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got a really nice --watch flag for bin/node_coffee going, thanks to Node.js' process.watchFile. Can be used with --print, --lint, --tokens, --run, or whatever your needs may be

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This commit is contained in:
Jeremy Ashkenas
2010-02-16 23:59:32 -05:00
parent 0610e20a3c
commit 9f2badb3e9
2 changed files with 72 additions and 22 deletions
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67
lib/coffee_script/command_line.js
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@@ -1,15 +1,11 @@
(function(){
var BANNER, SWITCHES, WATCH_INTERVAL, coffee, compile, compile_scripts, fs, lint, option_parser, options, optparse, parse_options, path, sources, usage, version, write_js;
var BANNER, SWITCHES, coffee, compile, compile_script, compile_scripts, fs, lint, option_parser, options, optparse, parse_options, path, sources, usage, version, watch_scripts, write_js;
fs = require('fs');
path = require('path');
coffee = require('coffee-script');
optparse = require('optparse');
BANNER = "coffee compiles CoffeeScript source files into JavaScript.\n\nUsage:\n coffee path/to/script.coffee";
SWITCHES = [['-i', '--interactive', 'run an interactive CoffeeScript REPL'], ['-r', '--run', 'compile and run a CoffeeScript'], ['-o', '--output [DIR]', 'set the directory for compiled JavaScript'],
// ['-w', '--watch', 'watch scripts for changes, and recompile']
['-p', '--print', 'print the compiled JavaScript to stdout'], ['-l', '--lint', 'pipe the compiled JavaScript through JSLint'], ['-e', '--eval', 'compile a string from the command line'], ['-t', '--tokens', 'print the tokens that the lexer produces'], ['-tr', '--tree', 'print the parse tree that Jison produces'], ['-v', '--version', 'display CoffeeScript version'], ['-h', '--help', 'display this help message']
];
WATCH_INTERVAL = 0.5;
SWITCHES = [['-i', '--interactive', 'run an interactive CoffeeScript REPL'], ['-r', '--run', 'compile and run a CoffeeScript'], ['-o', '--output [DIR]', 'set the directory for compiled JavaScript'], ['-w', '--watch', 'watch scripts for changes, and recompile'], ['-p', '--print', 'print the compiled JavaScript to stdout'], ['-l', '--lint', 'pipe the compiled JavaScript through JSLint'], ['-e', '--eval', 'compile a string from the command line'], ['-t', '--tokens', 'print the tokens that the lexer produces'], ['-tr', '--tree', 'print the parse tree that Jison produces'], ['-v', '--version', 'display CoffeeScript version'], ['-h', '--help', 'display this help message']];
options = {};
sources = [];
option_parser = null;
@@ -33,6 +29,9 @@
sources = sources.slice(0, separator);
}
process.ARGV = flags;
if (options.watch) {
watch_scripts();
}
compile_scripts();
return this;
};
@@ -69,31 +68,65 @@
// Compiles the source CoffeeScript, returning the desired JavaScript, tokens,
// or JSLint results.
compile_scripts = function compile_scripts() {
var opts, source;
var source;
if (!((source = sources.shift()))) {
return null;
}
opts = options;
return fs.cat(source).addCallback(function(code) {
var js;
compile_script(source, code);
return compile_scripts();
});
};
// Compile a single source script, containing the given code, according to the
// requested options. Both compile_scripts and watch_scripts share this method.
compile_script = function compile_script(source, code) {
var js, opts;
opts = options;
try {
if (opts.tokens) {
coffee.print_tokens(coffee.tokenize(code));
return coffee.print_tokens(coffee.tokenize(code));
} else if (opts.tree) {
puts(coffee.tree(code).toString());
return puts(coffee.tree(code).toString());
} else {
js = coffee.compile(code);
if (opts.run) {
eval(js);
return eval(js);
} else if (opts.print) {
puts(js);
return puts(js);
} else if (opts.lint) {
lint(js);
return lint(js);
} else {
write_js(source, coffee.compile(code));
return write_js(source, coffee.compile(code));
}
}
return compile_scripts();
});
} catch (err) {
if (opts.watch) {
return puts(err.message);
} else {
throw err;
}
}
};
// Watch a list of source CoffeeScript files, recompiling them every time the
// files are updated.
watch_scripts = function watch_scripts() {
var _a, _b, _c, source;
_a = []; _b = sources;
for (_c = 0; _c < _b.length; _c++) {
source = _b[_c];
_a.push(process.watchFile(source, {
persistent: true,
interval: 500
}, function(curr, prev) {
if (curr.mtime.getTime() === prev.mtime.getTime()) {
return null;
}
return fs.cat(source).addCallback(function(code) {
return compile_script(source, code);
});
}));
}
return _a;
};
// Write out a JavaScript source file with the compiled code.
write_js = function write_js(source, js) {