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const path = require('path')
const shellQuote = require('shell-quote')
const childProcess = require('child_process')
// Map from full process name to binary that starts the process
// We can't just re-use full process name, because it will spawn a new instance
// of the app every time
const COMMON_EDITORS_OSX = require('./editor-info/osx')
const COMMON_EDITORS_LINUX = require('./editor-info/linux')
const COMMON_EDITORS_WIN = require('./editor-info/windows')
module.exports = function guessEditor (specifiedEditor) {
if (specifiedEditor) {
return shellQuote.parse(specifiedEditor)
}
// We can find out which editor is currently running by:
// `ps x` on macOS and Linux
// `Get-Process` on Windows
try {
if (process.platform === 'darwin') {
const output = childProcess.execSync('ps x').toString()
const processNames = Object.keys(COMMON_EDITORS_OSX)
for (let i = 0; i < processNames.length; i++) {
const processName = processNames[i]
if (output.indexOf(processName) !== -1) {
return [COMMON_EDITORS_OSX[processName]]
}
}
} else if (process.platform === 'win32') {
const output = childProcess
.execSync('powershell -Command "Get-Process | Select-Object Path"', {
stdio: ['pipe', 'pipe', 'ignore']
})
.toString()
const runningProcesses = output.split('\r\n')
for (let i = 0; i < runningProcesses.length; i++) {
// `Get-Process` sometimes returns empty lines
if (!runningProcesses[i]) {
continue
}
const fullProcessPath = runningProcesses[i].trim()
const shortProcessName = path.basename(fullProcessPath)
if (COMMON_EDITORS_WIN.indexOf(shortProcessName) !== -1) {
return [fullProcessPath]
}
}
} else if (process.platform === 'linux') {
// --no-heading No header line
// x List all processes owned by you
// -o comm Need only names column
const output = childProcess
.execSync('ps x --no-heading -o comm --sort=comm')
.toString()
const processNames = Object.keys(COMMON_EDITORS_LINUX)
for (let i = 0; i < processNames.length; i++) {
const processName = processNames[i]
if (output.indexOf(processName) !== -1) {
return [COMMON_EDITORS_LINUX[processName]]
}
}
}
} catch (error) {
// Ignore...
}
// Last resort, use old skool env vars
if (process.env.VISUAL) {
return [process.env.VISUAL]
} else if (process.env.EDITOR) {
return [process.env.EDITOR]
}
return [null]
}