packaging: add -python2 to Windows installer filenames stable

packaging: add -python2 to Windows installer filenames

We just taught the Windows installers to produce Python 3 variants
built with PyOxidizer.

Our plan is to publish both Python 2 and Python 3 versions of the
installers for Mercurial 5.4.

This commit teaches the Inno and WiX installers to add an optional
string suffix to the installer name. On Python 2, that suffix is
"-python2." We reserve the existing name for the Python 3 installers,
which we want to make the default.

Differential Revision: https://phab.mercurial-scm.org/D8479

--- a/contrib/automation/hgautomation/windows.py	Thu Apr 23 17:24:37 2020 -0700
+++ b/contrib/automation/hgautomation/windows.py	Thu Apr 23 18:48:36 2020 -0700
@@ -108,10 +108,10 @@
 WHEEL_FILENAME_PYTHON38_X86 = 'mercurial-{version}-cp38-cp38-win32.whl'
 WHEEL_FILENAME_PYTHON38_X64 = 'mercurial-{version}-cp38-cp38-win_amd64.whl'
 
-X86_EXE_FILENAME = 'Mercurial-{version}.exe'
-X64_EXE_FILENAME = 'Mercurial-{version}-x64.exe'
-X86_MSI_FILENAME = 'mercurial-{version}-x86.msi'
-X64_MSI_FILENAME = 'mercurial-{version}-x64.msi'
+X86_EXE_FILENAME = 'Mercurial-{version}-x86-python2.exe'
+X64_EXE_FILENAME = 'Mercurial-{version}-x64-python2.exe'
+X86_MSI_FILENAME = 'mercurial-{version}-x86-python2.msi'
+X64_MSI_FILENAME = 'mercurial-{version}-x64-python2.msi'
 
 MERCURIAL_SCM_BASE_URL = 'https://mercurial-scm.org/release/windows'
 

--- a/contrib/packaging/hgpackaging/inno.py	Thu Apr 23 17:24:37 2020 -0700
+++ b/contrib/packaging/hgpackaging/inno.py	Thu Apr 23 18:48:36 2020 -0700
@@ -111,6 +111,7 @@
         iscc_exe,
         version,
         arch="x64" if vc_x64 else None,
+        suffix="-python2",
     )
 
 
@@ -150,6 +151,7 @@
     iscc_exe: pathlib.Path,
     version,
     arch=None,
+    suffix="",
 ):
     """Build an Inno installer from staged Mercurial files.
 
@@ -214,6 +216,9 @@
 
     if arch:
         args.append('/dARCH=%s' % arch)
+        args.append('/dSUFFIX=-%s%s' % (arch, suffix))
+    else:
+        args.append('/dSUFFIX=-x86%s' % suffix)
 
     if not version:
         version = read_version_py(source_dir)

--- a/contrib/packaging/hgpackaging/wix.py	Thu Apr 23 17:24:37 2020 -0700
+++ b/contrib/packaging/hgpackaging/wix.py	Thu Apr 23 18:48:36 2020 -0700
@@ -358,6 +358,7 @@
         version=version,
         python2=True,
         msi_name=msi_name,
+        suffix="-python2",
         extra_wxs=extra_wxs,
         extra_features=extra_features,
         signing_info=signing_info,
@@ -415,6 +416,7 @@
     version: str,
     python2: bool,
     msi_name: typing.Optional[str] = "mercurial",
+    suffix: str = "",
     extra_wxs: typing.Optional[typing.Dict[str, str]] = None,
     extra_features: typing.Optional[typing.List[str]] = None,
     signing_info: typing.Optional[typing.Dict[str, str]] = None,
@@ -489,7 +491,9 @@
     run_candle(wix_path, build_dir, source, source_build_rel, defines=defines)
 
     msi_path = (
-        source_dir / 'dist' / ('%s-%s-%s.msi' % (msi_name, orig_version, arch))
+        source_dir
+        / 'dist'
+        / ('%s-%s-%s%s.msi' % (msi_name, orig_version, arch, suffix))
     )
 
     args = [

--- a/contrib/packaging/inno/mercurial.iss	Thu Apr 23 17:24:37 2020 -0700
+++ b/contrib/packaging/inno/mercurial.iss	Thu Apr 23 18:48:36 2020 -0700
@@ -9,14 +9,13 @@
 AppCopyright=Copyright 2005-2020 Matt Mackall and others
 AppName=Mercurial
 AppVersion={#VERSION}
+OutputBaseFilename=Mercurial-{#VERSION}{#SUFFIX}
 #if ARCH == "x64"
 AppVerName=Mercurial {#VERSION} (64-bit)
-OutputBaseFilename=Mercurial-{#VERSION}-x64
 ArchitecturesAllowed=x64
 ArchitecturesInstallIn64BitMode=x64
 #else
 AppVerName=Mercurial {#VERSION}
-OutputBaseFilename=Mercurial-{#VERSION}
 #endif
 InfoAfterFile=../postinstall.txt
 LicenseFile=Copying.txt