Merge pull request #143 from heetbeet:master

Add juliaup-init installer for Windows, Linux and OSX

deploy/shellscript/juliaup-init.cmd

@@ -0,0 +1,229 @@
+<# :
+:: Powershell trampoline
+@echo off
+setlocal 
+set "_arg1=%~1" &set "_arg2=%~2" &set "_arg3=%~3" &set "_arg4=%~4" &set "_arg5=%~5" &set "_arg6=%~6" &set "_arg7=%~7" &set "_arg8=%~8" &set "_arg9=%~9"
+powershell -NoLogo -NoP -Exec ByPass "iex (Get-Content '%~f0' -Raw)"
+
+:: Pause if this is a cmd pop-up from Explorer
+if /i "%comspec% /c __%~0_ _" equ "%cmdcmdline:"=_%" pause
+goto :EOF
+#>
+
+
+# Choose between Powershell or Batch arguments
+if(-not $args){
+    $cmdargs = @($env:_arg1, $env:_arg2, $env:_arg3, $env:_arg4, $env:_arg5, $env:_arg6, $env:_arg7, $env:_arg8, $env:_arg9).Where({ $_ -ne $null})
+} else {
+    $cmdargs = $args
+}
+
+function Remove-FromUserPath {
+    param (
+        [Parameter(Mandatory=$true)]
+        [ValidateNotNullOrEmpty()]
+        [string] 
+        $dir
+    )
+
+    $dir = [io.path]::GetFullPath($dir)
+    $path = [Environment]::GetEnvironmentVariable("PATH", [System.EnvironmentVariableTarget]::User)
+    if (";$path;".Contains(";$dir;")) {
+        $path=((";$path;").replace(";$dir;", ";")).Trim(';')
+        [Environment]::SetEnvironmentVariable("PATH", $path, [EnvironmentVariableTarget]::User)
+        return
+    }
+}
+
+
+function Add-ToUserPath {
+    param (
+        [Parameter(Mandatory=$true)]
+        [ValidateNotNullOrEmpty()]
+        [string] 
+        $dir
+    )
+
+    $dir = [io.path]::GetFullPath($dir)
+    $path = [Environment]::GetEnvironmentVariable("PATH", [System.EnvironmentVariableTarget]::User)
+    if (!(";$path;".Contains(";$dir;"))) {
+        [Environment]::SetEnvironmentVariable("PATH", "$dir;$path", [EnvironmentVariableTarget]::User)
+        return
+    }
+}
+
+function Set-HighestEncryption {
+    # Implementation adapted from the Chocolatey installer script,
+    # see: https://chocolatey.org/install.ps1
+
+    # Attempt to set highest encryption available for SecurityProtocol.
+    # PowerShell will not set this by default (until maybe .NET 4.6.x). This
+    # will typically produce a message for PowerShell v2 (just an info message
+    # though)
+    $OldSPM = [System.Net.ServicePointManager]::SecurityProtocol
+    try {
+        # Set TLS 1.2 (3072) which is currently the highest protocol enabled on
+        # static.rust-lang.org. Favor TLS 1.3 (12288) with a TLS 1.2 fallback
+        # when 1.3 is supported. Use integers because the enumeration values
+        # for TLS 1.2 won't exist in .NET 4.0, even though they are addressable
+        # if .NET 4.5+ is installed (.NET 4.5 is an in-place upgrade).
+        [System.Net.ServicePointManager]::SecurityProtocol = 3072
+    } catch {
+        Write-Failure @'
+rustup: Unable to set PowerShell to use TLS 1.2 due to old .NET Framework
+installed. If you see underlying connection closed or trust errors, you may
+need to do one or more of the following: (1) upgrade to .NET Framework 4.5+ and
+PowerShell v3+, (2) download an alternative install method from
+https://rustup.rs/.
+'@
+    } finally {
+        [System.Net.ServicePointManager]::SecurityProtocol = $OldSPM
+    }
+}
+
+$JULIAUP_UPDATE_ROOT='https://github.com/JuliaLang/juliaup/releases/latest/download/'
+$JULIAUP_INSTALL_DIR=(Resolve-Path '~/.juliaup')
+
+$usage = @'
+juliaup-init: the installer for juliaup
+
+USAGE:
+    juliaup-init [FLAGS] [OPTIONS]
+
+FLAGS:
+    -y, --yes               Answer y to all confirmation prompts.
+        --no-add-to-path    Don't add to user PATH environment variable
+    -h, --help              Prints help information
+
+OPTIONS:
+    -p, --path              Custom install path
+
+'@
+
+# Display help
+if(($cmdargs.Contains('-h')) -or ($cmdargs.Contains('--help'))){
+    Write-Host $usage
+    Exit
+}
+
+
+$dirprompt = @"
+
+Install juliaup to $JULIAUP_INSTALL_DIR ?
+    [y] to confirm
+    [n] to abort
+    ... Or enter a custom location
+"@
+
+
+$pathprompt = @'
+
+Add juliaup.exe and julia.exe to user $PATH variable?
+    [y] to confirm
+    [n] to deny
+'@
+
+
+# User-defined path
+if(($cmdargs.Contains('-p')) -or ($cmdargs.Contains('--path'))){
+    $i = [array]::indexof($cmdargs, '-p')
+    if($i -lt 0){$i = [array]::indexof($cmdargs, '--path')}
+    $JULIAUP_INSTALL_DIR = $cmdargs[$i+1]
+
+# Ask user for path
+} elseif((-not $cmdargs.Contains('-y')) -and (-not $cmdargs.Contains('--yes'))) {
+    $ans = ""
+    Write-Host $dirprompt
+    while($ans -eq ""){
+        $ans = Read-Host -Prompt ">>> [y/n/...]"
+        if ($ans -ne "") {
+            if (($ans -eq "Y") -or ($ans -eq "y")){
+                #nothing
+            } elseif (($ans -eq "N") -or ($ans -eq "n")) {
+                Exit
+            } else {
+                $JULIAUP_INSTALL_DIR = $ans
+            }
+        }
+    }
+}
+
+$doAddPath = $true
+if($cmdargs.Contains('--no-add-to-path')){
+    $doAddPath = $false
+} else {
+    if((-not $cmdargs.Contains('-y')) -and (-not $cmdargs.Contains('--yes'))) {
+        $ans = ""
+        Write-Host $pathprompt
+        while(($ans -ne "Y") -and ($ans -ne "y") -and ($ans -ne "N") -and ($ans -ne "n")){
+            $ans = Read-Host -Prompt ">>> [y/n]"
+
+            if (($ans -eq "N") -or ($ans -eq "n")){
+                $doAddPath = $false
+            }
+        }
+    }
+}
+
+
+# Create temp directory
+$tempFolderPath = Join-Path $Env:Temp $(New-Guid)
+New-Item -Type Directory -Force -Path $tempFolderPath | Out-Null
+
+
+$arch = 'x86_64-pc-windows-msvc'
+if ([IntPtr]::size -eq 4){
+    $arch = 'i686-pc-windows-msvc'
+}
+
+$url = "$JULIAUP_UPDATE_ROOT/${arch}.zip"
+$dst = "$tempFolderPath/${arch}.zip"
+$dstdir = "$tempFolderPath/${arch}"
+Write-Host ""
+Write-Host "info: downloading installer"
+
+# Suppress progress bar
+$tmppref = $global:ProgressPreference
+$global:ProgressPreference = "SilentlyContinue"
+
+Set-HighestEncryption
+try {
+    Invoke-WebRequest $url -OutFile $dst
+}
+catch {
+    (New-Object System.Net.WebClient).DownloadFile($url, $dst)
+}
+
+Expand-Archive -Path $dst -DestinationPath $dstdir
+
+# Restore progress bar
+$global:ProgressPreference = $tmppref
+
+
+# Move extracted to the final location
+$binDir = "$JULIAUP_INSTALL_DIR/bin"
+Remove-Item -Recurse -Force $binDir -ErrorAction Ignore
+New-Item -Type Directory -Force -Path $binDir | Out-Null
+
+Get-ChildItem -Path $dstdir -Recurse -File |
+    Move-Item -Destination {
+      Join-Path $binDir (Split-Path $_ -leaf)
+    }
+
+
+# Clear path from user PATH; then add it back
+Remove-FromUserPath "$binDir"
+if ($doAddPath){
+    Add-ToUserPath "$binDir"
+    Write-Host 'Close and re-open any terminal to reload $PATH variable'
+}
+
+Remove-Item -Recurse -Force $tempFolderPath -ErrorAction Ignore
+
+# TODO: how can we reliably symlink on Windows?
+Copy-Item -Path "$binDir/julialauncher.exe" -Destination "$binDir/julia.exe" -Force
+
+# Trigger Julia download
+& "$binDir/julia.exe" -e nothing
+
+Write-Host 'Run `juliaup --help` for help'