Pynsist nsi template rewritten as Python

write_nsi_template.py

from nsist.nsigen import *

Document([
Comment('Definitions will be added above'),
Instruction('SetCompressor', 'lzma'),
Instruction('RequestExecutionLevel', 'admin'),
'',
Comment("Modern UI installer stuff"),
CompilerCommand("include", "MUI2.nsh"),
define("MUI_ABORTWARNING"),
define("MUI_ICON", "${NSISDIR}\Contrib\Graphics\Icons\modern-install.ico"),
Comment("UI pages"),
insertmacro("MUI_PAGE_WELCOME"),
insertmacro("MUI_PAGE_COMPONENTS"),
insertmacro("MUI_PAGE_DIRECTORY"),
insertmacro("MUI_PAGE_INSTFILES"),
insertmacro("MUI_PAGE_FINISH"),
insertmacro("MUI_LANGUAGE", "English"),
Comment("MUI end ------"),
'',
Instruction("Name", "${PRODUCT_NAME} ${PRODUCT_VERSION}"),
Instruction("OutFile", "${INSTALLER_NAME}"),
Instruction("InstallDir", "$PROGRAMFILES${BITNESS}\${PRODUCT_NAME}"),
Instruction("ShowInstDetails", "show"),
'',
Section("-SETTINGS", contents=[
    Instruction("SetOutPath", "$INSTDIR"),
    Instruction("SetOverwrite", "ifnewer"),
]),

Section("Python ${PY_VERSION}", index_var="sec_py", contents=[
    File("python-${PY_VERSION}${ARCH_TAG}.msi"),
    Instruction("DetailPrint", "Installing Python ${PY_MAJOR_VERSION}, ${BITNESS} bit"),
    Instruction("ExecWait", 'msiexec /i "$INSTDIR\python-${PY_VERSION}${ARCH_TAG}.msi" '+
             '/qb ALLUSERS=1 TARGETDIR="$COMMONFILES${BITNESS}\Python\${PY_MAJOR_VERSION}"'),
    Instruction("Delete", "$INSTDIR\python-${PY_VERSION}${ARCH_TAG}.msi"),
]),

Section("!${PRODUCT_NAME}", index_var="sec_app", contents=[
  Instruction("SectionIn", "RO"),
  Instruction("SetShellVarContext", "all"),
  File("${PRODUCT_ICON}"),
  Instruction("SetOutPath", "$INSTDIR\pkgs"),
  File("/r", "pkgs\*.*"),
  Instruction("SetOutPath", "$INSTDIR"),
  Comment("INSTALL_FILES"),
  Comment("INSTALL_DIRECTORIES"),
  Comment("INSTALL_SHORTCUTS"),
  Comment("Byte-compile Python files."),
  DetailPrint("Byte-compiling Python modules..."),
  Instruction("nsExec::ExecToLog", 'py -${PY_QUALIFIER} -m compileall -q "$INSTDIR\pkgs"'),
  Instruction("WriteUninstaller", "$INSTDIR\\uninstall.exe"),
  Comment(" Add ourselves to Add/remove programs"),
  Instruction("WriteRegStr", "HKLM", r"Software\Microsoft\Windows\CurrentVersion\Uninstall\${PRODUCT_NAME}",
                   "DisplayName", "${PRODUCT_NAME}"),
  Instruction("WriteRegStr", "HKLM", r"Software\Microsoft\Windows\CurrentVersion\Uninstall\${PRODUCT_NAME}",
                   "UninstallString", r'"$INSTDIR\uninstall.exe"'),
  Instruction("WriteRegStr", "HKLM", r"Software\Microsoft\Windows\CurrentVersion\Uninstall\${PRODUCT_NAME}",
                   "InstallLocation", "$INSTDIR"),
  Instruction("WriteRegStr", "HKLM", r"Software\Microsoft\Windows\CurrentVersion\Uninstall\${PRODUCT_NAME}",
                   "DisplayIcon", "$INSTDIR\${PRODUCT_ICON}"),
  Instruction("WriteRegDWORD", "HKLM", r"Software\Microsoft\Windows\CurrentVersion\Uninstall\${PRODUCT_NAME}",
                   "NoModify", "1"),
  Instruction("WriteRegDWORD", "HKLM", r"Software\Microsoft\Windows\CurrentVersion\Uninstall\${PRODUCT_NAME}",
                   "NoRepair", "1"),
]),

Section("Uninstall", contents=[
  Instruction("SetShellVarContext", "all"),
  Instruction("Delete", "$INSTDIR\\uninstall.exe"),
  Instruction("Delete", "$INSTDIR\${PRODUCT_ICON}"),
  Instruction("RMDir", "/r", "$INSTDIR\pkgs"),
  Comment("UNINSTALL_FILES"),
  Comment("UNINSTALL_DIRECTORIES"),
  Comment("UNINSTALL_SHORTCUTS"),
  Instruction("RMDir", "$INSTDIR"),
  Instruction("DeleteRegKey", "HKLM", r"Software\Microsoft\Windows\CurrentVersion\Uninstall\${PRODUCT_NAME}"),
]),

Comment(' Functions'),
'',
Function('.onMouseOverSection', [
    Comment('Find which section the mouse is over, and set the corresponding description.'),
    Instruction("FindWindow", "$R0", "#32770", "", "$HWNDPARENT"),
    Instruction("GetDlgItem", "$R0", "$R0", "1043"), #description item (must be added to the UI)
    '',
    Conditional("StrCmp", "$0", "${sec_py}", ifbody=[
      Instruction("SendMessage", "$R0", "${WM_SETTEXT}", "0", 
                  "STR:The Python interpreter. This is required for ${PRODUCT_NAME} to run.")
    ]),
    Comment(''),
    Comment('PYLAUNCHER_HELP'),
    Comment('------------------'),
    '',
    Conditional('StrCmp', "$0", "${sec_app}", ifbody=[
      Instruction("SendMessage", "$R0", "${WM_SETTEXT}", "0", "STR:${PRODUCT_NAME}")
    ]),
]),

]).write("sample.nsi")