feat: Add distribution detection support to .sdkmanrc file (#975)

* feat: Add distribution detection support to .sdkmanrc file

Extends .sdkmanrc support to automatically detect Java distribution from SDKMAN identifiers (e.g., java=21.0.5-tem maps to temurin distribution).

Makes distribution input optional when using .sdkmanrc with distribution suffix.

* fix: align SDKMAN sem identifier mapping

* fix: support SDKMAN albba identifier

* docs: clarify sdkmanrc distribution inference scope

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

* Add Tencent Kona SDKMAN mapping and format sdkmanrc docs as a table

- Map SDKMAN 'kona' identifier to the 'kona' distribution (added in #672)
- Add a .sdkmanrc test case for the kona suffix
- Convert the inline SDKMAN suffix mapping in advanced-usage.md to a table
- Rebuild dist bundles

Co-authored-by: Copilot App <223556219+Copilot@users.noreply.github.com>

---------

Co-authored-by: Bruno Borges <brborges@microsoft.com>
Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>
Co-authored-by: Bruno Borges <bruno.borges@gmail.com>

README.md

@@ -29,9 +29,9 @@ For more details,  see the full release notes on the [releases page](https://git
 
   - `java-version`: The Java version that is going to be set up. Takes a whole or [semver](#supported-version-syntax) Java version. If not specified, the action will expect `java-version-file` input to be specified.
 
-  - `java-version-file`: The path to a file containing java version. Supported file types are `.java-version` and `.tool-versions`. See more details in [about .java-version-file](docs/advanced-usage.md#Java-version-file).
+  - `java-version-file`: The path to a file containing java version. Supported file types are `.java-version`, `.tool-versions`, and `.sdkmanrc`. See more details in [about .java-version-file](docs/advanced-usage.md#Java-version-file).
 
-  - `distribution`: _(required)_ Java [distribution](#supported-distributions).
+  - `distribution`: Java [distribution](#supported-distributions). Required unless `java-version-file` points to `.sdkmanrc` with a recognized distribution suffix (for example `java=21.0.5-tem`).
 
   - `java-package`: The packaging variant of the chosen distribution. Possible values: `jdk`, `jre`, `jdk+fx`, `jre+fx`. Default value: `jdk`.
 

__tests__/data/sdkman-java-versions.csv

@@ -2,7 +2,7 @@
 7.0.352-zulu, 7.0.352
 8.0.282-trava, 8.0.282
 8.0.432-albba, 8.0.432
-8.0.432-amzn, 8.0.432
+8.0.432-amzn, 8
 8.0.432-kona, 8.0.432
 8.0.432-librca, 8.0.432
 8.0.432-sem, 8.0.432
@@ -10,7 +10,7 @@
 8.0.432-zulu, 8.0.432
 8.0.432.fx-librca, 8.0.432
 8.0.432.fx-zulu, 8.0.432
-8.0.442-amzn, 8.0.442
+8.0.442-amzn, 8
 8.0.442-librca, 8.0.442
 8.0.442-tem, 8.0.442
 8.0.442-zulu, 8.0.442
@@ -19,7 +19,7 @@
 11.0.14.1-jbr, 11.0.14
 11.0.15-trava, 11.0.15
 11.0.25-albba, 11.0.25
-11.0.25-amzn, 11.0.25
+11.0.25-amzn, 11
 11.0.25-kona, 11.0.25
 11.0.25-librca, 11.0.25
 11.0.25-ms, 11.0.25
@@ -29,7 +29,7 @@
 11.0.25-zulu, 11.0.25
 11.0.25.fx-librca, 11.0.25
 11.0.25.fx-zulu, 11.0.25
-11.0.26-amzn, 11.0.26
+11.0.26-amzn, 11
 11.0.26-librca, 11.0.26
 11.0.26-ms, 11.0.26
 11.0.26-sapmchn, 11.0.26
@@ -40,7 +40,7 @@
 17.0.12-jbr, 17.0.12
 17.0.12-oracle, 17.0.12
 17.0.13-albba, 17.0.13
-17.0.13-amzn, 17.0.13
+17.0.13-amzn, 17
 17.0.13-kona, 17.0.13
 17.0.13-librca, 17.0.13
 17.0.13-ms, 17.0.13
@@ -52,7 +52,7 @@
 17.0.13.crac-zulu, 17.0.13
 17.0.13.fx-librca, 17.0.13
 17.0.13.fx-zulu, 17.0.13
-17.0.14-amzn, 17.0.14
+17.0.14-amzn, 17
 17.0.14-librca, 17.0.14
 17.0.14-ms, 17.0.14
 17.0.14-sapmchn, 17.0.14
@@ -62,7 +62,7 @@
 17.0.9-graalce, 17.0.9
 21.0.2-graalce, 21.0.2
 21.0.2-open, 21.0.2
-21.0.5-amzn, 21.0.5
+21.0.5-amzn, 21
 21.0.5-graal, 21.0.5
 21.0.5-jbr, 21.0.5
 21.0.5-kona, 21.0.5
@@ -77,7 +77,7 @@
 21.0.5.crac-zulu, 21.0.5
 21.0.5.fx-librca, 21.0.5
 21.0.5.fx-zulu, 21.0.5
-21.0.6-amzn, 21.0.6
+21.0.6-amzn, 21
 21.0.6-graal, 21.0.6
 21.0.6-librca, 21.0.6
 21.0.6-ms, 21.0.6
@@ -94,7 +94,7 @@
 22.3.5.r17-mandrel, 22.3.5
 22.3.5.r17-nik, 22.3.5
 23-open, 23
-23.0.1-amzn, 23.0.1
+23.0.1-amzn, 23
 23.0.1-graal, 23.0.1
 23.0.1-graalce, 23.0.1
 23.0.1-librca, 23.0.1
@@ -106,7 +106,7 @@
 23.0.1.crac-zulu, 23.0.1
 23.0.1.fx-librca, 23.0.1
 23.0.1.fx-zulu, 23.0.1
-23.0.2-amzn, 23.0.2
+23.0.2-amzn, 23
 23.0.2-graal, 23.0.2
 23.0.2-graalce, 23.0.2
 23.0.2-librca, 23.0.2

__tests__/util.test.ts

@@ -166,15 +166,60 @@ describe('validatePaginationUrl', () => {
 describe('getVersionFromFileContent', () => {
   describe('.sdkmanrc', () => {
     it.each([
-      ['java=11.0.20.1-tem', '11.0.20'],
+      ['java=11.0.20.1-tem', '11.0.20', 'temurin'],
-      ['java = 11.0.20.1-tem', '11.0.20'],
+      ['java = 11.0.20.1-tem', '11.0.20', 'temurin'],
-      ['java=11.0.20.1-tem # a comment in sdkmanrc', '11.0.20'],
+      ['java=11.0.20.1-tem # a comment in sdkmanrc', '11.0.20', 'temurin'],
-      ['java=11.0.20.1-tem\n#java=21.0.20.1-tem\n', '11.0.20'], // choose first match
+      ['java=11.0.20.1-tem\n#java=21.0.20.1-tem\n', '11.0.20', 'temurin'], // choose first match
-      ['java=11.0.20.1-tem\njava=21.0.20.1-tem\n', '11.0.20'], // choose first match
+      ['java=11.0.20.1-tem\njava=21.0.20.1-tem\n', '11.0.20', 'temurin'], // choose first match
-      ['#java=11.0.20.1-tem\njava=21.0.20.1-tem\n', '21.0.20'] // first one is 'commented' in .sdkmanrc
+      ['#java=11.0.20.1-tem\njava=21.0.20.1-tem\n', '21.0.20', 'temurin'], // first one is 'commented' in .sdkmanrc
-    ])('parsing %s should return %s', (content: string, expected: string) => {
+      ['java=21.0.5-zulu', '21.0.5', 'zulu'],
-      const actual = getVersionFromFileContent(content, 'openjdk', '.sdkmanrc');
+      ['java=17.0.13-albba', '17.0.13', 'dragonwell'],
-      expect(actual).toBe(expected);
+      ['java=17.0.13-amzn', '17', 'corretto'],
+      ['java=21.0.5-graal', '21.0.5', 'graalvm'],
+      ['java=17.0.9-graalce', '17.0.9', 'graalvm'],
+      ['java=11.0.25-librca', '11.0.25', 'liberica'],
+      ['java=11.0.25-ms', '11.0.25', 'microsoft'],
+      ['java=21.0.5-oracle', '21.0.5', 'oracle'],
+      ['java=11.0.25-sapmchn', '11.0.25', 'sapmachine'],
+      ['java=21.0.5-jbr', '21.0.5', 'jetbrains'],
+      ['java=11.0.25-sem', '11.0.25', 'semeru'],
+      ['java=17.0.13-dragonwell', '17.0.13', 'dragonwell'],
+      ['java=21.0.5-kona', '21.0.5', 'kona']
+    ])(
+      'parsing %s should return version %s and distribution %s',
+      (content: string, expectedVersion: string, expectedDist: string) => {
+        const actual = getVersionFromFileContent(
+          content,
+          'openjdk',
+          '.sdkmanrc'
+        );
+        expect(actual?.version).toBe(expectedVersion);
+        expect(actual?.distribution).toBe(expectedDist);
+      }
+    );
+
+    it('should warn and return undefined distribution for unknown identifier', () => {
+      const warnSpy = jest.spyOn(core, 'warning');
+      const actual = getVersionFromFileContent(
+        'java=21.0.5-unknown',
+        'temurin',
+        '.sdkmanrc'
+      );
+      expect(actual?.version).toBe('21.0.5');
+      expect(actual?.distribution).toBeUndefined();
+      expect(warnSpy).toHaveBeenCalledWith(
+        expect.stringContaining('Unknown SDKMAN distribution identifier')
+      );
+    });
+
+    it('should return version without distribution when no suffix provided', () => {
+      const actual = getVersionFromFileContent(
+        'java=11.0.20',
+        'temurin',
+        '.sdkmanrc'
+      );
+      expect(actual?.version).toBe('11.0.20');
+      expect(actual?.distribution).toBeUndefined();
     });
 
     describe('known versions', () => {
@@ -193,7 +238,7 @@ describe('getVersionFromFileContent', () => {
             'openjdk',
             '.sdkmanrc'
           );
-          expect(actual).toBe(expected);
+          expect(actual?.version).toBe(expected);
         }
       );
     });

action.yml

@@ -10,8 +10,8 @@ inputs:
     description: 'The path to a file containing the Java version to set up (.java-version, .tool-versions, .sdkmanrc). Used when java-version is not set. See examples of supported syntax in README file'
     required: false
   distribution:
-    description: 'Java distribution. See the list of supported distributions in README file'
+    description: 'Java distribution. See the list of supported distributions in README file. This input is required except when java-version-file points to .sdkmanrc with a recognized distribution suffix (e.g., java=21.0.5-tem).'
-    required: true
+    required: false
   java-package:
     description: 'The package type (jdk, jre, jdk+fx, jre+fx)'
     required: false

dist/cleanup/index.js

@@ -52572,8 +52572,9 @@ function isCacheFeatureAvailable() {
 }
 exports.isCacheFeatureAvailable = isCacheFeatureAvailable;
 function getVersionFromFileContent(content, distributionName, versionFile) {
-    var _a, _b, _c, _d, _e;
+    var _a, _b, _c;
     let javaVersionRegExp;
+    let extractedDistribution;
     function getFileName(versionFile) {
         return path_1.default.basename(versionFile);
     }
@@ -52583,14 +52584,23 @@ function getVersionFromFileContent(content, distributionName, versionFile) {
             /^java\s+(?:\S*-)?(?<version>\d+(?:\.\d+)*([+_.-](?:openj9[-._]?\d[\w.-]*|java\d+|jre[-_\w]*|OpenJDK\d+[\w_.-]*|[a-z0-9]+))*)/im;
     }
     else if (versionFileName == '.sdkmanrc') {
-        javaVersionRegExp = /^java\s*=\s*(?<version>[^-]+)/m;
+        // Match both version and optional distribution identifier
+        javaVersionRegExp =
+            /^java\s*=\s*(?<version>[^-\s]+)(?:-(?<distribution>[a-z0-9]+))?/m;
     }
     else {
         javaVersionRegExp = /(?<version>(?<=(^|\s|-))(\d+\S*))(\s|$)/;
     }
-    const capturedVersion = ((_b = (_a = content.match(javaVersionRegExp)) === null || _a === void 0 ? void 0 : _a.groups) === null || _b === void 0 ? void 0 : _b.version)
+    const match = content.match(javaVersionRegExp);
-        ? (_d = (_c = content.match(javaVersionRegExp)) === null || _c === void 0 ? void 0 : _c.groups) === null || _d === void 0 ? void 0 : _d.version
+    const capturedVersion = ((_a = match === null || match === void 0 ? void 0 : match.groups) === null || _a === void 0 ? void 0 : _a.version)
+        ? match.groups.version
         : '';
+    // Extract distribution from .sdkmanrc file
+    if (versionFileName == '.sdkmanrc' && ((_b = match === null || match === void 0 ? void 0 : match.groups) === null || _b === void 0 ? void 0 : _b.distribution)) {
+        const sdkmanDist = match.groups.distribution;
+        extractedDistribution = mapSdkmanDistribution(sdkmanDist);
+        core.debug(`Parsed distribution '${extractedDistribution}' from SDKMAN identifier '${sdkmanDist}'`);
+    }
     core.debug(`Parsed version '${capturedVersion}' from file '${versionFileName}'`);
     if (!capturedVersion) {
         return null;
@@ -52604,13 +52614,42 @@ function getVersionFromFileContent(content, distributionName, versionFile) {
     if (!version) {
         return null;
     }
-    if (constants_1.DISTRIBUTIONS_ONLY_MAJOR_VERSION.includes(distributionName)) {
+    // Apply DISTRIBUTIONS_ONLY_MAJOR_VERSION logic whenever the effective distribution
-        const coerceVersion = (_e = semver.coerce(version)) !== null && _e !== void 0 ? _e : version;
+    // (either explicitly provided or extracted from the version file) is in the list.
+    if (constants_1.DISTRIBUTIONS_ONLY_MAJOR_VERSION.includes(extractedDistribution || distributionName)) {
+        const coerceVersion = (_c = semver.coerce(version)) !== null && _c !== void 0 ? _c : version;
         version = semver.major(coerceVersion).toString();
     }
-    return version.toString();
+    return {
+        version: version.toString(),
+        distribution: extractedDistribution
+    };
 }
 exports.getVersionFromFileContent = getVersionFromFileContent;
+// Map SDKMAN distribution identifiers to setup-java distribution names
+function mapSdkmanDistribution(sdkmanDist) {
+    const distributionMap = {
+        tem: 'temurin',
+        sem: 'semeru',
+        albba: 'dragonwell',
+        zulu: 'zulu',
+        amzn: 'corretto',
+        graal: 'graalvm',
+        graalce: 'graalvm',
+        librca: 'liberica',
+        ms: 'microsoft',
+        oracle: 'oracle',
+        sapmchn: 'sapmachine',
+        jbr: 'jetbrains',
+        dragonwell: 'dragonwell',
+        kona: 'kona'
+    };
+    const mapped = distributionMap[sdkmanDist.toLowerCase()];
+    if (!mapped) {
+        core.warning(`Unknown SDKMAN distribution identifier '${sdkmanDist}'. Please specify the distribution explicitly.`);
+    }
+    return mapped;
+}
 // By convention, action expects version 8 in the format `8.*` instead of `1.8`
 function avoidOldNotation(content) {
     return content.startsWith('1.') ? content.substring(2) : content;

dist/setup/index.js

@@ -81542,9 +81542,7 @@ function run() {
     return __awaiter(this, void 0, void 0, function* () {
         try {
             const versions = core.getMultilineInput(constants.INPUT_JAVA_VERSION);
-            const distributionName = core.getInput(constants.INPUT_DISTRIBUTION, {
+            let distributionName = core.getInput(constants.INPUT_DISTRIBUTION);
-                required: true
-            });
             const versionFile = core.getInput(constants.INPUT_JAVA_VERSION_FILE);
             const architecture = core.getInput(constants.INPUT_ARCHITECTURE);
             const packageType = core.getInput(constants.INPUT_JAVA_PACKAGE);
@@ -81563,6 +81561,22 @@ function run() {
             if (!versions.length && !versionFile) {
                 throw new Error('java-version or java-version-file input expected');
             }
+            if (!versions.length) {
+                core.debug('java-version input is empty, looking for java-version-file input');
+                const content = fs_1.default.readFileSync(versionFile).toString().trim();
+                const versionInfo = (0, util_1.getVersionFromFileContent)(content, distributionName, versionFile);
+                core.debug(`Parsed version from file '${versionInfo === null || versionInfo === void 0 ? void 0 : versionInfo.version}'`);
+                if (!versionInfo) {
+                    throw new Error(`No supported version was found in file ${versionFile}`);
+                }
+                // Use distribution from file if available, otherwise use the input
+                if (versionInfo.distribution) {
+                    core.info(`Using distribution '${versionInfo.distribution}' from ${versionFile}`);
+                    distributionName = versionInfo.distribution;
+                }
+                else if (!distributionName) {
+                    throw new Error('distribution input is required when not specified in the version file');
+                }
                 const installerInputsOptions = {
                     architecture,
                     packageType,
@@ -81574,19 +81588,28 @@ function run() {
                     jdkFile,
                     toolchainIds
                 };
-            if (!versions.length) {
+                yield installVersion(versionInfo.version, installerInputsOptions);
-                core.debug('java-version input is empty, looking for java-version-file input');
-                const content = fs_1.default.readFileSync(versionFile).toString().trim();
-                const version = (0, util_1.getVersionFromFileContent)(content, distributionName, versionFile);
-                core.debug(`Parsed version from file '${version}'`);
-                if (!version) {
-                    throw new Error(`No supported version was found in file ${versionFile}`);
             }
-                yield installVersion(version, installerInputsOptions);
+            else {
+                // When using java-version input, distribution is still required
+                if (!distributionName) {
+                    throw new Error('distribution input is required');
                 }
+                const installerInputsOptions = {
+                    architecture,
+                    packageType,
+                    checkLatest,
+                    setDefault,
+                    verifySignature,
+                    verifySignaturePublicKey,
+                    distributionName,
+                    jdkFile,
+                    toolchainIds
+                };
                 for (const [index, version] of versions.entries()) {
                     yield installVersion(version, installerInputsOptions, index);
                 }
+            }
             core.endGroup();
             const matchersPath = path.join(__dirname, '..', '..', '.github');
             core.info(`##[add-matcher]${path.join(matchersPath, 'java.json')}`);
@@ -81967,8 +81990,9 @@ function isCacheFeatureAvailable() {
 }
 exports.isCacheFeatureAvailable = isCacheFeatureAvailable;
 function getVersionFromFileContent(content, distributionName, versionFile) {
-    var _a, _b, _c, _d, _e;
+    var _a, _b, _c;
     let javaVersionRegExp;
+    let extractedDistribution;
     function getFileName(versionFile) {
         return path_1.default.basename(versionFile);
     }
@@ -81978,14 +82002,23 @@ function getVersionFromFileContent(content, distributionName, versionFile) {
             /^java\s+(?:\S*-)?(?<version>\d+(?:\.\d+)*([+_.-](?:openj9[-._]?\d[\w.-]*|java\d+|jre[-_\w]*|OpenJDK\d+[\w_.-]*|[a-z0-9]+))*)/im;
     }
     else if (versionFileName == '.sdkmanrc') {
-        javaVersionRegExp = /^java\s*=\s*(?<version>[^-]+)/m;
+        // Match both version and optional distribution identifier
+        javaVersionRegExp =
+            /^java\s*=\s*(?<version>[^-\s]+)(?:-(?<distribution>[a-z0-9]+))?/m;
     }
     else {
         javaVersionRegExp = /(?<version>(?<=(^|\s|-))(\d+\S*))(\s|$)/;
     }
-    const capturedVersion = ((_b = (_a = content.match(javaVersionRegExp)) === null || _a === void 0 ? void 0 : _a.groups) === null || _b === void 0 ? void 0 : _b.version)
+    const match = content.match(javaVersionRegExp);
-        ? (_d = (_c = content.match(javaVersionRegExp)) === null || _c === void 0 ? void 0 : _c.groups) === null || _d === void 0 ? void 0 : _d.version
+    const capturedVersion = ((_a = match === null || match === void 0 ? void 0 : match.groups) === null || _a === void 0 ? void 0 : _a.version)
+        ? match.groups.version
         : '';
+    // Extract distribution from .sdkmanrc file
+    if (versionFileName == '.sdkmanrc' && ((_b = match === null || match === void 0 ? void 0 : match.groups) === null || _b === void 0 ? void 0 : _b.distribution)) {
+        const sdkmanDist = match.groups.distribution;
+        extractedDistribution = mapSdkmanDistribution(sdkmanDist);
+        core.debug(`Parsed distribution '${extractedDistribution}' from SDKMAN identifier '${sdkmanDist}'`);
+    }
     core.debug(`Parsed version '${capturedVersion}' from file '${versionFileName}'`);
     if (!capturedVersion) {
         return null;
@@ -81999,13 +82032,42 @@ function getVersionFromFileContent(content, distributionName, versionFile) {
     if (!version) {
         return null;
     }
-    if (constants_1.DISTRIBUTIONS_ONLY_MAJOR_VERSION.includes(distributionName)) {
+    // Apply DISTRIBUTIONS_ONLY_MAJOR_VERSION logic whenever the effective distribution
-        const coerceVersion = (_e = semver.coerce(version)) !== null && _e !== void 0 ? _e : version;
+    // (either explicitly provided or extracted from the version file) is in the list.
+    if (constants_1.DISTRIBUTIONS_ONLY_MAJOR_VERSION.includes(extractedDistribution || distributionName)) {
+        const coerceVersion = (_c = semver.coerce(version)) !== null && _c !== void 0 ? _c : version;
         version = semver.major(coerceVersion).toString();
     }
-    return version.toString();
+    return {
+        version: version.toString(),
+        distribution: extractedDistribution
+    };
 }
 exports.getVersionFromFileContent = getVersionFromFileContent;
+// Map SDKMAN distribution identifiers to setup-java distribution names
+function mapSdkmanDistribution(sdkmanDist) {
+    const distributionMap = {
+        tem: 'temurin',
+        sem: 'semeru',
+        albba: 'dragonwell',
+        zulu: 'zulu',
+        amzn: 'corretto',
+        graal: 'graalvm',
+        graalce: 'graalvm',
+        librca: 'liberica',
+        ms: 'microsoft',
+        oracle: 'oracle',
+        sapmchn: 'sapmachine',
+        jbr: 'jetbrains',
+        dragonwell: 'dragonwell',
+        kona: 'kona'
+    };
+    const mapped = distributionMap[sdkmanDist.toLowerCase()];
+    if (!mapped) {
+        core.warning(`Unknown SDKMAN distribution identifier '${sdkmanDist}'. Please specify the distribution explicitly.`);
+    }
+    return mapped;
+}
 // By convention, action expects version 8 in the format `8.*` instead of `1.8`
 function avoidOldNotation(content) {
     return content.startsWith('1.') ? content.substring(2) : content;

docs/advanced-usage.md

@@ -781,18 +781,34 @@ steps:
   Supported files are `.java-version`, `.tool-versions` and `.sdkmanrc`.
   * In `.java-version` file, only the version should be specified (e.g., 17.0.7). The `.java-version` file recognizes all variants of the version description according to [jenv](https://github.com/jenv/jenv).
   * In `.tool-versions` file, java version should be preceded by the java keyword (e.g., java 17.0.7). The `.tool-versions` file supports version specifications in accordance with [asdf](https://github.com/asdf-vm/asdf) standards, adhering to Semantic Versioning ([semver](https://semver.org/)).
-  * In `.sdkmanrc` file, java version should be preceded by the `java=` prefix (e.g., java=17.0.7-tem) and include the distribution. The `.sdkmanrc` file supports version specifications in accordance with [file format](https://sdkman.io/usage#env-command), see [Sdkman! documentation](https://sdkman.io/jdks) for more information.
+  * In `.sdkmanrc` file, java version should be preceded by the `java=` prefix (e.g., `java=17.0.7-tem`). When a recognized SDKMAN distribution suffix is present, setup-java can infer the `distribution` input automatically. Unrecognized suffixes require setting `distribution` explicitly. The `.sdkmanrc` file supports version specifications in accordance with [file format](https://sdkman.io/usage#env-command), see [Sdkman! documentation](https://sdkman.io/jdks) for more information.
+
+    Supported SDKMAN suffix mappings:
+
+    | SDKMAN suffix | setup-java distribution |
+    | ------------- | ----------------------- |
+    | `tem` | `temurin` |
+    | `sem` | `semeru` |
+    | `albba`, `dragonwell` | `dragonwell` |
+    | `zulu` | `zulu` |
+    | `amzn` | `corretto` |
+    | `graal`, `graalce` | `graalvm` |
+    | `librca` | `liberica` |
+    | `ms` | `microsoft` |
+    | `oracle` | `oracle` |
+    | `sapmchn` | `sapmachine` |
+    | `jbr` | `jetbrains` |
+    | `kona` | `kona` |
 
     
   If both `java-version` and `java-version-file` **inputs** are provided, the `java-version` input will be used.
 
-**Example step using `Sdkman!`**:
+**Example step using `Sdkman!`** (distribution inferred from `.sdkmanrc`):
 ```yml
   - name: Setup java
     uses: actions/setup-java@v5
     with:
       java-version-file: '.sdkmanrc'
-      distribution: 'temurin'
 ```
 
 **Example `.sdkmanrc`**:

src/setup-java.ts

@@ -17,9 +17,7 @@ import {configureMavenArgs} from './maven-args';
 async function run() {
   try {
     const versions = core.getMultilineInput(constants.INPUT_JAVA_VERSION);
-    const distributionName = core.getInput(constants.INPUT_DISTRIBUTION, {
+    let distributionName = core.getInput(constants.INPUT_DISTRIBUTION);
-      required: true
-    });
     const versionFile = core.getInput(constants.INPUT_JAVA_VERSION_FILE);
     const architecture = core.getInput(constants.INPUT_ARCHITECTURE);
     const packageType = core.getInput(constants.INPUT_JAVA_PACKAGE);
@@ -48,6 +46,37 @@ async function run() {
       throw new Error('java-version or java-version-file input expected');
     }
 
+    if (!versions.length) {
+      core.debug(
+        'java-version input is empty, looking for java-version-file input'
+      );
+      const content = fs.readFileSync(versionFile).toString().trim();
+
+      const versionInfo = getVersionFromFileContent(
+        content,
+        distributionName,
+        versionFile
+      );
+      core.debug(`Parsed version from file '${versionInfo?.version}'`);
+
+      if (!versionInfo) {
+        throw new Error(
+          `No supported version was found in file ${versionFile}`
+        );
+      }
+
+      // Use distribution from file if available, otherwise use the input
+      if (versionInfo.distribution) {
+        core.info(
+          `Using distribution '${versionInfo.distribution}' from ${versionFile}`
+        );
+        distributionName = versionInfo.distribution;
+      } else if (!distributionName) {
+        throw new Error(
+          'distribution input is required when not specified in the version file'
+        );
+      }
+
       const installerInputsOptions: installerInputsOptions = {
         architecture,
         packageType,
@@ -60,31 +89,29 @@ async function run() {
         toolchainIds
       };
 
-    if (!versions.length) {
+      await installVersion(versionInfo.version, installerInputsOptions);
-      core.debug(
+    } else {
-        'java-version input is empty, looking for java-version-file input'
+      // When using java-version input, distribution is still required
-      );
+      if (!distributionName) {
-      const content = fs.readFileSync(versionFile).toString().trim();
+        throw new Error('distribution input is required');
+      }
 
-      const version = getVersionFromFileContent(
+      const installerInputsOptions: installerInputsOptions = {
-        content,
+        architecture,
+        packageType,
+        checkLatest,
+        setDefault,
+        verifySignature,
+        verifySignaturePublicKey,
         distributionName,
-        versionFile
+        jdkFile,
-      );
+        toolchainIds
-      core.debug(`Parsed version from file '${version}'`);
+      };
-
-      if (!version) {
-        throw new Error(
-          `No supported version was found in file ${versionFile}`
-        );
-      }
-
-      await installVersion(version, installerInputsOptions);
-    }
 
       for (const [index, version] of versions.entries()) {
         await installVersion(version, installerInputsOptions, index);
       }
+    }
     core.endGroup();
     const matchersPath = path.join(__dirname, '..', '..', '.github');
     core.info(`##[add-matcher]${path.join(matchersPath, 'java.json')}`);

src/util.ts

@@ -127,12 +127,18 @@ export function isCacheFeatureAvailable(): boolean {
   return false;
 }
 
+export interface VersionInfo {
+  version: string;
+  distribution?: string;
+}
+
 export function getVersionFromFileContent(
   content: string,
   distributionName: string,
   versionFile: string
-): string | null {
+): VersionInfo | null {
   let javaVersionRegExp: RegExp;
+  let extractedDistribution: string | undefined;
 
   function getFileName(versionFile: string) {
     return path.basename(versionFile);
@@ -143,15 +149,27 @@ export function getVersionFromFileContent(
     javaVersionRegExp =
       /^java\s+(?:\S*-)?(?<version>\d+(?:\.\d+)*([+_.-](?:openj9[-._]?\d[\w.-]*|java\d+|jre[-_\w]*|OpenJDK\d+[\w_.-]*|[a-z0-9]+))*)/im;
   } else if (versionFileName == '.sdkmanrc') {
-    javaVersionRegExp = /^java\s*=\s*(?<version>[^-]+)/m;
+    // Match both version and optional distribution identifier
+    javaVersionRegExp =
+      /^java\s*=\s*(?<version>[^-\s]+)(?:-(?<distribution>[a-z0-9]+))?/m;
   } else {
     javaVersionRegExp = /(?<version>(?<=(^|\s|-))(\d+\S*))(\s|$)/;
   }
 
-  const capturedVersion = content.match(javaVersionRegExp)?.groups?.version
+  const match = content.match(javaVersionRegExp);
-    ? (content.match(javaVersionRegExp)?.groups?.version as string)
+  const capturedVersion = match?.groups?.version
+    ? (match.groups.version as string)
     : '';
 
+  // Extract distribution from .sdkmanrc file
+  if (versionFileName == '.sdkmanrc' && match?.groups?.distribution) {
+    const sdkmanDist = match.groups.distribution;
+    extractedDistribution = mapSdkmanDistribution(sdkmanDist);
+    core.debug(
+      `Parsed distribution '${extractedDistribution}' from SDKMAN identifier '${sdkmanDist}'`
+    );
+  }
+
   core.debug(
     `Parsed version '${capturedVersion}' from file '${versionFileName}'`
   );
@@ -172,12 +190,49 @@ export function getVersionFromFileContent(
     return null;
   }
 
-  if (DISTRIBUTIONS_ONLY_MAJOR_VERSION.includes(distributionName)) {
+  // Apply DISTRIBUTIONS_ONLY_MAJOR_VERSION logic whenever the effective distribution
+  // (either explicitly provided or extracted from the version file) is in the list.
+  if (
+    DISTRIBUTIONS_ONLY_MAJOR_VERSION.includes(
+      extractedDistribution || distributionName
+    )
+  ) {
     const coerceVersion = semver.coerce(version) ?? version;
     version = semver.major(coerceVersion).toString();
   }
 
-  return version.toString();
+  return {
+    version: version.toString(),
+    distribution: extractedDistribution
+  };
+}
+
+// Map SDKMAN distribution identifiers to setup-java distribution names
+function mapSdkmanDistribution(sdkmanDist: string): string | undefined {
+  const distributionMap: Record<string, string> = {
+    tem: 'temurin',
+    sem: 'semeru',
+    albba: 'dragonwell',
+    zulu: 'zulu',
+    amzn: 'corretto',
+    graal: 'graalvm',
+    graalce: 'graalvm',
+    librca: 'liberica',
+    ms: 'microsoft',
+    oracle: 'oracle',
+    sapmchn: 'sapmachine',
+    jbr: 'jetbrains',
+    dragonwell: 'dragonwell',
+    kona: 'kona'
+  };
+
+  const mapped = distributionMap[sdkmanDist.toLowerCase()];
+  if (!mapped) {
+    core.warning(
+      `Unknown SDKMAN distribution identifier '${sdkmanDist}'. Please specify the distribution explicitly.`
+    );
+  }
+  return mapped;
 }
 
 // By convention, action expects version 8 in the format `8.*` instead of `1.8`