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'use strict';
const path = require('path');
const Promise = require('bluebird');
const fs = Promise.promisifyAll(require('fs'));
const retryPromise = require('promise-retry');
const spawn = require('cross-spawn');
const colors = require('chalk');
const debug = require('debug')('purs-loader');
const dargs = require('./dargs');
const Psc = require('./Psc');
const PsModuleMap = require('./PsModuleMap');
function connect(psModule) {
const options = psModule.options
const cache = psModule.cache
if (cache.ideServer) return Promise.resolve(psModule)
cache.ideServer = true
const connect_ = () => new Promise((resolve, reject) => {
const args = dargs(options.pscIdeArgs)
debug('attempting to connect to psc-ide-server', args)
const ideClient = spawn('psc-ide-client', args)
ideClient.stderr.on('data', data => {
debug(data.toString())
cache.ideServer = false
reject(true)
})
ideClient.stdout.once('data', data => {
debug(data.toString())
if (data.toString()[0] === '{') {
const res = JSON.parse(data.toString())
if (res.resultType === 'success') {
cache.ideServer = ideServer
resolve(psModule)
} else {
cache.ideServer = ideServer
reject(true)
}
} else {
cache.ideServer = false
reject(true)
}
})
ideClient.stdin.resume()
ideClient.stdin.write(JSON.stringify({ command: 'load' }))
ideClient.stdin.write('\n')
})
const args = dargs(Object.assign({
outputDirectory: options.output,
}, options.pscIdeArgs))
debug('attempting to start psc-ide-server', args)
const ideServer = cache.ideServer = spawn('psc-ide-server', [])
ideServer.stderr.on('data', data => {
debug(data.toString())
})
return retryPromise((retry, number) => {
return connect_().catch(error => {
if (!cache.ideServer && number === 9) {
debug(error)
console.log(
'failed to connect to or start psc-ide-server, ' +
'full compilation will occur on rebuild'
)
return Promise.resolve(psModule)
}
return retry(error)
})
}, {
retries: 9,
factor: 1,
minTimeout: 333,
maxTimeout: 333,
})
}
module.exports.connect = connect;
function rebuild(psModule) {
const options = psModule.options
const cache = psModule.cache
debug('attempting rebuild with psc-ide-client %s', psModule.srcPath)
const request = (body) => new Promise((resolve, reject) => {
const args = dargs(options.pscIdeArgs)
const ideClient = spawn('psc-ide-client', args)
var stdout = ''
var stderr = ''
ideClient.stdout.on('data', data => {
stdout = stdout + data.toString()
})
ideClient.stderr.on('data', data => {
stderr = stderr + data.toString()
})
ideClient.on('close', code => {
if (code !== 0) {
const error = stderr === '' ? 'Failed to spawn psc-ide-client' : stderr
return reject(new Error(error))
}
let res = null
try {
res = JSON.parse(stdout.toString())
debug(res)
} catch (err) {
return reject(err)
}
if (res && !Array.isArray(res.result)) {
return res.resultType === 'success'
? resolve(psModule)
: reject('psc-ide rebuild failed')
}
Promise.map(res.result, (item, i) => {
debug(item)
return formatIdeResult(item, options, i, res.result.length)
})
.then(compileMessages => {
if (res.resultType === 'error') {
if (res.result.some(item => item.errorCode === 'UnknownModule' || item.errorCode === 'UnknownName')) {
debug('unknown module, attempting full recompile')
return Psc.compile(psModule)
.then(() => PsModuleMap.makeMap(options.src).then(map => {
debug('rebuilt module map');
cache.psModuleMap = map;
}))
.then(() => request({ command: 'load' }))
.then(resolve)
.catch(() => reject('psc-ide rebuild failed'))
}
cache.errors = compileMessages.join('\n')
reject('psc-ide rebuild failed')
} else {
cache.warnings = compileMessages.join('\n')
resolve(psModule)
}
})
})
ideClient.stdin.write(JSON.stringify(body))
ideClient.stdin.write('\n')
})
return request({
command: 'rebuild',
params: {
file: psModule.srcPath,
}
})
}
module.exports.rebuild = rebuild;
function formatIdeResult(result, options, index, length) {
const srcPath = path.relative(options.context, result.filename)
const pos = result.position
const fileAndPos = `${srcPath}:${pos.startLine}:${pos.startColumn}`
let numAndErr = `[${index+1}/${length} ${result.errorCode}]`
numAndErr = options.pscIdeColors ? colors.yellow(numAndErr) : numAndErr
return fs.readFileAsync(result.filename, 'utf8').then(source => {
const lines = source.split('\n').slice(pos.startLine - 1, pos.endLine)
const endsOnNewline = pos.endColumn === 1 && pos.startLine !== pos.endLine
const up = options.pscIdeColors ? colors.red('^') : '^'
const down = options.pscIdeColors ? colors.red('v') : 'v'
let trimmed = lines.slice(0)
if (endsOnNewline) {
lines.splice(lines.length - 1, 1)
pos.endLine = pos.endLine - 1
pos.endColumn = lines[lines.length - 1].length || 1
}
// strip newlines at the end
if (endsOnNewline) {
trimmed = lines.reverse().reduce((trimmed, line, i) => {
if (i === 0 && line === '') trimmed.trimming = true
if (!trimmed.trimming) trimmed.push(line)
if (trimmed.trimming && line !== '') {
trimmed.trimming = false
trimmed.push(line)
}
return trimmed
}, []).reverse()
pos.endLine = pos.endLine - (lines.length - trimmed.length)
pos.endColumn = trimmed[trimmed.length - 1].length || 1
}
const spaces = ' '.repeat(String(pos.endLine).length)
let snippet = trimmed.map((line, i) => {
return ` ${pos.startLine + i} ${line}`
}).join('\n')
if (trimmed.length === 1) {
snippet += `\n ${spaces} ${' '.repeat(pos.startColumn - 1)}${up.repeat(pos.endColumn - pos.startColumn + 1)}`
} else {
snippet = ` ${spaces} ${' '.repeat(pos.startColumn - 1)}${down}\n${snippet}`
snippet += `\n ${spaces} ${' '.repeat(pos.endColumn - 1)}${up}`
}
return Promise.resolve(
`\n${numAndErr} ${fileAndPos}\n\n${snippet}\n\n${result.message}`
)
})
}
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