*_python*: clean up around commands suffixes. Drop Python3.9 support. (#12591)

Plus general recipe clean ups, while we're at it.

----

Tested locally only for mutagen. Will fix if something breaks.

`requests_python39` will pop up in in the reports due to missing `chardet_python39`.
Nothing requires `requests_python39` on tree, so will remove that at some point.

dev-python/chardet/chardet-4.0.0.recipe

@@ -3,7 +3,7 @@ DESCRIPTION="Python module for character encoding auto-detection."
 HOMEPAGE="https://github.com/chardet/chardet"
 COPYRIGHT="2011-2022 Mark Pilgrim, Dan Blanchard"
 LICENSE="GNU LGPL v2.1"
-REVISION="5"
+REVISION="6"
 SOURCE_URI="https://pypi.io/packages/source/${portName:0:1}/$portName/${portName}-$portVersion.tar.gz"
 CHECKSUM_SHA256="0d6f53a15db4120f2b08c94f11e7d93d2c911ee118b6b30a04ec3ee8310179fa"
 
@@ -20,34 +20,41 @@ BUILD_REQUIRES="
 	haiku_devel
 	"
 
-PYTHON_PACKAGES=(python39 python310)
-PYTHON_VERSIONS=(3.9 3.10)
-commandSuffixes=(3.8 "" 3.10)
-for i in "${!PYTHON_PACKAGES[@]}"; do
-pythonPackage=${PYTHON_PACKAGES[i]}
-pythonVersion=${PYTHON_VERSIONS[$i]}
-commandSuffix=${commandSuffixes[$i]}
-eval "PROVIDES_${pythonPackage}=\"\
-	${portName}_$pythonPackage = $portVersion\n\
-	cmd:chardetect$commandSuffix = $portVersion\n\
-	\"; \
-REQUIRES_$pythonPackage=\"\
-	haiku\n\
-	cmd:python$pythonVersion\
-	\""
-BUILD_REQUIRES="$BUILD_REQUIRES
-	setuptools_$pythonPackage"
-BUILD_PREREQUIRES="$BUILD_PREREQUIRES
-	cmd:python$pythonVersion"
+PYTHON_VERSIONS=(3.10)
+defaultVersion=3.10
+
+for pythonVersion in ${PYTHON_VERSIONS[@]}; do
+	pythonPackage=python${pythonVersion//.}
+
+	eval "PROVIDES_${pythonPackage}=\"
+		${portName}_$pythonPackage = $portVersion
+		cmd:chardetect_$pythonVersion = $portVersion
+		\""
+	# Provide non-suffixed cmd only for the default Python version
+	if [ $pythonVersion = $defaultVersion ]; then
+		eval "PROVIDES_$pythonPackage+=\"
+			cmd:chardetect = $portVersion
+			\""
+	fi
+
+	eval "REQUIRES_$pythonPackage=\"
+		haiku
+		cmd:python$pythonVersion
+		\""
+
+	BUILD_REQUIRES+="
+		setuptools_$pythonPackage
+		"
+	BUILD_PREREQUIRES+="
+		cmd:python$pythonVersion
+		"
 done
 
 
 INSTALL()
 {
-	for i in "${!PYTHON_PACKAGES[@]}"; do
-		pythonPackage=${PYTHON_PACKAGES[i]}
-		pythonVersion=${PYTHON_VERSIONS[$i]}
-		commandSuffix=${commandSuffixes[$i]}
+	for pythonVersion in ${PYTHON_VERSIONS[@]}; do
+		pythonPackage=python${pythonVersion//.}
 
 		python=python$pythonVersion
 		installLocation=$prefix/lib/$python/vendor-packages/
@@ -59,13 +66,19 @@ INSTALL()
 		$python setup.py build install \
 			--root=/ --prefix=$prefix
 
-		if [ "$pythonVersion" = "$commandSuffix" ]; then
+		# Version suffix all the scripts
+		for f in $binDir/*; do
+			mv $f $f-$pythonVersion
+		done
+
+		# And provide suffix-less symlinks for the default version
+		if [ $pythonVersion = $defaultVersion ]; then
 			for f in $binDir/*; do
-				mv $f ${f}$commandSuffix
+				ln -sr $f ${f%-$pythonVersion}
 			done
 		fi
 
-		packageEntries  $pythonPackage \
+		packageEntries $pythonPackage \
 			$prefix/lib/python* \
 			$binDir
 	done