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// npm install command
var npm = require("../npm"),
utils = require("./utils"),
method = utils.method,
fail = utils.fail,
succeed = utils.succeed,
bind = utils.bind,
queue = require("./utils/queue").queue,
fetch = require("./utils/fetch"),
copy = require("./utils/copy"),
sys = require("sys"),
posix = require("posix"),
path = require("path");
module.exports = install;
function install (tarball, name) {
var ROOT = path.join(process.ENV.HOME, ".node_libraries"),
packageRoot = path.join(ROOT, name)
targetDir = path.join(packageRoot, "package"),
targetTgz = path.join(targetDir, name+".tgz"),
p = new process.Promise;
// if the targetDir already exists, then abort.
posix.stat(targetDir)
.addCallback(fail(p, targetDir + " exists."))
.addErrback(function () {
if (tarball.match(/^https?:\/\//)) {
return fetchAndInstall(tarball, name)
.addCallback(succeed(p))
.addErrback(fail(p, "fetchAndInstall failed"));
}
// install from a file.
if (tarball.indexOf("file://") === 0) tarball = tarball.substr("file://".length);
posix.stat(tarball)
.addErrback(fail(p, "tarball not found: "+tarball))
.addCallback(function () {
queue([
// make the directory
ensureDir(targetDir, 0755),
// copy the tarball into it.
bind(copy, null, tarball, targetTgz),
// cd into that
method(process, "chdir", targetDir),
// unpack
unpackTar(targetTgz),
// read the json
readJson(path.join(targetDir, "package.json"), name),
// link up the "main", if there is one.
linkMain(name, path.join(packageRoot, "index.js"), targetDir),
// run the "make", if there is one.
runMake(name)
// success!
], function (f) { return f() })
.addCallback(succeed(p, "successfully installed "+name))
.addErrback(fail(p));
});
});
return p;
};
function fetchAndInstall (tarball, name) {
var p = new process.Promise;
var target = path.join("/tmp", "npm-"+name+"-"+tarball.replace(/[^a-zA-Z0-9]/g, "_")+".tgz");
fetch(tarball, target)
.addErrback(fail(p, "Could not fetch "+tarball+" to "+target))
.addCallback(function () {
install(target, name)
.addCallback(succeed(p, "Succeeded from within fetchAndInstall"))
.addErrback(fail(p, "Failed from within fetchAndInstall"));
});
return p;
};
function ensureDir (dir, chmod) { return function () {
var dirs = dir.split("/"),
walker = [""];
return queue(dirs, function (d) {
var p = new process.Promise;
walker.push(d);
var dir = walker.join("/");
posix.stat(dir)
.addErrback(function () {
posix.mkdir(dir, chmod)
.addCallback(succeed(p))
.addErrback(fail(p, "Failed to mkdir ["+walker.join("/")+"]"));
})
.addCallback(function (s) {
if (s.isDirectory()) p.emitSuccess();
else p.emitError("Failed to mkdir "+dir+": File exists");
});
return p;
});
}};
// TODO: Do the unpacking in JS somehow, maybe?
function unpackTar (tarball) { return function () {
utils.log("about to unpack "+tarball+" in the cwd of "+process.cwd());
var p = new process.Promise;
process.createChildProcess("tar", ["xzvf", tarball, "--strip", "1"])
.addListener("error", function (chunk) {
if (chunk) process.stdio.writeError(chunk)
})
.addListener("output", function (chunk) {
if (chunk) process.stdio.write(chunk)
})
.addListener("exit", function (code) {
p[code ? "emitError" : "emitSuccess"](code);
});
return p;
}};
function readJson (jsonFile, name) { return function () {
var p = new process.Promise;
posix.cat(jsonFile)
.addErrback(fail(p, "Could not read "+jsonFile))
.addCallback(function (json) {
try {
json = JSON.parse(json);
npm.set(name, json);
p.emitSuccess();
} catch (ex) {
p.emitError("Failed to parse json\n"+ex.message);
}
});
return p;
}};
function linkMain (name, proxyFile, packageRoot) { return function () {
var data = npm.get(name);
if (!data.main) return;
var p = new process.Promise;
// write out an index.js at ROOT/<name>/index.js
// which proxies to ROOT/<name>/package/<main>
var code =
"// generated by npm, please don't touch!\n"+
"module.exports=require("+
JSON.stringify(path.join(packageRoot, data.main)) +
");\n";
posix.open(proxyFile,
process.O_CREAT | process.O_EXCL | process.O_WRONLY, 0755)
.addErrback(fail(p, "Could not open "+proxyFile))
.addCallback(function (fd) {
posix.write(fd, code, "ascii")
.addErrback(fail(p, "Could not write to "+proxyFile))
.addCallback(succeed(p));
});
return p;
}};
function runMake (name) { return function () {
var data = npm.get(name);
if (!data.make) return;
var p = new process.Promise;
sys.exec(data.make)
.addErrback(fail(p, "Failed to run make command: "+data.make))
.addCallback(succeed(p));
return p;
}};
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