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bin/pegjs: Implement the --format option

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This commit is contained in:
David Majda 2016-07-14 16:16:29 +02:00
parent d83e4d5a48
commit 75cd17ed58
2 changed files with 36 additions and 8 deletions
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10
README.md
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@ -83,10 +83,8 @@ $ pegjs -o arithmetics-parser.js arithmetics.pegjs
If you omit both input and output file, standard input and output are used.
The generated parser is in the [UMD](https://github.com/umdjs/umd) format, which
means it works as a Node.js or AMD module. You can also use the
`-e`/`--export-var` option to define a global variable into which the parser
object is assigned to when no module loader is detected.
By default, the generated parser is in the Node.js module format. You can
override this using the `--format` option.
You can tweak the generated parser with several options:
@ -96,10 +94,14 @@ You can tweak the generated parser with several options:
time in pathological cases but making the parser slower
* `--dependency` — makes the parser require a specified dependency (can be
specified multiple times)
* `--export-var` — name of a global variable into which the parser object is
assigned to when no module loader is detected
* `--extra-options` — additional options (in JSON format) to pass to
`peg.generate`
* `--extra-options-file` — file with additional options (in JSON format) to
pass to `peg.generate`
* `--format` — format of the generated parser: `amd`, `global`, `node`, `umd`
(default: `node`)
* `--optimize` — selects between optimizing the generated parser for parsing
speed (`speed`) or code size (`size`) (default: `speed`)
* `--plugin` — makes PEG.js use a specified plugin (can be specified multiple

34
bin/pegjs
View file

@ -2,9 +2,10 @@
"use strict";
var fs = require("fs");
var path = require("path");
var peg = require("../lib/peg");
var fs = require("fs");
var path = require("path");
var peg = require("../lib/peg");
var objects = require("../lib/utils/objects");
/* Helpers */
@ -25,11 +26,13 @@ function printHelp() {
console.log(" multiple times)");
console.log(" -e, --export-var <variable> name of a global variable into which the");
console.log(" parser object is assigned to when no module");
console.log(" loader is detected (default: \"\")");
console.log(" loader is detected");
console.log(" --extra-options <options> additional options (in JSON format) to pass");
console.log(" to peg.generate");
console.log(" --extra-options-file <file> file with additional options (in JSON");
console.log(" format) to pass to peg.generate");
console.log(" --format <format> format of the generated parser: amd, global,");
console.log(" node, umd (default: node)");
console.log(" -h, --help print help and exit");
console.log(" -O, --optimize <goal> select optimization for speed or size");
console.log(" (default: speed)");
@ -178,6 +181,17 @@ while (args.length > 0 && isOption(args[0])) {
addExtraOptions(options, json);
break;
case "--format":
nextArg();
if (args.length === 0) {
abort("Missing parameter of the --format option.");
}
if (args[0] !== "amd" && args[0] !== "global" && args[0] !== "node" && args[0] !== "umd") {
abort("Module format must be one of \"amd\", \"global\", \"node\", and \"umd\".");
}
options.format = args[0];
break;
case "-h":
case "--help":
printHelp();
@ -242,6 +256,18 @@ while (args.length > 0 && isOption(args[0])) {
nextArg();
}
if (objects.keys(options.dependencies).length > 0) {
if (options.format !== "amd" && options.format !== "node" && options.format !== "umd") {
abort("Can't use the -d/--dependency option with the \"" + options.format + "\" module format.");
}
}
if (options.exportVar !== null) {
if (options.format !== "global" && options.format !== "umd") {
abort("Can't use the -e/--export-var option with the \"" + options.format + "\" module format.");
}
}
var inputStream;
var outputStream;