tools: support for embedded python

docs/en/api-guides/tools/idf-tools-notes.inc

@@ -62,4 +62,14 @@ On Linux and macOS, it is recommended to install ninja using the OS-specific pac
 .. tool-dfu-util-notes
 
 
+---
+
+.. tool-idf-python-notes
+
+
+---
+
+.. tool-idf-python-wheels-notes
+
+
 ---

docs/en/api-guides/tools/idf-windows-installer.rst

@@ -0,0 +1,49 @@
+IDF Windows Installer
+=====================
+
+Command-line parameters
+-----------------------
+
+Windows Installer `esp-idf-tools-setup` provides the following command-line parameters:
+
+* ``/GITRECURSIVE=[yes|no]`` - Clone recursively all git repository submodules. Default: yes``
+* ``/GITREPO=[URL|PATH]`` - URL of repository to clone ESP-IDF. Default: https://github.com/espressif/esp-idf.git
+* ``/GITRESET=[yes|no]`` - Enable/Disable git reset of repository during installation. Default: yes.
+* ``/HELP`` - Display command line options provided by Inno Setup installer.
+* ``/IDFDIR=[PATH]`` - Path to directory where it will be installed. Default: ``{userdesktop}\esp-idf}``
+* ``/IDFVERSION=[v4.3|v4.1|master]`` - Use specific IDF version. E.g. v4.1, v4.2, master. Default: empty, pick the first version in the list.
+* ``/IDFVERSIONSURL=[URL]`` - Use URL to download list of IDF versions. Default: https://dl.espressif.com/dl/esp-idf/idf_versions.txt
+* ``/LOG=[PATH]`` - Store installation log file in specific directory. Default: empty.
+* ``/OFFLINE=[yes|no]`` - Execute installation of Python packages by PIP in offline mode. The same result can be achieved by setting the environment variable PIP_NO_INDEX. Default: no.
+* ``/USEEMBEDDEDPYTHON=[yes|no]`` - Use Embedded Python version for the installation. Set to ``no`` to allow Python selection screen in the installer. Default: yes.
+* ``/PYTHONWHEELSURL=[URL]`` - Specify URLs to PyPi repositories for resolving binary Python Wheel dependencies. The same result can be achieved by setting the environment variable PIP_EXTRA_INDEX_URL. Default: https://dl.espressif.com/pypi
+* ``/SKIPSYSTEMCHECK=[yes|no]`` - Skip System Check page. Default: no.
+* ``/VERYSILENT /SUPPRESSMSGBOXES /SP- /NOCANCEL`` - Perform silent installation.
+
+Unattended installation
+-----------------------
+
+The unattended installation of IDF can be achieved by following command-line parameters:
+
+.. code-block:: batch
+
+    esp-idf-tools-setup-x.x.exe /VERYSILENT /SUPPRESSMSGBOXES /SP- /NOCANCEL
+
+The installer detaches its process from the command-line. Waiting for installation to finish could be achieved by following PowerShell script:
+
+.. code-block:: powershell
+
+    esp-idf-tools-setup-x.x.exe /VERYSILENT /SUPPRESSMSGBOXES /SP- /NOCANCEL
+    $InstallerProcess = Get-Process esp-idf-tools-setup
+    Wait-Process -Id $InstallerProcess.id
+
+Custom Python and custom location of Python wheels
+--------------------------------------------------
+
+The IDF installer is using by default embedded Python with reference to Python Wheel mirror.
+
+Following parameters allows to select custom Python and custom location of Python wheels:
+
+.. code-block:: batch
+
+    esp-idf-tools-setup-x.x.exe /USEEMBEDDEDPYTHON=no /PYTHONWHEELSURL=https://pypi.org/simple/

docs/en/api-guides/tools/index.rst

@@ -7,3 +7,4 @@ Tools
    IDF Tools <idf-tools>
    IDF Monitor <idf-monitor>
    IDF Docker image <idf-docker-image>
+   IDF Windows Installer <idf-windows-installer>

docs/en/get-started/windows-setup.rst

@@ -34,7 +34,7 @@ ESP-IDF Tools Installer
 
 The easiest way to install ESP-IDF's prerequisites is to download the ESP-IDF Tools installer from this URL:
 
-https://dl.espressif.com/dl/esp-idf-tools-setup-2.3.exe
+https://dl.espressif.com/dl/esp-idf-tools-setup-2.4.exe
 
 .. IMPORTANT: Next time this link is updated, please go to get-started/index.rst and rewrite the section under "Alternative File Downloads ... Windows". Then delete this comment.
 

docs/zh_CN/api-guides/tools/idf-tools-notes.inc

@@ -64,4 +64,14 @@ On Linux and macOS, it is recommended to install ninja using the OS package mana
 .. tool-dfu-util-notes
 
 
+---
+
+.. tool-idf-python-notes
+
+
+---
+
+.. tool-idf-python-wheels-notes
+
+
 ---

docs/zh_CN/api-guides/tools/idf-windows-installer.rst

@@ -0,0 +1 @@
+.. include:: ../../../en/api-guides/tools/idf-windows-installer.rst

docs/zh_CN/api-guides/tools/index.rst

@@ -7,3 +7,4 @@
    IDF Tools <idf-tools>
    IDF 监视器 <idf-monitor>
    IDF Docker image <idf-docker-image>
+   IDF Windows Installer <idf-windows-installer>

docs/zh_CN/get-started/windows-setup.rst

@@ -33,7 +33,7 @@ ESP-IDF 工具安装器
 
 安装 ESP-IDF 必备工具最简易的方式是下载 ESP-IDF 工具安装器，地址如下：
 
-https://dl.espressif.com/dl/esp-idf-tools-setup-2.3.exe
+https://dl.espressif.com/dl/esp-idf-tools-setup-2.4.exe
 
 .. 重要：下次更新此链接时，请重新写文件 get-started/index.rst 中“其它文件下载方式”这一章节，然后将此条注意事项删除。
 

tools/idf_tools.py

@@ -1310,6 +1310,19 @@ def action_install(args):
         tool_obj.install(tool_version)
 
 
+def get_wheels_dir():
+    tools_info = load_tools_info()
+    wheels_package_name = 'idf-python-wheels'
+    if wheels_package_name not in tools_info:
+        return None
+    wheels_package = tools_info[wheels_package_name]
+    recommended_version = wheels_package.get_recommended_version()
+    wheels_dir = wheels_package.get_path_for_version(recommended_version)
+    if not os.path.exists(wheels_dir):
+        return None
+    return wheels_dir
+
+
 def action_install_python_env(args):
     idf_python_env_path, _, virtualenv_python = get_python_env_path()
 
@@ -1339,6 +1352,15 @@ def action_install_python_env(args):
     run_args += ['-r', requirements_txt]
     if args.extra_wheels_dir:
         run_args += ['--find-links', args.extra_wheels_dir]
+    if args.no_index:
+        run_args += ['--no-index']
+    if args.extra_wheels_url:
+        run_args += ['--extra-index-url', args.extra_wheels_url]
+
+    wheels_dir = get_wheels_dir()
+    if wheels_dir is not None:
+        run_args += ['--find-links', wheels_dir]
+
     info('Installing Python packages from {}'.format(requirements_txt))
     subprocess.check_call(run_args, stdout=sys.stdout, stderr=sys.stderr)
 
@@ -1542,6 +1564,8 @@ def main(argv):
                                     action='store_true')
     install_python_env.add_argument('--extra-wheels-dir', help='Additional directories with wheels ' +
                                     'to use during installation')
+    install_python_env.add_argument('--extra-wheels-url', help='Additional URL with wheels', default='https://dl.espressif.com/pypi')
+    install_python_env.add_argument('--no-index', help='Work offline without retrieving wheels index')
 
     if IDF_MAINTAINER:
         add_version = subparsers.add_parser('add-version', help='Add or update download info for a version')

tools/tools.json

@@ -627,6 +627,73 @@
           }
         }
       ]
+    },
+    {
+      "description": "Embeddable Python distribution",
+      "export_paths": [],
+      "export_vars": {},
+      "info_url": "https://github.com/espressif/esp-idf/tree/master/tools/windows/",
+      "install": "never",
+      "license": "PSF License",
+      "name": "idf-python",
+      "platform_overrides": [
+        {
+          "install": "on_request",
+          "platforms": [
+            "win64"
+          ]
+        }
+      ],
+      "version_cmd": [
+        "python",
+        "--version"
+      ],
+      "version_regex": "Python ([0-9.]+)",
+      "versions": [
+        {
+          "name": "3.9.1",
+          "status": "recommended",
+          "win64": {
+            "sha256": "d5a0e625dd5b2bc6872de90292d71009c17e2396e3d1575d886a94d0dfb00c87",
+            "size": 20362758,
+            "url": "https://dl.espressif.com/dl/idf-python/idf-python-3.9.1-embed-win64.zip"
+          }
+        }
+      ]
+    },
+    {
+      "description": "Python Wheels distribution bundled for the specific version of IDF and Python",
+      "export_paths": [],
+      "export_vars": {},
+      "info_url": "https://github.com/espressif/esp-idf/tree/master/tools/windows/",
+      "install": "never",
+      "license": "Open-source licenses",
+      "name": "idf-python-wheels",
+      "platform_overrides": [
+        {
+          "install": "always",
+          "platforms": [
+            "win64"
+          ]
+        }
+      ],
+      "version_cmd": [
+        "cmd",
+        "/c",
+        "echo idf4.3_py3.9_2021-01-07"
+      ],
+      "version_regex": "(idf4.3_py3.9_2021-01-07)",
+      "versions": [
+        {
+          "name": "idf4.3_py3.9_2021-01-07",
+          "status": "recommended",
+          "win64": {
+            "sha256": "2a33dbaa106aec9c5098b1af46f04c69923be947291c19855ff355b9707314b6",
+            "size": 8316997,
+            "url": "https://dl.espressif.com/dl/idf-python-wheels/idf-python-wheels-idf4.3_py3.9_2021-01-07-win64.zip"
+          }
+        }
+      ]
     }
   ],
   "version": 1

tools/windows/tool_setup/README.md

@@ -12,9 +12,9 @@ Some functionality of the installer depends on additional programs:
 
 * [7-zip](https://www.7-zip.org) — used to extract downloaded IDF archives.
 
-* [cmdlinerunner](cmdlinerunner/cmdlinerunner.c) — a helper DLL used to run external command line programs from the installer, capture live console output, and get the exit code.
+* [cmdlinerunner](cmdlinerunner/cmdlinerunner.c) — a helper DLL used to run external command-line programs from the installer, capture live console output, and get the exit code.
 
-## Instalation of dependencies via Chocolatey
+## Installation of dependencies via Chocolatey
 
 Run with Administrator privileges:
 
@@ -22,7 +22,7 @@ Run with Administrator privileges:
 choco install inno-download-plugin
 ```
 
-## Building the installer 
+## Building the installer
 
 ### In Docker
 
@@ -60,3 +60,47 @@ docker run --rm -v $IDF_PATH:/idf -w /idf/tools/windows/tool_setup -it $CI_DOCKE
   - `export CERTCHAIN=certchain.pem`
 
 * Run `sign_installer.sh` script. This will ask for the `key.pem` password, and produce the signed installer in the Output directory. If you plan to run the script multiple times, you may also set `KEYPASSWORD` environment variable to the `key.pem` password, to avoid the prompt.
+
+## Development and testing of the installer
+
+Development and testing of the installer can be simplified by using command line parameters which can be passed to the installer.
+
+Select Run - Parameters in Inno Setup and add parameters.
+
+Example of parameters:
+
+```
+/SKIPSYSTEMCHECK=yes /IDFVERSIONSURL=http://localhost:8000/idf_versions.txt /GITRESET=no /GITREPO=C:/projects/esp-idf /GITRECURSIVE=no
+```
+
+These combinations of parameters will result:
+* ``SKIPSYSTEMCHECK=yes`` - The screen with System Check will be skipped.
+* ``IDFVERSIONURL`` - idf_versions.txt will be downloaded from localhost:8000
+  - it's possible to add branch name into idf_versions.txt, e.g. feature/win_inst
+* ``GITRESET=no`` - Git repository won't be reset after clone, it can save time and add custom changes in case of the zip archive with repository
+* ``GITREPO`` - The version will be cloned from the specific location, e.g. from a local directory
+* ``GITRECURSIVE=no`` - The clone of the repo won't contain modules, it speeds up the cloning process. Use when modules are not necessary.
+
+Documentation of parameters is available in api-guides/tools/idf-windows-installer.rst
+
+### Testing installation in Docker with Windows containers
+
+The testing script is stored in docker-compose.yml. The test perform full silent installation and executes build of get-started example.
+
+Commands for testing multiple versions:
+
+```
+$env:IDF_VERSION="v4.1"; docker-compose.exe run idf-setup-test
+$env:IDF_VERSION="v4.0.2"; docker-compose.exe run idf-setup-test
+$env:IDF_VERSION="v3.3.4"; docker-compose.exe run idf-setup-test
+$env:IDF_VERSION="release/v4.2"; docker-compose.exe run idf-setup-test
+$env:IDF_VERSION="release/v4.1"; docker-compose.exe run idf-setup-test
+$env:IDF_VERSION="release/v4.0"; docker-compose.exe run idf-setup-test
+$env:IDF_VERSION="release/v3.3"; docker-compose.exe run idf-setup-test
+$env:IDF_VERSION="master"; docker-compose.exe run idf-setup-test
+```
+
+The installation log is not displayed immediately on the screen. It's stored in the file and it's displayed when the installation finishes. The glitch of Inno Setup is that in case of failed installation it won't terminate and it keeps hanging.
+
+Recommendation: Use Visual Studio Code with Docker plugin to work with container.
+The log file is then accessible under Docker - Containers - Container - Files - Temp - install.txt - right click - Open.

tools/windows/tool_setup/Scripts/Install-Idf.ps1

@@ -0,0 +1,15 @@
+param (
+    [string]$Installer="C:\Output\esp-idf-tools-setup-unsigned.exe",
+    [string]$IdfPath = "C:\Users\ContainerAdministrator\Desktop\esp-idf",
+    [string]$IdfVersion = "v4.1"
+)
+
+$Installer
+$IdfPath
+$IdfVersion
+
+mkdir C:\Temp
+C:\Output\esp-idf-tools-setup-unsigned.exe /VERYSILENT /LOG=C:\Temp\install.txt /SUPPRESSMSGBOXES /SP- /NOCANCEL /NORESTART /IDFVERSION=${IdfVersion}
+$InstallerProcess = Get-Process esp-idf-tools-setup-unsigned
+Wait-Process -Id $InstallerProcess.id
+Get-Content C:\Temp\install.txt

tools/windows/tool_setup/Scripts/Prepare-Cache.ps1

@@ -0,0 +1,8 @@
+param (
+    [string]$IdfVersion = "v4.1"
+)
+$ErrorActionPreference = "Stop"
+New-Item -Path C:\Users\ContainerAdministrator\ -Name .espressif -ItemType "directory"
+New-Item -Path C:\Users\ContainerAdministrator\.espressif -Name releases -ItemType "directory"
+Copy-Item -Recurse -Verbose -Path C:\Cache\dist -Destination C:\Users\ContainerAdministrator\.espressif\dist
+Copy-Item -Verbose -Path C:\Cache\releases\esp-idf-${IdfVersion}.zip -Destination C:\Users\ContainerAdministrator\.espressif\releases

tools/windows/tool_setup/Scripts/Test-Idf.ps1

@@ -0,0 +1,28 @@
+param (
+    [string]$PythonPath = "C:\Python38\",
+    [string]$IdfPath = "C:\Users\ContainerAdministrator\Desktop\esp-idf"
+)
+
+$env:PATH+=";${PythonPath}"
+Set-Location "${IdfPath}"
+#.\export.ps1
+$env:PYTHONPATH="C:\Users\ContainerAdministrator\Desktop\esp-idf\tools\"
+# Append build script and launch via link
+#Add-Content -Path ${IdfPath}\export.bat -Value ${BuildCommands}
+# timeout is necessary to fix the problem when installer is writing some final files
+# it seems that installer exits, but locks were not released yet
+Start-Sleep -s 5
+
+$WSShell = New-Object -comObject WScript.Shell
+$Shortcut = $WSShell.CreateShortcut('C:\Users\ContainerAdministrator\Desktop\ESP-IDF Command Prompt (cmd.exe).lnk')
+$Arguments = $Shortcut.Arguments -replace "/k ", "/c '"
+$Command = $Shortcut.TargetPath + ' ' + $Arguments -replace '""', '"'
+$Command += " && cd examples\get-started\blink\ && idf.py build'"
+Invoke-Expression -Command $Command
+#powershell.exe
+#C:\Windows\system32\cmd.exe /c '"C:\Users\ContainerAdministrator\.espressif\idf_cmd_init.bat" "C:\Users\ContainerAdministrator\.espressif\python_env\idf4.1_py3.7_env\Scripts" "C:\Program Files\Git\cmd\" && cd examples\get-started\blink\ && idf.py build'
+#cmd /c "ping -n 4 127.0.0.1 && .\export.bat && cd examples\get-started\blink\ && idf.py build"
+#cmd /c "ping -n 4 127.0.0.1 && .\export.bat && cd examples\get-started\blink\ && idf.py build"
+#cmd /c "timeout 4 && C:\Users\ContainerAdministrator\.espressif\idf_cmd_init.bat 'C:\' && cd examples\get-started\blink\ && idf.py build"
+
+#& "C:\Users\ContainerAdministrator\Desktop\esp-idf\Run ESP-IDF Command Prompt (cmd.exe).lnk"

tools/windows/tool_setup/build_installer.sh

@@ -10,6 +10,19 @@
 set -e
 set -u
 
+INSTALLER_TYPE="$1"
+if [[ -z "$INSTALLER_TYPE" ]]; then
+    INSTALLER_TYPE="full"
+fi
+
+echo "Selected installer type: $INSTALLER_TYPE"
+echo "Available installer types: full, netinst"
+
+PACKAGES="all"
+if [[ "$INSTALLER_TYPE" == "netinst" ]]; then
+    PACKAGES="idf-python"
+fi
+
 iscc_path=$(which iscc)
 if [[ -z "$iscc_path" ]]; then
     echo "Inno setup compiler (iscc) not found. Are you running wine-innosetup Docker image?"
@@ -24,7 +37,7 @@ fi
 echo "Downloading IDF Tools..."
 mkdir -p idf_tools_tmp
 export IDF_TOOLS_PATH=$PWD/idf_tools_tmp
-$IDF_PATH/tools/idf_tools.py --non-interactive download --platform Windows-x86_64 all
+$IDF_PATH/tools/idf_tools.py --non-interactive download --platform Windows-x86_64 $PACKAGES
 $IDF_PATH/tools/idf_tools.py --tools-json tools_fallback.json --non-interactive download --platform Windows-x86_64 all
 mkdir -p dist
 cp idf_tools_tmp/dist/* dist/
@@ -40,4 +53,5 @@ echo "Downloading idf_versions.txt..."
 wget --no-verbose -O idf_versions.txt https://dl.espressif.com/dl/esp-idf/idf_versions.txt
 
 echo "Running ISCC..."
-iscc idf_tool_setup.iss
+# https://jrsoftware.org/ishelp/index.php?topic=compilercmdline
+iscc /F "esp-idf-tools-setup-$INSTALLER_TYPE-unsigned" idf_tool_setup.iss

tools/windows/tool_setup/choice_page.iss.inc

@@ -1,4 +1,4 @@
-{ Copyright 2019-2020 Espressif Systems (Shanghai) CO LTD
+{ Copyright 2019-2021 Espressif Systems (Shanghai) CO LTD
   SPDX-License-Identifier: Apache-2.0 }
 
 var

tools/windows/tool_setup/cmdline_page.iss.inc

@@ -1,4 +1,4 @@
-{ Copyright 2019-2020 Espressif Systems (Shanghai) CO LTD
+{ Copyright 2019-2021 Espressif Systems (Shanghai) CO LTD
   SPDX-License-Identifier: Apache-2.0 }
 
 { ------------------------------ Progress & log page for command line tools ------------------------------ }

tools/windows/tool_setup/docker-compose.yml

@@ -0,0 +1,24 @@
+version: "3"
+
+# This docker-compose is for testing the installation process.
+# In starts the installation and executes also build of get-started example.
+services:
+  idf-setup-test:
+    image: mcr.microsoft.com/windows/servercore:1809
+    command: powershell -c "C:/Scripts/Prepare-Cache.ps1 -IdfVersion ${IDF_VERSION}; C:/Scripts/Install-Idf.ps1 -Installer 'c:/Output/esp-idf-tools-setup-unsigned.exe' -IdfVersion ${IDF_VERSION}; C:/Scripts/Test-Idf.ps1; powershell ;exit $$LASTEXITCODE"
+    tmpfs:
+      - C:\Users\ContainerAdministrator\.espressif
+    volumes:
+      - type: bind
+        source: C:\projects\esp-idf\tools\windows\tool_setup\Output
+        target: C:\Output
+        read_only: true
+      - type: bind
+        source: C:\projects\esp-idf\tools\windows\tool_setup\Scripts
+        target: C:\Scripts
+        read_only: true
+      # releases volume to speed up installation and avoid downloading of files
+      - type: bind
+        source: C:\projects\esp-tests\installer-docker-runner\.espressif\
+        target: C:\Cache
+        read_only: true

tools/windows/tool_setup/git_find_installed.iss.inc

@@ -1,4 +1,4 @@
-{ Copyright 2019-2020 Espressif Systems (Shanghai) CO LTD
+{ Copyright 2019-2021 Espressif Systems (Shanghai) CO LTD
   SPDX-License-Identifier: Apache-2.0 }
 
 { ------------------------------ Find installed copies of Git ------------------------------ }

tools/windows/tool_setup/git_page.iss.inc

@@ -1,4 +1,4 @@
-{ Copyright 2019-2020 Espressif Systems (Shanghai) CO LTD
+{ Copyright 2019-2021 Espressif Systems (Shanghai) CO LTD
   SPDX-License-Identifier: Apache-2.0 }
 
 { ------------------------------ Page to select Git ------------------------------ }

tools/windows/tool_setup/idf_download_page.iss.inc

@@ -1,4 +1,4 @@
-{ Copyright 2019-2020 Espressif Systems (Shanghai) CO LTD
+{ Copyright 2019-2021 Espressif Systems (Shanghai) CO LTD
   SPDX-License-Identifier: Apache-2.0 }
 
 { ------------------------------ Page to select the version of ESP-IDF to download ------------------------------ }
@@ -46,7 +46,7 @@ var
   Url: String;
   VersionFile: String;
 begin
-  Url := '{#IDFVersionsURL}';
+  Url := ExpandConstant('{param:IDFVERSIONSURL|https://dl.espressif.com/dl/esp-idf/idf_versions.txt}')
   VersionFile := ExpandConstant('{tmp}\idf_versions.txt');
   if idpDownloadFile(Url, VersionFile) then
   begin
@@ -62,6 +62,7 @@ var
   Page: TInputOptionWizardPage;
   VersionFile: String;
   i: Integer;
+  SuggestedIDFDirectory: String;
 begin
   Page := TInputOptionWizardPage(Sender);
   Log('OnIDFDownloadPagePrepare');
@@ -86,7 +87,26 @@ begin
   end;
   Page.SelectedValueIndex := 0;
 
-  ChoicePageSetInputText(Page, GetSuggestedIDFDirectory());
+  SuggestedIDFDirectory := ExpandConstant('{param:IDFDIR|' + GetSuggestedIDFDirectory() + '}');
+  ChoicePageSetInputText(Page, SuggestedIDFDirectory);
+end;
+
+{ Validation of PATH for IDF releases which does not support special characters. }
+{ Source: https://stackoverflow.com/questions/21623515/is-it-possible-to-filter-require-installation-path-to-be-ascii-in-innosetup }
+function IsCharValid(Value: Char): Boolean;
+begin
+  Result := Ord(Value) <= $007F;
+end;
+
+function IsDirNameValid(const Value: string): Boolean;
+var
+  I: Integer;
+begin
+  Result := False;
+  for I := 1 to Length(Value) do
+    if not IsCharValid(Value[I]) then
+      Exit;
+  Result := True;
 end;
 
 procedure OnIDFDownloadSelectionChange(Sender: TObject);
@@ -122,7 +142,24 @@ begin
   end;
 
   IDFDownloadPath := IDFPath;
-  IDFDownloadVersion := IDFDownloadAvailableVersions[Page.SelectedValueIndex];
+
+  { Use parameter /IDFVE=x to override selection in the box. }
+  IDFDownloadVersion := ExpandConstant('{param:IDFVERSION|}');
+  if (IDFDownloadVersion = '') then begin
+    IDFDownloadVersion := IDFDownloadAvailableVersions[Page.SelectedValueIndex];
+  end;
+
+  { Following ZIP versions of IDF does not support installation on path with special characters. }
+  { Issue: https://github.com/espressif/esp-idf/issues/5996 }
+  if ((IDFDownloadVersion = 'v4.1') or (IDFDownloadVersion = 'v4.0.2') or
+    (IDFDownloadVersion = 'v3.3.4')) then begin
+    if (not IsDirNameValid(IDFPath)) then begin
+      MsgBox('The installation of selected version of IDF is not supported on path with special characters.' + #13#10
+            'Please choose a different directory.', mbError, MB_OK);
+      exit;
+    end;
+  end;
+
   Result := True;
 end;
 

tools/windows/tool_setup/idf_page.iss.inc

@@ -1,4 +1,4 @@
-{ Copyright 2019-2020 Espressif Systems (Shanghai) CO LTD
+{ Copyright 2019-2021 Espressif Systems (Shanghai) CO LTD
   SPDX-License-Identifier: Apache-2.0 }
 
 { ------------------------------ Page to select whether to download ESP-IDF, or use an existing copy ------------------------------ }

tools/windows/tool_setup/idf_setup.iss.inc

@@ -1,4 +1,4 @@
-{ Copyright 2019-2020 Espressif Systems (Shanghai) CO LTD
+{ Copyright 2019-2021 Espressif Systems (Shanghai) CO LTD
   SPDX-License-Identifier: Apache-2.0 }
 
 { ------------------------------ Downloading ESP-IDF ------------------------------ }
@@ -140,7 +140,9 @@ var
   IDFTempPath: String;
   IDFPath: String;
   NeedToClone: Boolean;
-
+  GitRepoParam: String;
+  GitResetParam: String;
+  GitRecursiveParam: String;
 begin
   IDFPath := IDFDownloadPath;
   { If there is a release archive to download, IDFZIPFileName and IDFZIPFileVersion will be set.
@@ -158,7 +160,6 @@ begin
       NeedToClone := True;
     end;
 
-    ExtractTemporaryFile('7za.exe')
     CmdLine := ExpandConstant('{tmp}\7za.exe x -o' + ExpandConstant('{tmp}') + ' -r -aoa "' + IDFZIPFileName + '"');
     IDFTempPath := ExpandConstant('{tmp}\esp-idf-') + IDFZIPFileVersion;
     Log('Extracting ESP-IDF reference repository: ' + CmdLine);
@@ -172,12 +173,19 @@ begin
 
   if NeedToClone then
   begin
-    CmdLine := GitExecutablePath + ' clone --recursive --progress -b ' + IDFDownloadVersion;
+    CmdLine := GitExecutablePath + ' clone --progress -b ' + IDFDownloadVersion;
+
+    GitRecursiveParam := ExpandConstant('{param:GITRECURSIVE|yes}');
+    if (GitRecursiveParam = 'yes') then begin
+      CmdLine := CmdLine + ' --recursive ';
+    end;
 
     if IDFTempPath <> '' then
       CmdLine := CmdLine + ' --reference ' + IDFTempPath;
 
-    CmdLine := CmdLine + ' https://github.com/espressif/esp-idf.git ' + IDFPath;
+    GitRepoParam := ExpandConstant('{param:GITREPO|https://github.com/espressif/esp-idf.git}');
+
+    CmdLine := CmdLine + ' ' + GitRepoParam +' ' + IDFPath;
     Log('Cloning IDF: ' + CmdLine);
     DoCmdlineInstall('Downloading ESP-IDF', 'Using git to clone ESP-IDF repository', CmdLine);
 
@@ -202,7 +210,14 @@ begin
     CmdLine := ExpandConstant('cmd.exe /c ""xcopy" /s /e /i /h /q "' + IDFTempPath + '" "' + IDFPath + '""');
     DoCmdlineInstall('Extracting ESP-IDF', 'Copying ESP-IDF into the destination directory', CmdLine);
     GitRepoFixFileMode(IDFPath);
-    GitRepoFixNewlines(IDFPath);
+
+    GitResetParam := ExpandConstant('{param:GITRESET|yes}');
+    if (GitResetParam = 'yes') then begin
+      GitRepoFixNewlines(IDFPath);
+    end else begin
+      Log('Git reset disabled by command line option /GITRESET=yes.');
+    end;
+
     DelTree(IDFTempPath, True, True, True);
   end;
 end;
@@ -222,51 +237,6 @@ begin
   end;
 end;
 
-procedure IDFToolsSetup();
-var
-  CmdLine: String;
-  IDFPath: String;
-  IDFToolsPyPath: String;
-  IDFToolsPyCmd: String;
-  BundledIDFToolsPyPath: String;
-  JSONArg: String;
-begin
-  IDFPath := GetIDFPath('');
-  IDFToolsPyPath := IDFPath + '\tools\idf_tools.py';
-  BundledIDFToolsPyPath := ExpandConstant('{app}\idf_tools_fallback.py');
-  JSONArg := '';
-
-  if FileExists(IDFToolsPyPath) then
-  begin
-    Log('idf_tools.py exists in IDF directory');
-    if UseBundledIDFToolsPy(IDFDownloadVersion) then
-    begin
-      Log('Using the bundled idf_tools.py copy');
-      IDFToolsPyCmd := BundledIDFToolsPyPath;
-    end else begin
-      IDFToolsPyCmd := IDFToolsPyPath;
-    end;
-  end else begin
-    Log('idf_tools.py does not exist in IDF directory, using a fallback version');
-    IDFToolsPyCmd := BundledIDFToolsPyPath;
-    JSONArg := ExpandConstant('--tools "{app}\tools_fallback.json"');
-  end;
-
-  { IDFPath not quoted, as it can not contain spaces }
-  IDFToolsPyCmd := PythonExecutablePath + ' "' + IDFToolsPyCmd + '" --idf-path ' + IDFPath + JSONArg;
-
-  SetEnvironmentVariable('PYTHONUNBUFFERED', '1')
-
-  Log('idf_tools.py command: ' + IDFToolsPyCmd);
-  CmdLine := IDFToolsPyCmd + ' install';
-  Log('Installing tools:' + CmdLine);
-  DoCmdlineInstall('Installing ESP-IDF tools', '', CmdLine);
-
-  CmdLine := IDFToolsPyCmd + ' install-python-env';
-  Log('Installing Python environment:' + CmdLine);
-  DoCmdlineInstall('Installing Python environment', '', CmdLine);
-end;
-
 { Find Major and Minor version in esp_idf_version.h file. }
 function GetIDFVersionFromHeaderFile():String;
 var
@@ -300,17 +270,119 @@ begin
   end;
 end;
 
+{ Get short version from long version e.g. 3.7.9 -> 3.7 }
+function GetShortVersion(VersionString:String):String;
+var
+  VersionIndex: Integer;
+  MajorString: String;
+  MinorString: String;
+  DotIndex: Integer;
+begin
+  { Transform version vx.y or release/vx.y to x.y }
+  VersionIndex := pos('v', VersionString);
+  if (VersionIndex > 0) then begin
+    Delete(VersionString, 1, VersionIndex);
+  end;
+
+  { Transform version x.y.z to x.y }
+  DotIndex := pos('.', VersionString);
+  if (DotIndex > 0) then begin
+    MajorString := Copy(VersionString, 1, DotIndex - 1);
+    Delete(VersionString, 1, DotIndex);
+    { Trim trailing version numbers. }
+    DotIndex := pos('.', VersionString);
+    if (DotIndex > 0) then begin
+      MinorString := Copy(VersionString, 1, DotIndex - 1);
+      VersionString := MajorString + '.' + MinorString;
+    end else begin
+     VersionString :=  MajorString + '.' + VersionString;
+    end;
+  end;
+
+  Result := VersionString;
+end;
+
+{ Get IDF version string in combination with Python version. }
+{ Result e.g.: idf4.1_py38 }
+function GetIDFPythonEnvironmentVersion():String;
+var
+  IDFVersionString: String;
+begin
+  { Transform main or master to x.y }
+  if (Pos('main', IDFDownloadVersion) > 0) or (Pos('master', IDFDownloadVersion) > 0) then begin
+    IDFVersionString := GetIDFVersionFromHeaderFile();
+  end else begin
+    IDFVersionString := GetShortVersion(IDFDownloadVersion);
+  end;
+
+  Result := 'idf' + IDFVersionString + '_py' + GetShortVersion(PythonVersion);
+end;
+
+procedure IDFToolsSetup();
+var
+  CmdLine: String;
+  IDFPath: String;
+  IDFToolsPyPath: String;
+  IDFToolsPyCmd: String;
+  BundledIDFToolsPyPath: String;
+  JSONArg: String;
+  OfflineParameter: String;
+  PythonWheelsUrlParameter: String;
+begin
+  IDFPath := GetIDFPath('');
+  IDFToolsPyPath := IDFPath + '\tools\idf_tools.py';
+  BundledIDFToolsPyPath := ExpandConstant('{app}\idf_tools_fallback.py');
+  JSONArg := '';
+
+  if FileExists(IDFToolsPyPath) then
+  begin
+    Log('idf_tools.py exists in IDF directory');
+    if UseBundledIDFToolsPy(IDFDownloadVersion) then
+    begin
+      Log('Using the bundled idf_tools.py copy');
+      IDFToolsPyCmd := BundledIDFToolsPyPath;
+    end else begin
+      IDFToolsPyCmd := IDFToolsPyPath;
+    end;
+  end else begin
+    Log('idf_tools.py does not exist in IDF directory, using a fallback version');
+    IDFToolsPyCmd := BundledIDFToolsPyPath;
+    JSONArg := ExpandConstant('--tools "{app}\tools_fallback.json"');
+  end;
+
+  { IDFPath not quoted, as it can not contain spaces }
+  IDFToolsPyCmd := PythonExecutablePath + ' "' + IDFToolsPyCmd + '" --idf-path ' + IDFPath + JSONArg;
+
+  SetEnvironmentVariable('PYTHONUNBUFFERED', '1');
+
+  OfflineParameter := ExpandConstant('{param:OFFLINE|no}');
+  if (OfflineParameter = 'yes') then begin
+    SetEnvironmentVariable('PIP_NO_INDEX', 'true');
+    Log('Offline installation selected. Setting environment variable PIP_NO_INDEX=1');
+  end else begin
+    PythonWheelsUrlParameter := ExpandConstant('{param:PYTHONWHEELSURL|https://dl.espressif.com/pypi}');
+    SetEnvironmentVariable('PIP_EXTRA_INDEX_URL', PythonWheelsUrlParameter);
+    Log('Adding extra Python wheels location. Setting environment variable PIP_EXTRA_INDEX_URL=' + PythonWheelsUrlParameter);
+  end;
+
+  Log('idf_tools.py command: ' + IDFToolsPyCmd);
+  CmdLine := IDFToolsPyCmd + ' install';
+  Log('Installing tools:' + CmdLine);
+  DoCmdlineInstall('Installing ESP-IDF tools', '', CmdLine);
+
+  CmdLine := IDFToolsPyCmd + ' install-python-env';
+
+  Log('Installing Python environment:' + CmdLine);
+  DoCmdlineInstall('Installing Python environment', '', CmdLine);
+end;
+
+
 { ------------------------------ Start menu shortcut ------------------------------ }
 
 procedure CreateIDFCommandPromptShortcut(LnkString: String);
 var
   Destination: String;
   Description: String;
-  VersionIndex: Integer;
-  MajorString: String;
-  MinorString: String;
-  DotIndex: Integer;
-  IDFVersionString: String;
   PythonVirtualEnvPath: String;
   Command: String;
 begin
@@ -318,39 +390,14 @@ begin
   Destination := ExpandConstant(LnkString + '\{#IDFCmdExeShortcutFile}');
   Description := '{#IDFCmdExeShortcutDescription}';
 
-  IDFVersionString := IDFDownloadVersion;
-  { Transform version vx.y or release/vx.y to x.y }
-  VersionIndex := pos('v', IDFVersionString);
-  if (VersionIndex > 0) then begin
-    Delete(IDFVersionString, 1, VersionIndex);
-  end;
-
-  { Transform version x.y.z to x.y }
-  DotIndex := pos('.', IDFVersionString);
-  if (DotIndex > 0) then begin
-    MajorString := Copy(IDFVersionString, 1, DotIndex - 1);
-    Delete(IDFVersionString, 1, DotIndex);
-    { Trim trailing version numbers. }
-    DotIndex := pos('.', IDFVersionString);
-    if (DotIndex > 0) then begin
-      MinorString := Copy(IDFVersionString, 1, DotIndex - 1);
-      IDFVersionString := MajorString + '.' + MinorString;
-    end else begin
-     IDFVersionString :=  MajorString + '.' + IDFVersionString;
-    end;
-  end;
-
-  { Transform master to x.y }
-  if (IDFVersionString = 'master') then begin
-    IDFVersionString := GetIDFVersionFromHeaderFile();
-  end;
-
   { The links should contain reference to Python vitual env }
-  PythonVirtualEnvPath := ExpandConstant('{app}\python_env\idf') + IDFVersionString + '_py' + PythonVersion + '_env\Scripts';
+  PythonVirtualEnvPath := ExpandConstant('{app}\python_env\') + GetIDFPythonEnvironmentVersion() + '_env\Scripts';
+  Log('Path to Python in virtual env: ' + PythonVirtualEnvPath);
 
   { Fallback in case of not existing environment. }
   if (not FileExists(PythonVirtualEnvPath + '\python.exe')) then begin
     PythonVirtualEnvPath := PythonPath;
+    Log('python.exe not found, reverting to:' + PythonPath);
   end;
 
   { If cmd.exe command argument starts with a quote, the first and last quote chars in the command

tools/windows/tool_setup/idf_tool_setup.iss

@@ -1,24 +1,22 @@
-; Copyright 2019-2020 Espressif Systems (Shanghai) CO LTD
+; Copyright 2019-2021 Espressif Systems (Shanghai) CO LTD
 ; SPDX-License-Identifier: Apache-2.0
 
 #pragma include __INCLUDE__ + ";" + ReadReg(HKLM, "Software\Mitrich Software\Inno Download Plugin", "InstallDir")
 #include <idp.iss>
 
 #define MyAppName "ESP-IDF Tools"
-#define MyAppVersion "2.3"
+#define MyAppVersion "2.4"
 #define MyAppPublisher "Espressif Systems (Shanghai) Co. Ltd."
 #define MyAppURL "https://github.com/espressif/esp-idf"
 
-#define PythonVersion "3.7"
+#define PythonVersion "3.9.1"
-#define PythonInstallerName "python-3.7.3-amd64.exe"
+#define PythonInstallerName "idf-python-3.9.1-embed-win64.zip"
-#define PythonInstallerDownloadURL "https://www.python.org/ftp/python/3.7.3/python-3.7.3-amd64.exe"
+#define PythonInstallerDownloadURL "https://dl.espressif.com/dl/idf-python/idf-python-3.9.1-embed-win64.zip"
 
 #define GitVersion "2.21.0"
 #define GitInstallerName "Git-2.21.0-64-bit.exe"
 #define GitInstallerDownloadURL "https://github.com/git-for-windows/git/releases/download/v2.21.0.windows.1/Git-2.21.0-64-bit.exe"
 
-#define IDFVersionsURL "https://dl.espressif.com/dl/esp-idf/idf_versions.txt"
-
 #define IDFCmdExeShortcutDescription "Open ESP-IDF Command Prompt (cmd.exe)"
 #define IDFCmdExeShortcutFile "ESP-IDF Command Prompt (cmd.exe).lnk"
 
@@ -90,7 +88,6 @@ Name: wdexcl; Description: "Register the ESP-IDF Tools executables as Windows De
 Name: idf_tools_use_mirror; Description: "Use Espressif download server instead of downloading tool packages from Github"; Flags: unchecked;
 
 [Run]
-Filename: "{app}\dist\{#PythonInstallerName}"; Parameters: "/passive PrependPath=1 InstallLauncherAllUsers=0 Include_dev=0 Include_tcltk=0 Include_launcher=0 Include_test=0 Include_doc=0"; Description: "Installing Python"; Check: PythonInstallRequired
 Filename: "{app}\dist\{#GitInstallerName}"; Parameters: "/silent /tasks="""" /norestart"; Description: "Installing Git"; Check: GitInstallRequired
 Filename: "{group}\{#IDFCmdExeShortcutFile}"; Flags: postinstall shellexec; Description: "Run ESP-IDF Command Prompt (cmd.exe)"; Check: InstallationSuccessful
 

tools/windows/tool_setup/main.iss.inc

@@ -1,4 +1,4 @@
-{ Copyright 2019-2020 Espressif Systems (Shanghai) CO LTD
+{ Copyright 2019-2021 Espressif Systems (Shanghai) CO LTD
   SPDX-License-Identifier: Apache-2.0 }
 
 { ------------------------------ Custom steps before the main installation flow ------------------------------ }
@@ -45,17 +45,6 @@ begin
 
   ForceDirectories(ExpandConstant('{app}\dist'));
 
-  if not PythonUseExisting then
-  begin
-    DestPath := ExpandConstant('{app}\dist\{#PythonInstallerName}');
-    if FileExists(DestPath) then
-    begin
-      Log('Python installer already downloaded: ' + DestPath);
-    end else begin
-      idpAddFile('{#PythonInstallerDownloadURL}', DestPath);
-    end;
-  end;
-
   if not GitUseExisting then
   begin
     DestPath := ExpandConstant('{app}\dist\{#GitInstallerName}');
@@ -82,9 +71,6 @@ var
 begin
   EnvPath := GetEnv('PATH');
 
-  if not PythonUseExisting then
-    PythonExecutablePathUpdateAfterInstall();
-
   if not GitUseExisting then
     GitExecutablePathUpdateAfterInstall();
 
@@ -103,6 +89,26 @@ begin
   SetEnvironmentVariable('PYTHONPATH', '')
 end;
 
+procedure InstallEmbeddedPython();
+var
+  EmbeddedPythonPath: String;
+  CmdLine: String;
+begin
+  if (Pos('tools', PythonPath) <> 1) then begin
+    Exit;
+  end;
+
+  EmbeddedPythonPath := ExpandConstant('{app}\') + PythonExecutablePath;
+  UpdatePythonVariables(EmbeddedPythonPath);
+  Log('Checking existence of Embedded Python: ' + EmbeddedPythonPath);
+  if (FileExists(EmbeddedPythonPath)) then begin
+    Exit;
+  end;
+
+  CmdLine := ExpandConstant('{tmp}\7za.exe x -o{app}\tools\python\' + PythonVersion + '\ -r -aoa "{app}\dist\idf-python-' + PythonVersion + '-embed-win64.zip"');
+  DoCmdlineInstall('Extracting Python Interpreter', 'Using Embedded Python', CmdLine);
+end;
+
 <event('CurStepChanged')>
 procedure PostInstallSteps(CurStep: TSetupStep);
 var
@@ -111,6 +117,9 @@ begin
   if CurStep <> ssPostInstall then
     exit;
 
+  ExtractTemporaryFile('7za.exe')
+  InstallEmbeddedPython();
+
   try
     AddPythonGitToPath();
 

tools/windows/tool_setup/python_find_installed.iss.inc

@@ -1,4 +1,4 @@
-{ Copyright 2019-2020 Espressif Systems (Shanghai) CO LTD
+{ Copyright 2019-2021 Espressif Systems (Shanghai) CO LTD
   SPDX-License-Identifier: Apache-2.0 }
 
 { ------------------------------ Find installed Python interpreters in Windows Registry (see PEP 514) ------------------------------ }

tools/windows/tool_setup/python_page.iss.inc

@@ -1,4 +1,4 @@
-{ Copyright 2019-2020 Espressif Systems (Shanghai) CO LTD
+{ Copyright 2019-2021 Espressif Systems (Shanghai) CO LTD
   SPDX-License-Identifier: Apache-2.0 }
 
 { ------------------------------ Page to select Python interpreter ------------------------------ }
@@ -8,7 +8,6 @@
 var
   PythonPage: TInputOptionWizardPage;
   PythonVersion, PythonPath, PythonExecutablePath: String;
-  PythonUseExisting: Boolean;
 
 
 function GetPythonPath(Unused: String): String;
@@ -16,11 +15,6 @@ begin
   Result := PythonPath;
 end;
 
-function PythonInstallRequired(): Boolean;
-begin
-  Result := not PythonUseExisting;
-end;
-
 function PythonVersionSupported(Version: String): Boolean;
 var
   Major, Minor: Integer;
@@ -93,40 +87,26 @@ begin
   Log('OnPythonSelectionChange index=' + IntToStr(Page.SelectedValueIndex));
 end;
 
+procedure ApplyPythonConfigurationByIndex(Index:Integer);
+begin
+  Log('ApplyPythonConfigurationByIndex index=' + IntToStr(Index));
+  PythonExecutablePath := InstalledPythonExecutables[Index];
+  PythonPath := ExtractFilePath(PythonExecutablePath);
+  PythonVersion := InstalledPythonVersions[Index];
+  Log('ApplyPythonConfigurationByIndex: PythonPath='+PythonPath+' PythonExecutablePath='+PythonExecutablePath);
+end;
+
 function OnPythonPageValidate(Sender: TWizardPage): Boolean;
 var
   Page: TInputOptionWizardPage;
 begin
   Page := TInputOptionWizardPage(Sender);
-  Log('OnPythonPageValidate index=' + IntToStr(Page.SelectedValueIndex));
+  ApplyPythonConfigurationByIndex(Page.SelectedValueIndex);
-  if Page.SelectedValueIndex < InstalledPythonExecutables.Count then
-  begin
-    PythonUseExisting := True;
-    PythonExecutablePath := InstalledPythonExecutables[Page.SelectedValueIndex];
-    PythonPath := ExtractFilePath(PythonExecutablePath);
-    PythonVersion := InstalledPythonVersions[Page.SelectedValueIndex];
-  end else begin
-    PythonUseExisting := False;
-    PythonExecutablePath := '';
-    PythonPath := '';
-    PythonVersion := '{#PythonVersion}';
-  end;
-  Log('OnPythonPageValidate: PythonPath='+PythonPath+' PythonExecutablePath='+PythonExecutablePath);
   Result := True;
 end;
 
-procedure PythonExecutablePathUpdateAfterInstall();
+procedure UpdatePythonVariables(ExecutablePath: String);
-var
-  Version, DisplayName, ExecutablePath, BaseDir: String;
 begin
-  if not GetPythonVersionInfoFromKey(
-      HKEY_CURRENT_USER, 'Software\Python', 'PythonCore', '{#PythonVersion}',
-      Version, DisplayName, ExecutablePath, BaseDir) then
-  begin
-    Log('Failed to find ExecutablePath for the installed copy of Python');
-    exit;
-  end;
-  Log('Found ExecutablePath for ' + DisplayName + ': ' + ExecutablePath);
   PythonExecutablePath := ExecutablePath;
   PythonPath := ExtractFilePath(PythonExecutablePath);
   Log('PythonExecutablePathUpdateAfterInstall: PythonPath='+PythonPath+' PythonExecutablePath='+PythonExecutablePath);
@@ -145,3 +125,18 @@ begin
     @OnPythonSelectionChange,
     @OnPythonPageValidate);
 end;
+
+<event('ShouldSkipPage')>
+function ShouldSkipPythonPage(PageID: Integer): Boolean;
+var
+  UseEmbeddedPythonParam: String;
+begin
+  if (PageID = PythonPage.ID) then begin
+    { Skip in case of embedded Python. }
+    UseEmbeddedPythonParam := ExpandConstant('{param:USEEMBEDDEDPYTHON|yes}');
+    if (UseEmbeddedPythonParam = 'yes') then begin
+      ApplyPythonConfigurationByIndex(0);
+      Result := True;
+    end;
+  end;
+end;

tools/windows/tool_setup/summary.iss.inc

@@ -1,4 +1,4 @@
-{ Copyright 2019-2020 Espressif Systems (Shanghai) CO LTD
+{ Copyright 2019-2021 Espressif Systems (Shanghai) CO LTD
   SPDX-License-Identifier: Apache-2.0 }
 
 { ------------------------------ Installation summary page ------------------------------ }
@@ -8,12 +8,12 @@ function UpdateReadyMemo(Space, NewLine, MemoUserInfoInfo, MemoDirInfo,
 begin
   Result := ''
 
-  if PythonUseExisting then
+  if (FileExists(PythonExecutablePath)) then
   begin
     Result := Result + 'Using Python ' + PythonVersion + ':' + NewLine
               + Space + PythonExecutablePath + NewLine + NewLine;
   end else begin
-    Result := Result + 'Will download and install Python ' + PythonVersion + NewLine + NewLine;
+    Result := Result + 'Using embedded Python ' + PythonVersion + NewLine + NewLine;
   end;
 
   if GitUseExisting then

tools/windows/tool_setup/system_check_page.iss.inc

@@ -1,4 +1,4 @@
-{ Copyright 2019-2020 Espressif Systems (Shanghai) CO LTD
+{ Copyright 2019-2021 Espressif Systems (Shanghai) CO LTD
   SPDX-License-Identifier: Apache-2.0 }
 
 { SystemCheck states }
@@ -474,6 +474,8 @@ end;
 
 { Execute system check }
 procedure ExecuteSystemCheck();
+var
+  UseEmbeddedPythonParam: String;
 begin
   { Execute system check only once. Avoid execution in case of back button. }
   if (SystemCheckState <> SYSTEM_CHECK_STATE_INIT) then begin
@@ -486,7 +488,11 @@ begin
 
   VerifyRootCertificates();
 
-  FindInstalledPythonVersions();
+  { Search for the installed Python version only on explicit user request. }
+  UseEmbeddedPythonParam := ExpandConstant('{param:USEEMBEDDEDPYTHON|yes}');
+  if (UseEmbeddedPythonParam <> 'yes') then begin
+    FindInstalledPythonVersions();
+  end;
 
   if (SystemCheckState <> SYSTEM_CHECK_STATE_STOPPED) then begin
     SystemLogTitle(CustomMessage('SystemCheckForDefender') + ' ');
@@ -519,6 +525,7 @@ end;
 
 { Invoke scan of system environment. }
 procedure OnSystemCheckActivate(Sender: TWizardPage);
+var SystemCheckParam:String;
 begin
   { Display special controls. For some reason the first call of the page does not invoke SystemCheckOnCurPageChanged. }
   FullLogButton.Visible := True;
@@ -526,6 +533,12 @@ begin
   StopSystemCheckButton.Visible := True;
   SystemCheckViewer.Visible := True;
 
+  SystemCheckParam := ExpandConstant('{param:SKIPSYSTEMCHECK|no}');
+  if (SystemCheckParam = 'yes') then begin
+    SystemCheckState := SYSTEM_CHECK_STATE_STOPPED;
+    SystemLog('System Check disabled by command line option /SKIPSYSTEMCHECK.');
+  end;
+
   ExecuteSystemCheck();
 end;
 
@@ -585,6 +598,7 @@ begin
   InstalledPythonVersions := TStringList.Create();
   InstalledPythonDisplayNames := TStringList.Create();
   InstalledPythonExecutables := TStringList.Create();
+  PythonVersionAdd('{#PythonVersion}', 'Use Python {#PythonVersion} Embedded (Recommended)', 'tools\python\{#PythonVersion}\python.exe');
 
   { Create Spinner animation. }
   Spinner := TStringList.Create();