Created
July 27, 2010 11:55
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Load view/update functions from .js files and loads them to CouchDB.
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var fs = require('fs'); | |
var http = require('http'); | |
var path = require('path'); | |
var console = require('sys'); | |
var url = require('url'); | |
var Script = process.binding('evals').Script; | |
var couchURL = url.parse(process.argv[2]); | |
var couch = http.createClient(couchURL.port, couchURL.hostname); | |
function loadScript(designPath, basename) { | |
var fullPath = path.join(designPath, basename); | |
var design = {}; | |
new Script(fs.readFileSync(fullPath), fullPath).runInNewContext({design: design}); | |
return design; | |
} | |
var pendingCount = 0; | |
function updateDesignDoc(name, data) { | |
var designId = '_design/' + name; | |
var get = couch.request('GET', couchURL.pathname + '/' + designId); | |
get.end(); | |
get.on('response', function (getResponse){ | |
if (getResponse.statusCode == 404) { | |
data._id = designId; | |
updateCouch('PUT', data); | |
} else { | |
var buffer = ''; | |
getResponse.on('data', function(chunk){ buffer += chunk; }); | |
getResponse.on('end', function(){ | |
var doc = JSON.parse(buffer); | |
data._id = doc._id; | |
data._rev = doc._rev; | |
updateCouch('PUT', data); | |
}); | |
} | |
}); | |
pendingCount++; | |
} | |
function updateCouch(method, doc) { | |
var json = JSON.stringify(doc); | |
var req = couch.request(method, couchURL.pathname + '/' + doc._id, { | |
'Content-Type': 'application/json', | |
'Content-Length': json.length }); | |
req.write(json); | |
req.end(); | |
req.on('response', function(resp){ | |
var data = ''; | |
resp.on('data', function(chunk){ data += chunk; }); | |
resp.on('end', function(){ | |
console.log(doc._id + ' [' + method + ']: ' + data); | |
pendingCount--; | |
}); | |
}); | |
} | |
function designsFor(name, callback) { | |
var baseDir = path.join(__dirname, name); | |
fs.readdirSync(baseDir).forEach(function(designName) { | |
var designPath = path.join(baseDir, designName); | |
var stats = fs.statSync(designPath); | |
if (stats.isDirectory()) { | |
var files = fs.readdirSync(designPath).filter(function(fn){ | |
return path.extname(fn) == '.js'; | |
}); | |
callback(designName, designPath, files); | |
} | |
}); | |
} | |
designsFor('designs', function(designName, designPath, scripts){ | |
var designDoc = {}; | |
scripts.forEach(function(fn){ | |
var name = fn.substring(0, fn.length - 3); | |
try { | |
console.log('[' + designName + '/' + fn + '] loading...'); | |
var design = loadScript(designPath, fn); | |
if (design.view) { | |
console.log(' found view: ' + name); | |
if (!designDoc.views) designDoc.views = {}; | |
if (design.view.map) { | |
console.log(' - map function found'); | |
designDoc.views[name] = { map: design.view.map.toString() }; | |
if (design.view.reduce) { | |
console.log(' - reduce function found'); | |
designDoc.views[name].reduce = design.view.reduce.toString(); | |
} | |
} | |
} | |
if (design.update) { | |
console.log(' found update: ' + name); | |
if (!designDoc.updates) designDoc.updates = {}; | |
designDoc.updates[name] = design.update.toString(); | |
} | |
} catch(e) { | |
console.log("unable to load design script '" + designName + '/' + fn + "': " + e); | |
} | |
}); | |
updateDesignDoc(designName, designDoc); | |
}); | |
var timeout; | |
timeout = setInterval(function(){ | |
if (pendingCount == 0) { | |
console.log('Done.'); | |
clearTimeout(timeout); | |
} | |
}, 100); |
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