248 |
|
| 249 | #### Default values
|
| 250 | source $LIB_YSH/args.ysh
|
| 251 |
|
| 252 | parser (&spec) {
|
| 253 | flag -S --sanitize ('bool', default=false)
|
| 254 | flag -v --verbose ('bool', default=false)
|
| 255 | flag -P --max-procs ('int') # Will set to null (the default default)
|
| 256 | }
|
| 257 |
|
| 258 | var args = parseArgs(spec, [])
|
| 259 |
|
| 260 | pp test_ (args)
|
| 261 | ## STDOUT:
|
| 262 | (Dict) {"sanitize":false,"verbose":false,"max-procs":null}
|
| 263 | ## END
|
| 264 |
|
| 265 | #### Duplicate argument/flag names
|
| 266 | source $LIB_YSH/args.ysh
|
| 267 |
|
| 268 | try {
|
| 269 | parser (&spec) {
|
| 270 | flag -n --name
|
| 271 | flag -N --name
|
| 272 | }
|
| 273 | }
|
| 274 | echo status=$_status
|
| 275 |
|
| 276 | try {
|
| 277 | parser (&spec) {
|
| 278 | flag -n --name
|
| 279 | arg name
|
| 280 | }
|
| 281 | }
|
| 282 | echo status=$_status
|
| 283 |
|
| 284 | try {
|
| 285 | parser (&spec) {
|
| 286 | arg name
|
| 287 | flag -o --other
|
| 288 | arg name
|
| 289 | }
|
| 290 | }
|
| 291 | echo status=$_status
|
| 292 | ## STDOUT:
|
| 293 | status=3
|
| 294 | status=3
|
| 295 | status=3
|
| 296 | ## END
|
| 297 |
|
| 298 | #### Error cases
|
| 299 | source $LIB_YSH/args.ysh
|
| 300 |
|
| 301 | parser (&spec) {
|
| 302 | flag -v --verbose
|
| 303 | flag -n --num ('int', required=true)
|
| 304 |
|
| 305 | arg action
|
| 306 | arg other (required=false)
|
| 307 | }
|
| 308 |
|
| 309 | try { call parseArgs(spec, :| -n 10 action other extra |) }
|
| 310 | echo status=$_status
|
| 311 |
|
| 312 | try { call parseArgs(spec, :| -n |) }
|
| 313 | echo status=$_status
|
| 314 |
|
| 315 | try { call parseArgs(spec, :| -n -v |) }
|
| 316 | echo status=$_status
|
| 317 |
|
| 318 | try { = parseArgs(spec, :| -n 10 |) }
|
| 319 | echo status=$_status
|
| 320 |
|
| 321 | try { call parseArgs(spec, :| -v action |) }
|
| 322 | echo status=$_status
|
| 323 |
|
| 324 | try { call parseArgs(spec, :| --unknown |) }
|
| 325 | echo status=$_status
|
| 326 | ## STDOUT:
|
| 327 | status=2
|
| 328 | status=2
|
| 329 | status=2
|
| 330 | status=2
|
| 331 | status=2
|
| 332 | status=2
|
| 333 | ## END
|