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feat: add transform options to transform content #94

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feat: add transform options to transform content #94

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7d9cb47
feat: add transform options to transform content
wardpeet Aug 23, 2019
ec74c23
update readme
wardpeet Aug 23, 2019
993382a
remove readFileSyncTransform
wardpeet Apr 18, 2020
b2d0464
throw on reading undefined file path (#1)
brendankenny Nov 17, 2020
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321 changes: 178 additions & 143 deletions index.js
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Original file line number Diff line number Diff line change
@@ -1,152 +1,187 @@
var staticModule = require('static-module');
var quote = require('quote-stream');
var through = require('through2');
var fs = require('fs');
var path = require('path');
var resolve = require('resolve');
var staticModule = require("static-module");
var quote = require("quote-stream");
var through = require("through2");
var fs = require("fs");
var path = require("path");
var resolve = require("resolve");

module.exports = function (file, opts) {
if (/\.json$/.test(file)) return through();

function resolver (p) {
return resolve.sync(p, { basedir: path.dirname(file) });
}
var vars = {
__filename: file,
__dirname: path.dirname(file),
require: { resolve: resolver }
};
if (!opts) opts = {};
if (opts.vars) Object.keys(opts.vars).forEach(function (key) {
vars[key] = opts.vars[key];
if (/\.json$/.test(file)) return through();

function resolver(p) {
return resolve.sync(p, { basedir: path.dirname(file) });
}
function convertTransformOptionToStream(f, args) {
if (typeof f === "function") {
return f.apply(null, args);
}

return f;
}
var vars = {
__filename: file,
__dirname: path.dirname(file),
require: { resolve: resolver },
};
if (!opts) opts = {};
if (opts.vars)
Object.keys(opts.vars).forEach(function (key) {
vars[key] = opts.vars[key];
});

var sm = staticModule(
{
fs: {
readFileSync: readFileSync,
readFile: readFile,
readdirSync: readdirSync,
readdir: readdir
}
},
{
vars: vars,
varModules: { path: path },
parserOpts: opts && opts.parserOpts,
sourceMap: opts && (opts.sourceMap || opts._flags && opts._flags.debug),
inputFilename: file
}
);
return sm;

function readFile (file, enc, cb) {
if (typeof enc === 'function') {
cb = enc;
enc = null;
}
if (enc && typeof enc === 'object' && enc.encoding) {
enc = enc.encoding;
}
var isBuffer = false;
if (enc === null || enc === undefined) {
isBuffer = true;
enc = 'base64';
}

var stream = through(write, end);
stream.push('process.nextTick(function(){(' + cb + ')(null,');
if (isBuffer) stream.push('Buffer(');

var s = fs.createReadStream(file, { encoding: enc });
s.on('error', function (err) { sm.emit('error', err) });
return s.pipe(quote()).pipe(stream);

function write (buf, enc, next) {
this.push(buf);
next();
}
function end (next) {
if (isBuffer) this.push(',"base64")');
this.push(')})');
this.push(null);
sm.emit('file', file);
next()
}

var sm = staticModule(
{
fs: {
readFileSync: readFileSync,
readFile: readFile,
readdirSync: readdirSync,
readdir: readdir,
},
},
{
vars: vars,
varModules: { path: path },
parserOpts: opts && opts.parserOpts,
sourceMap: opts && (opts.sourceMap || (opts._flags && opts._flags.debug)),
inputFilename: file,
}
);
return sm;

function readFile(file, enc, cb) {
if (file === undefined) {
throw new Error('file is not resolvable');
}

function readFileSync (file, enc) {
var isBuffer = false;
if (enc === null || enc === undefined) {
isBuffer = true;
enc = 'base64';
}
if (enc && typeof enc === 'object' && enc.encoding) {
enc = enc.encoding;
}
var stream = fs.createReadStream(file, { encoding: enc })
.on('error', function (err) { sm.emit('error', err) })
.pipe(quote()).pipe(through(write, end))
;
if (isBuffer) {
stream.push('Buffer(');
}
return stream;

function write (buf, enc, next) {
this.push(buf);
next();
}
function end (next) {
if (isBuffer) this.push(',"base64")');
this.push(null);
sm.emit('file', file);
next();
}
if (typeof enc === "function") {
cb = enc;
enc = null;
}
if (enc && typeof enc === "object" && enc.encoding) {
enc = enc.encoding;
}
var isBuffer = false;
if (enc === null || enc === undefined) {
isBuffer = true;
enc = "base64";
}

var stream = through(write, end);
stream.push("process.nextTick(function(){(" + cb + ")(null,");
if (isBuffer) stream.push("Buffer(");

var s = fs.createReadStream(file, { encoding: enc });
s.on("error", function (err) {
sm.emit("error", err);
});

if (opts.readFileTransform) {
s = s.pipe(
convertTransformOptionToStream(opts.readFileTransform, [file])
);
}

return s.pipe(quote()).pipe(stream);

function write(buf, enc, next) {
this.push(buf);
next();
}
function end(next) {
if (isBuffer) this.push(',"base64")');
this.push(")})");
this.push(null);
sm.emit("file", file);
next();
}
}

function readFileSync(file, enc) {
if (file === undefined) {
throw new Error('file is not resolvable');
}

function readdir(path, cb) {
var stream = through(write, end);

stream.push('process.nextTick(function(){(' + cb + ')(null,');
fs.readdir(path, function (err, src) {
if (err) {
stream.emit('error', err);
return;
}
stream.push(JSON.stringify(src));
stream.end(')})');
});
return stream;

function write (buf, enc, next) {
this.push(buf);
next();
}
function end (next) {
this.push(null);
next();
}
}

function readdirSync (path) {
var stream = through(write, end);
fs.readdir(path, function (err, src) {
if (err) {
stream.emit('error', err);
return;
}
stream.end(JSON.stringify(src));
});
return stream;

function write (buf, enc, next) {
this.push(buf);
next();
}
function end (next) {
this.push(null);
next();
}
var isBuffer = false;
if (enc === null || enc === undefined) {
isBuffer = true;
enc = "base64";
}
if (enc && typeof enc === "object" && enc.encoding) {
enc = enc.encoding;
}
var stream = fs
.createReadStream(file, { encoding: enc })
.on("error", function (err) {
sm.emit("error", err);
});

if (opts.readFileTransform) {
stream = stream.pipe(
convertTransformOptionToStream(opts.readFileTransform, [file])
);
}

stream = stream.pipe(quote()).pipe(through(write, end));

if (isBuffer) {
stream.push("Buffer(");
}
return stream;

function write(buf, enc, next) {
this.push(buf);
next();
}
function end(next) {
if (isBuffer) this.push(',"base64")');
this.push(null);
sm.emit("file", file);
next();
}
}

function readdir(path, cb) {
var stream = through(write, end);

stream.push("process.nextTick(function(){(" + cb + ")(null,");
fs.readdir(path, function (err, src) {
if (err) {
stream.emit("error", err);
return;
}
stream.push(JSON.stringify(src));
stream.end(")})");
});
return stream;

function write(buf, enc, next) {
this.push(buf);
next();
}
function end(next) {
this.push(null);
next();
}
}

function readdirSync(path) {
var stream = through(write, end);
fs.readdir(path, function (err, src) {
if (err) {
stream.emit("error", err);
return;
}
stream.end(JSON.stringify(src));
});
return stream;

function write(buf, enc, next) {
this.push(buf);
next();
}
function end(next) {
this.push(null);
next();
}
}
};
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