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toolchains: Add JDK 27 support #385

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a20fa27
toolchains: Add JDK 27 support
sluongng Oct 1, 2026
c9e6c58
toolchains: Add JDK 27 mirror URLs
sluongng Oct 1, 2026
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10 changes: 10 additions & 0 deletions MODULE.bazel
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Original file line number Diff line number Diff line change
Expand Up @@ -101,6 +101,16 @@ JDKS = {
"win",
"win_arm64",
],
"27": [
"linux",
"linux_aarch64",
"linux_ppc64le",
"linux_riscv64",
"linux_s390x",
"macos",
"macos_aarch64",
"win",
],
}

REMOTE_JDK_REPOS = [(("remote_jdk" if version == "8" else "remotejdk") + version + "_" + platform) for version in JDKS for platform in JDKS[version]]
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17 changes: 17 additions & 0 deletions java/bazel/repositories_util.bzl
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Expand Up @@ -102,6 +102,22 @@ _RELEASE_CONFIGS = {
},
},
},
"27": {
"zulu": {
"release": "27.28.101-ca-jdk27.0.0",
"platforms": {
"linux": ["aarch64", "x86_64"],
"macos": ["aarch64", "x86_64"],
"windows": ["x86_64"],
},
},
"adoptium": {
"release": "27+35",
"platforms": {
"linux": ["ppc64le", "riscv64", "s390x"],
},
},
},
}

_STRIP_PREFIX_OVERRIDES = {
Expand Down Expand Up @@ -197,6 +213,7 @@ def _flatten_configs():
urls, strip_prefix = _adoptopenjdk_remote_jdk_repo(version, os, cpu, release)
else:
fail("unexpected distribution:", distrib)

result.append(struct(
name = name,
version = version,
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2 changes: 2 additions & 0 deletions java/extensions.bzl
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Original file line number Diff line number Diff line change
Expand Up @@ -22,6 +22,7 @@ load(
"remote_jdk17_repos",
"remote_jdk21_repos",
"remote_jdk25_repos",
"remote_jdk27_repos",
"remote_jdk8_repos",
)
load("//toolchains:extensions.bzl", _java_repository = "java_repository")
Expand All @@ -34,6 +35,7 @@ def _toolchains_impl(module_ctx):
remote_jdk17_repos()
remote_jdk21_repos()
remote_jdk25_repos()
remote_jdk27_repos()

if bazel_features.external_deps.extension_metadata_has_reproducible:
return module_ctx.extension_metadata(reproducible = True)
Expand Down
71 changes: 71 additions & 0 deletions java/repositories.bzl
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Expand Up @@ -413,6 +413,72 @@ _REMOTE_JDK_CONFIGS_LIST = [
urls = ["https://github.com/adoptium/temurin25-binaries/releases/download/jdk-25.0.2+10/OpenJDK25U-jdk_s390x_linux_hotspot_25.0.2_10.tar.gz", "https://mirror.bazel.build/github.com/adoptium/temurin25-binaries/releases/download/jdk-25.0.2+10/OpenJDK25U-jdk_s390x_linux_hotspot_25.0.2_10.tar.gz"],
version = "25",
),
struct(
name = "remotejdk27_linux_aarch64",
target_compatible_with = ["@platforms//os:linux", "@platforms//cpu:aarch64"],
sha256 = "9fa5bf865783c43840101fcdc3a5222b60daf4fe11f26806247bf807c08aba38",
strip_prefix = "zulu27.28.101-ca-jdk27.0.0-linux_aarch64",
urls = ["https://cdn.azul.com/zulu/bin/zulu27.28.101-ca-jdk27.0.0-linux_aarch64.tar.gz", "https://mirror.bazel.build/cdn.azul.com/zulu/bin/zulu27.28.101-ca-jdk27.0.0-linux_aarch64.tar.gz"],
version = "27",
),
struct(
name = "remotejdk27_linux",
target_compatible_with = ["@platforms//os:linux", "@platforms//cpu:x86_64"],
sha256 = "ccbc15c4edbedfdcc03c2d29a2aa2c6daf9e6ffb4cda7dd5ece0fcbb37350267",
strip_prefix = "zulu27.28.101-ca-jdk27.0.0-linux_x64",
urls = ["https://cdn.azul.com/zulu/bin/zulu27.28.101-ca-jdk27.0.0-linux_x64.tar.gz", "https://mirror.bazel.build/cdn.azul.com/zulu/bin/zulu27.28.101-ca-jdk27.0.0-linux_x64.tar.gz"],
version = "27",
),
struct(
name = "remotejdk27_macos_aarch64",
target_compatible_with = ["@platforms//os:macos", "@platforms//cpu:aarch64"],
sha256 = "0d8f1d1912fa938ebd95499eb1e8a2a987725fe42aa0dd98497bb604748a8d07",
strip_prefix = "zulu27.28.101-ca-jdk27.0.0-macosx_aarch64",
urls = ["https://cdn.azul.com/zulu/bin/zulu27.28.101-ca-jdk27.0.0-macosx_aarch64.tar.gz", "https://mirror.bazel.build/cdn.azul.com/zulu/bin/zulu27.28.101-ca-jdk27.0.0-macosx_aarch64.tar.gz"],
version = "27",
patch_cmds = ["ln -s Contents/Home/* ."],
),
struct(
name = "remotejdk27_macos",
target_compatible_with = ["@platforms//os:macos", "@platforms//cpu:x86_64"],
sha256 = "b5d64393a228ad8680e5936cb114243118d3f6d87b668f0280ef8c15d674439c",
strip_prefix = "zulu27.28.101-ca-jdk27.0.0-macosx_x64",
urls = ["https://cdn.azul.com/zulu/bin/zulu27.28.101-ca-jdk27.0.0-macosx_x64.tar.gz", "https://mirror.bazel.build/cdn.azul.com/zulu/bin/zulu27.28.101-ca-jdk27.0.0-macosx_x64.tar.gz"],
version = "27",
patch_cmds = ["ln -s Contents/Home/* ."],
),
struct(
name = "remotejdk27_win",
target_compatible_with = ["@platforms//os:windows", "@platforms//cpu:x86_64"],
sha256 = "99395b64049c2754005746c4f4b66fdb80c98c3cabaa14d4b25a7f8815c997b8",
strip_prefix = "zulu27.28.101-ca-jdk27.0.0-win_x64",
urls = ["https://cdn.azul.com/zulu/bin/zulu27.28.101-ca-jdk27.0.0-win_x64.zip", "https://mirror.bazel.build/cdn.azul.com/zulu/bin/zulu27.28.101-ca-jdk27.0.0-win_x64.zip"],
version = "27",
),
struct(
name = "remotejdk27_linux_ppc64le",
target_compatible_with = ["@platforms//os:linux", "@platforms//cpu:ppc64le"],
sha256 = "49a350d6e0fe41f7ee94ffaf101f0951f35042e86c52efa8a751a38fcb2126bb",
strip_prefix = "jdk-27+35",
urls = ["https://github.com/adoptium/temurin27-binaries/releases/download/jdk-27+35/OpenJDK27U-jdk_ppc64le_linux_hotspot_27_35.tar.gz", "https://mirror.bazel.build/github.com/adoptium/temurin27-binaries/releases/download/jdk-27+35/OpenJDK27U-jdk_ppc64le_linux_hotspot_27_35.tar.gz"],
version = "27",
),
struct(
name = "remotejdk27_linux_riscv64",
target_compatible_with = ["@platforms//os:linux", "@platforms//cpu:riscv64"],
sha256 = "270d74d7732adbaa7af4e153154126c144e6000bb736fd0985421f75075555aa",
strip_prefix = "jdk-27+35",
urls = ["https://github.com/adoptium/temurin27-binaries/releases/download/jdk-27+35/OpenJDK27U-jdk_riscv64_linux_hotspot_27_35.tar.gz", "https://mirror.bazel.build/github.com/adoptium/temurin27-binaries/releases/download/jdk-27+35/OpenJDK27U-jdk_riscv64_linux_hotspot_27_35.tar.gz"],
version = "27",
),
struct(
name = "remotejdk27_linux_s390x",
target_compatible_with = ["@platforms//os:linux", "@platforms//cpu:s390x"],
sha256 = "5bc83a1453c2b68963218717f138512ce10d7553a68432082e6553ac31fa829b",
strip_prefix = "jdk-27+35",
urls = ["https://github.com/adoptium/temurin27-binaries/releases/download/jdk-27+35/OpenJDK27U-jdk_s390x_linux_hotspot_27_35.tar.gz", "https://mirror.bazel.build/github.com/adoptium/temurin27-binaries/releases/download/jdk-27+35/OpenJDK27U-jdk_s390x_linux_hotspot_27_35.tar.gz"],
version = "27",
),
]

def _make_version_to_remote_jdks():
Expand Down Expand Up @@ -462,6 +528,10 @@ def remote_jdk25_repos():
"""Imports OpenJDK 25 repositories."""
_remote_jdk_repos_for_version("25")

def remote_jdk27_repos():
"""Imports OpenJDK 27 repositories."""
_remote_jdk_repos_for_version("27")

def rules_java_dependencies():
"""DEPRECATED: No-op, kept for backwards compatibility"""
print("DEPRECATED: use rules_java_dependencies() from rules_java_deps.bzl") # buildifier: disable=print
Expand All @@ -478,6 +548,7 @@ def rules_java_toolchains(name = "toolchains"):
remote_jdk17_repos()
remote_jdk21_repos()
remote_jdk25_repos()
remote_jdk27_repos()
java_tools_repos()

native.register_toolchains(
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16 changes: 16 additions & 0 deletions toolchains/BUILD
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Expand Up @@ -396,6 +396,16 @@ RELEASES = (8, 9, 10, 11, 17, 21, 25)
for release in RELEASES
]

# The default configuration runs javac on JDK 25, which rejects source/target 27.
# Use JDK 27 here without changing the compiler JDK for older language versions.
default_java_toolchain(
name = "toolchain_jdk_27",
configuration = DEFAULT_TOOLCHAIN_CONFIGURATION,
java_runtime = ":remotejdk_27",
source_version = "27",
target_version = "27",
)

default_java_toolchain(
name = "prebuilt_toolchain",
configuration = PREBUILT_TOOLCHAIN_CONFIGURATION,
Expand Down Expand Up @@ -427,6 +437,12 @@ java_runtime_version_alias(
visibility = ["//visibility:public"],
)

java_runtime_version_alias(
name = "remotejdk_27",
runtime_version = "remotejdk_27",
visibility = ["//visibility:public"],
)

java_runtime_version_alias(
name = "jdk_8",
runtime_version = "8",
Expand Down