Release 2.56.21

CHANGELOG.md

@@ -10,6 +10,10 @@ Note: In this file, do not use the hard wrap in the middle of a sentence for com
 
 ## [Unreleased]
 
+## [2.56.21] - 2025-07-22
+
+- Improve error message for unsupported host architectures.
+
 ## [2.56.20] - 2025-07-22
 
 - Update `syft@latest` to 1.29.0.
@@ -4178,7 +4182,8 @@ Note: This release is considered a breaking change because installing on version
 
 Initial release
 
-[Unreleased]: https://github.com/taiki-e/install-action/compare/v2.56.20...HEAD
+[Unreleased]: https://github.com/taiki-e/install-action/compare/v2.56.21...HEAD
+[2.56.21]: https://github.com/taiki-e/install-action/compare/v2.56.20...v2.56.21
 [2.56.20]: https://github.com/taiki-e/install-action/compare/v2.56.19...v2.56.20
 [2.56.19]: https://github.com/taiki-e/install-action/compare/v2.56.18...v2.56.19
 [2.56.18]: https://github.com/taiki-e/install-action/compare/v2.56.17...v2.56.18

main.sh

@@ -533,6 +533,11 @@ case "$(uname -m)" in
     # https://github.com/actions/runner/issues/688
     bail "32-bit Arm runner is not supported yet by this action; if you need support for this platform, please submit an issue at <https://github.com/taiki-e/install-action>"
     ;;
+  loongarch64 | mips | mips64 | ppc | ppc64 | ppc64le | riscv64 | s390x | sun4v)
+    # Very few tools provide prebuilt binaries for these.
+    # TODO: fallback to `cargo install`? (binstall fallback is not good idea here as cargo-binstall doesn't provide prebuilt binaries for these.)
+    bail "$(uname -m) runner is not supported yet by this action; if you need support for this platform, please submit an issue at <https://github.com/taiki-e/install-action>"
+    ;;
   # GitHub Actions Runner supports Linux (x86_64, AArch64, Arm), Windows (x86_64, AArch64),
   # and macOS (x86_64, AArch64).
   # https://github.com/actions/runner/blob/v2.321.0/.github/workflows/build.yml#L21