trying to get something

install.ps1

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+# get core functions
+$init_url = 'https://raw.github.com/lukesampson/scoop/master/lib/init.ps1'
+echo 'initializing...'
+iex (new-object net.webclient).downloadstring($init_url)
+
+# prep
+assert_not_installed 'scoop' 'bootstrap'
+$appdir = appdir 'scoop' 'bootstrap')
+$abs_appdir = ensure $appdir
+
+# download scoop zip
+$zipurl = 'https://github.com/lukesampson/scoop/archive/master.zip'
+$zipfile = "$abs_appdir\scoop.zip"
+echo 'downloading...'
+dl $zipurl $zipurl
+
+echo 'extracting...'
+unzip $zipurl $abs_appdir
+rm $zipurl
+
+echo 'creating stub...'
+stub "$abs_appdir\scoop.ps1"
+
+ensure_scoop_in_path
+success 'you successfully installed scoop!'
+echo 'type "scoop help" for instructions'

lib/init.ps1

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+$scoopdir = "~\appdata\local\scoop"
+$bindir = "$scoopdir\bin"
+
+# helper functions
+function dl($url,$to) { (new-object system.net.webClient).downloadFile($url,$to) }
+function env($name,$val) {
+  if($val) { [environment]::setEnvironmentVariable($name,$val,'User') } # set
+  else { [environment]::getEnvironmentVariable($name, 'User') } # get
+}
+function abort($msg) { write-host $msg -b darkred -f white; exit 1 }
+function success($msg) { write-host $msg -b darkgreen -f white; }
+function appdir($name, $version) { "$scoopdir\$name\$version" }
+function fname($path) { split-path $path -leaf }
+function ensure($dir) { if(!(test-path $dir)) { mkdir $dir > $null }; resolve-path $dir }
+function stub($path) {
+  $abs_bindir = ensure $bindir
+  $stub = "$absbindir\$(fname $path).ps1"
+
+  echo "`$rawargs = `$myInvocation.line -replace `"^`$([regex]::escape(`$myInvocation.invocationName))\s+`", `"`"" >> "$stub"
+  echo "iex `"$path `$rawargs`"" >> "$stub"
+}
+function friendly_path($path) {
+  $home = "$(resolve-path "~")"
+  return "$path" -replace ([regex]::escape($home)), "~"
+}
+function ensure_scoop_in_path { 
+  $userpath = env 'path'
+  $abs_bindir = ensure $bindir
+  if($userpath -notmatch [regex]::escape($abs_bindir)) {
+      # be aggressive and install scoop first in the path
+      echo "adding $(friendly_path $absbindir) to your user path"
+      env 'path' "$abs_bindir;$userpath"  # for future sessions
+      $env:path = "$abs_bindir;$env:path" # for this session
+  }
+}
+function installed($name, $version) { return test-path (appdir $name $version) }
+function assert_not_installed($name, $version) {
+  if(installed $name $version) {
+    abort("``$name`` ($version) is already installed.") }
+  }
+}
+function unzip($path,$to) {
+    $shell = (new-object -com shell.application)
+    $zipfiles = $shell.namespace($path).items()
+    $shell.namespace($to).copyHere($zipFiles, 4) # 4 = don't show progress dialog
+}

lib/install-ps.ps1

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+# 1. installs a powershell script to ~\appdata\local\scoop\[name]\[name].ps1
+# 2. adds a stub to ~\appdata\local\scoop\bin, to avoid path pollution
+# 3. makes sure ~\appdata\local\scoop\bin is in your path
+function install-ps($name, $url) {
+    $erroractionpreference = 'stop'
+
+    # helpers
+    function dl($url,$to) { (new-object system.net.webClient).downloadFile($url,$to) }
+    function env($name,$val) {
+        if($val) { [environment]::setEnvironmentVariable($name,$val,'User') } # set
+        else { [environment]::getEnvironmentVariable($name, 'User') } # get
+    }
+    function abort($msg) { write-host $msg -b darkred -f white; exit 1 }
+
+    # prep
+    echo "installing $name..."
+    if($name.endswith(".ps1")) { $name = $name -replace '\.ps1$', '' }
+
+    $scoopdir = "~\appdata\local\scoop"
+    $bindir = "$scoopdir\bin"
+    $appdir = "$scoopdir\$name"
+
+    if(test-path $appdir) { abort("It looks like ``$name`` is already installed. If you'd like to re-install, please run ``rmdir ~\appdata\local\scoop\$name`` first.") }
+
+    # install
+    mkdir $appdir > $null
+    $appdir = resolve-path $appdir
+    echo "downloading $url..."
+    dl $url "$appdir\$name.ps1"
+
+    # binstub
+    echo "creating stub in ~\appdata\local\bin"
+    if(!(test-path $bindir)) { mkdir $bindir > $null }
+    $bindir = resolve-path $bindir
+
+    echo "`$rawargs = `$myInvocation.line -replace `"^`$([regex]::escape(`$myInvocation.invocationName))\s+`", `"`"" >> "$bindir\$name.ps1"
+    echo "iex `"$appdir\$name.ps1 `$rawargs`"" >> "$bindir\$name.ps1"
+
+    # ensure path
+    $userpath = env 'path'
+    if($userpath -notmatch [regex]::escape($bindir)) {
+        echo "adding ~\appdata\local\bin to your user path"
+        env 'path' "$userpath;$bindir"  # for future sessions
+        $env:path = "$env:path;$bindir" # for this session
+    }
+
+    echo "done!"
+}

lib/scoop.ps1

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+echo "hi, this is scoop!"