[python] Remove use of generic python shebang, update CI

Fixes #10465

Following discussion we don't allow a generic `/usr/bin/python`
shebang anymore. We thus move all the scripts [but one] to python3,
and add python3 to the Azure base environment.

Unfortunately we still depend on python2 for the update-compat.py
script, see #10491

We thus have to complement #10467 adding python2 back to Nix,
until #10491 is fixed.

6 files changed, 6 insertions, 5 deletions

diff --git a/azure-pipelines.yml b/azure-pipelines.yml
index c93920a884..54d6b4b7c8 100644
--- a/azure-pipelines.yml
+++ b/azure-pipelines.yml
@@ -19,7 +19,7 @@ jobs:
       powershell -Command "(New-Object Net.WebClient).DownloadFile('http://www.cygwin.com/setup-x86_64.exe', 'setup-x86_64.exe')"
       SET CYGROOT=C:\cygwin64
       SET CYGCACHE=%CYGROOT%\var\cache\setup
-      setup-x86_64.exe -qnNdO -R %CYGROOT% -l %CYGCACHE% -s %CYGMIRROR% -P rsync -P patch -P diffutils -P make -P unzip -P m4 -P findutils -P time -P wget -P curl -P git -P mingw64-x86_64-binutils,mingw64-x86_64-gcc-core,mingw64-x86_64-gcc-g++,mingw64-x86_64-pkg-config,mingw64-x86_64-windows_default_manifest -P mingw64-x86_64-headers,mingw64-x86_64-runtime,mingw64-x86_64-pthreads,mingw64-x86_64-zlib -P python
+      setup-x86_64.exe -qnNdO -R %CYGROOT% -l %CYGCACHE% -s %CYGMIRROR% -P rsync -P patch -P diffutils -P make -P unzip -P m4 -P findutils -P time -P wget -P curl -P git -P mingw64-x86_64-binutils,mingw64-x86_64-gcc-core,mingw64-x86_64-gcc-g++,mingw64-x86_64-pkg-config,mingw64-x86_64-windows_default_manifest -P mingw64-x86_64-headers,mingw64-x86_64-runtime,mingw64-x86_64-pthreads,mingw64-x86_64-zlib -P python2 -P python3
 
       SET TARGET_ARCH=x86_64-w64-mingw32
       SET CD_MFMT=%cd:\=/%
diff --git a/default.nix b/default.nix
index 10c5f6be47..2d101eed57 100644
--- a/default.nix
+++ b/default.nix
@@ -41,6 +41,7 @@ stdenv.mkDerivation rec {
 
   buildInputs = [
     hostname
+    python2 # update-compat.py
     python3 time # coq-makefile timing tools
     dune
   ]
diff --git a/dev/tools/update-compat.py b/dev/tools/update-compat.py
index 0338cd42c7..c7bb36b6d3 100755
--- a/dev/tools/update-compat.py
+++ b/dev/tools/update-compat.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python2
 from __future__ import with_statement
 import os, re, sys, subprocess
 
diff --git a/tools/make-both-single-timing-files.py b/tools/make-both-single-timing-files.py
index 32c52c7a17..fddf75f39f 100755
--- a/tools/make-both-single-timing-files.py
+++ b/tools/make-both-single-timing-files.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import sys
 from TimeFileMaker import *
 
diff --git a/tools/make-both-time-files.py b/tools/make-both-time-files.py
index f730a8d6bd..8937d63c2f 100755
--- a/tools/make-both-time-files.py
+++ b/tools/make-both-time-files.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import sys
 from TimeFileMaker import *
 
diff --git a/tools/make-one-time-file.py b/tools/make-one-time-file.py
index e66136df9d..ad0a04ab07 100755
--- a/tools/make-one-time-file.py
+++ b/tools/make-one-time-file.py
@@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 import sys
 from TimeFileMaker import *