diff options
Diffstat (limited to 'node_modules/osenv/osenv.js')
-rw-r--r-- | node_modules/osenv/osenv.js | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/node_modules/osenv/osenv.js b/node_modules/osenv/osenv.js new file mode 100644 index 000000000..702a95b98 --- /dev/null +++ b/node_modules/osenv/osenv.js @@ -0,0 +1,72 @@ +var isWindows = process.platform === 'win32' +var path = require('path') +var exec = require('child_process').exec +var osTmpdir = require('os-tmpdir') +var osHomedir = require('os-homedir') + +// looking up envs is a bit costly. +// Also, sometimes we want to have a fallback +// Pass in a callback to wait for the fallback on failures +// After the first lookup, always returns the same thing. +function memo (key, lookup, fallback) { + var fell = false + var falling = false + exports[key] = function (cb) { + var val = lookup() + if (!val && !fell && !falling && fallback) { + fell = true + falling = true + exec(fallback, function (er, output, stderr) { + falling = false + if (er) return // oh well, we tried + val = output.trim() + }) + } + exports[key] = function (cb) { + if (cb) process.nextTick(cb.bind(null, null, val)) + return val + } + if (cb && !falling) process.nextTick(cb.bind(null, null, val)) + return val + } +} + +memo('user', function () { + return ( isWindows + ? process.env.USERDOMAIN + '\\' + process.env.USERNAME + : process.env.USER + ) +}, 'whoami') + +memo('prompt', function () { + return isWindows ? process.env.PROMPT : process.env.PS1 +}) + +memo('hostname', function () { + return isWindows ? process.env.COMPUTERNAME : process.env.HOSTNAME +}, 'hostname') + +memo('tmpdir', function () { + return osTmpdir() +}) + +memo('home', function () { + return osHomedir() +}) + +memo('path', function () { + return (process.env.PATH || + process.env.Path || + process.env.path).split(isWindows ? ';' : ':') +}) + +memo('editor', function () { + return process.env.EDITOR || + process.env.VISUAL || + (isWindows ? 'notepad.exe' : 'vi') +}) + +memo('shell', function () { + return isWindows ? process.env.ComSpec || 'cmd' + : process.env.SHELL || 'bash' +}) |