feat!: drop support for platforms other than linux/amd64 and linux/arm64

I am unable to determine why [cryptography](https://cryptography.io/)
won't build on other platforms.

Closes #15.

Author: xenophonf

README.md

@@ -25,11 +25,9 @@ For the current "source of truth" for the `satosa` image, see
 ---
 
 [![build status badge](https://img.shields.io/github/workflow/status/IdentityPython/satosa-docker/GitHub%20CI/main?label=GitHub%20CI)](https://github.com/IdentityPython/satosa-docker/actions?query=workflow%3A%22GitHub+CI%22+branch%3Amain)
-
-| Build | Status | Badges | (per-arch) |
-|:-:|:-:|:-:|:-:|
-| [![amd64 build status badge](https://img.shields.io/jenkins/s/https/doi-janky.infosiftr.net/job/multiarch/job/amd64/job/satosa.svg?label=amd64)](https://doi-janky.infosiftr.net/job/multiarch/job/amd64/job/satosa/) | [![arm64v8 build status badge](https://img.shields.io/jenkins/s/https/doi-janky.infosiftr.net/job/multiarch/job/arm64v8/job/satosa.svg?label=arm64v8)](https://doi-janky.infosiftr.net/job/multiarch/job/arm64v8/job/satosa/) | [![ppc64le build status badge](https://img.shields.io/jenkins/s/https/doi-janky.infosiftr.net/job/multiarch/job/ppc64le/job/satosa.svg?label=ppc64le)](https://doi-janky.infosiftr.net/job/multiarch/job/ppc64le/job/satosa/) | [![riscv64 build status badge](https://img.shields.io/jenkins/s/https/doi-janky.infosiftr.net/job/multiarch/job/riscv64/job/satosa.svg?label=riscv64)](https://doi-janky.infosiftr.net/job/multiarch/job/riscv64/job/satosa/) |
-| [![s390x build status badge](https://img.shields.io/jenkins/s/https/doi-janky.infosiftr.net/job/multiarch/job/s390x/job/satosa.svg?label=s390x)](https://doi-janky.infosiftr.net/job/multiarch/job/s390x/job/satosa/) | [![put-shared build status badge](https://img.shields.io/jenkins/s/https/doi-janky.infosiftr.net/job/put-shared/job/light/job/satosa.svg?label=put-shared)](https://doi-janky.infosiftr.net/job/put-shared/job/light/job/satosa/) | | |
+[![amd64 build status badge](https://img.shields.io/jenkins/s/https/doi-janky.infosiftr.net/job/multiarch/job/amd64/job/satosa.svg?label=amd64)](https://doi-janky.infosiftr.net/job/multiarch/job/amd64/job/satosa/)
+[![arm64v8 build status badge](https://img.shields.io/jenkins/s/https/doi-janky.infosiftr.net/job/multiarch/job/arm64v8/job/satosa.svg?label=arm64v8)](https://doi-janky.infosiftr.net/job/multiarch/job/arm64v8/job/satosa/)
+[![put-shared build status badge](https://img.shields.io/jenkins/s/https/doi-janky.infosiftr.net/job/put-shared/job/light/job/satosa.svg?label=put-shared)](https://doi-janky.infosiftr.net/job/put-shared/job/light/job/satosa/)
 
 ---
 

generate-stackbrew-library.sh

@@ -130,36 +130,18 @@ for version; do
 		variantAliases=( "${variantAliases[@]//latest-/}" )
 
 		case "$v" in
-			windows/*)
-				variantArches='windows-amd64'
-				;;
-
 			*)
-				variantParent="$(awk 'toupper($1) == "FROM" { print $2 }' "$dir/Dockerfile")"
-				variantArches="${parentRepoToArches[$variantParent]}"
-				# https://github.com/IdentityPython/satosa-docker/issues/11
-				variantArches="$(sed <<<" $variantArches " -e 's/ *arm32.. */ /g')"
-				variantArches="$(sed <<<" $variantArches " -e 's/ i386 / /')"
-				;;
-		esac
-
-		case "$v" in
-			alpine*)
-				# https://github.com/IdentityPython/satosa-docker/issues/1
-				variantArches="$(sed <<<" $variantArches " -e 's/ s390x / /')"
+				# The cryptography library isn't well
+				# supported on other architectures, so
+				# give up on them for now;
+				# cf. IdentityPython/satosa-docker#15.
+				variantArches="amd64 arm64v8"
 				;;
 		esac
 
 		sharedTags=()
-		for windowsShared in windowsservercore nanoserver; do
-			if [[ "$variant" == "$windowsShared"* ]]; then
-				sharedTags=( "${versionAliases[@]/%/-$windowsShared}" )
-				sharedTags=( "${sharedTags[@]//latest-/}" )
-				break
-			fi
-		done
-
-		if [ "$variant" = "$defaultDebianVariant" ] || [[ "$variant" == 'windowsservercore'* ]]; then
+
+		if [ "$variant" = "$defaultDebianVariant" ]; then
 			sharedTags+=( "${versionAliases[@]}" )
 		fi