1 files changed, 111 insertions, 0 deletions
diff --git a/node_modules/which/lib/index.js b/node_modules/which/lib/index.js
new file mode 100644
index 0000000..2fd358b
--- /dev/null
+++ b/node_modules/which/lib/index.js
@@ -0,0 +1,111 @@
+const { isexe, sync: isexeSync } = require('isexe')
+const { join, delimiter, sep, posix } = require('path')
+
+const isWindows = process.platform === 'win32'
+
+// used to check for slashed in commands passed in. always checks for the posix
+// seperator on all platforms, and checks for the current separator when not on
+// a posix platform. don't use the isWindows check for this since that is mocked
+// in tests but we still need the code to actually work when called. that is also
+// why it is ignored from coverage.
+/* istanbul ignore next */
+const rSlash = new RegExp(`[${posix.sep}${sep === posix.sep ? '' : sep}]`.replace(/(\\)/g, '\\$1'))
+const rRel = new RegExp(`^\\.${rSlash.source}`)
+
+const getNotFoundError = (cmd) =>
+  Object.assign(new Error(`not found: ${cmd}`), { code: 'ENOENT' })
+
+const getPathInfo = (cmd, {
+  path: optPath = process.env.PATH,
+  pathExt: optPathExt = process.env.PATHEXT,
+  delimiter: optDelimiter = delimiter,
+}) => {
+  // If it has a slash, then we don't bother searching the pathenv.
+  // just check the file itself, and that's it.
+  const pathEnv = cmd.match(rSlash) ? [''] : [
+    // windows always checks the cwd first
+    ...(isWindows ? [process.cwd()] : []),
+    ...(optPath || /* istanbul ignore next: very unusual */ '').split(optDelimiter),
+  ]
+
+  if (isWindows) {
+    const pathExtExe = optPathExt ||
+      ['.EXE', '.CMD', '.BAT', '.COM'].join(optDelimiter)
+    const pathExt = pathExtExe.split(optDelimiter).flatMap((item) => [item, item.toLowerCase()])
+    if (cmd.includes('.') && pathExt[0] !== '') {
+      pathExt.unshift('')
+    }
+    return { pathEnv, pathExt, pathExtExe }
+  }
+
+  return { pathEnv, pathExt: [''] }
+}
+
+const getPathPart = (raw, cmd) => {
+  const pathPart = /^".*"$/.test(raw) ? raw.slice(1, -1) : raw
+  const prefix = !pathPart && rRel.test(cmd) ? cmd.slice(0, 2) : ''
+  return prefix + join(pathPart, cmd)
+}
+
+const which = async (cmd, opt = {}) => {
+  const { pathEnv, pathExt, pathExtExe } = getPathInfo(cmd, opt)
+  const found = []
+
+  for (const envPart of pathEnv) {
+    const p = getPathPart(envPart, cmd)
+
+    for (const ext of pathExt) {
+      const withExt = p + ext
+      const is = await isexe(withExt, { pathExt: pathExtExe, ignoreErrors: true })
+      if (is) {
+        if (!opt.all) {
+          return withExt
+        }
+        found.push(withExt)
+      }
+    }
+  }
+
+  if (opt.all && found.length) {
+    return found
+  }
+
+  if (opt.nothrow) {
+    return null
+  }
+
+  throw getNotFoundError(cmd)
+}
+
+const whichSync = (cmd, opt = {}) => {
+  const { pathEnv, pathExt, pathExtExe } = getPathInfo(cmd, opt)
+  const found = []
+
+  for (const pathEnvPart of pathEnv) {
+    const p = getPathPart(pathEnvPart, cmd)
+
+    for (const ext of pathExt) {
+      const withExt = p + ext
+      const is = isexeSync(withExt, { pathExt: pathExtExe, ignoreErrors: true })
+      if (is) {
+        if (!opt.all) {
+          return withExt
+        }
+        found.push(withExt)
+      }
+    }
+  }
+
+  if (opt.all && found.length) {
+    return found
+  }
+
+  if (opt.nothrow) {
+    return null
+  }
+
+  throw getNotFoundError(cmd)
+}
+
+module.exports = which
+which.sync = whichSync