Merge b8162e8075 into 6a0805fcef

On self-hosted runners toolchains.xml may survive multiple runs and unexpectedly
grow as a result of the toolchains setup simply appending the JDK definition
even if one with the same `type` and `provides.id` already exists.

Restructuring the parsing step and filtering the potentially existing list of
toolchain definitions prevents this and also fixes toolchain.xml files that
already contain duplicates.

Fixes #530

__tests__/data/dragonwell.json

@@ -481,6 +481,54 @@
           }
         }
       }
+    },
+    "11.0.23.20.9" : {
+      "alpine-linux" : {
+        "x64" : {
+          "Extended" : {
+            "sha256" : "9d61fefb4f1a8368f8e7eec17893934b438b67f360cb8b7ef727ab459695d14e",
+            "name" : "Alibaba_Dragonwell_Extended_11.0.23.20.9_x64_alpine-linux.tar.gz",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell11/releases/download/dragonwell-extended-11.0.23.20_jdk-11.0.23-ga/Alibaba_Dragonwell_Extended_11.0.23.20.9_x64_alpine-linux.tar.gz"
+          }
+        }
+      },
+      "linux" : {
+        "aarch64" : {
+          "Extended" : {
+            "sha256" : "2f399231644fe1e3f1b4b5298e85f21f4863017767e9e5afb00ee46e2d7780d9",
+            "name" : "Alibaba_Dragonwell_Extended_11.0.23.20.9_aarch64_linux.tar.gz",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell11/releases/download/dragonwell-extended-11.0.23.20_jdk-11.0.23-ga/Alibaba_Dragonwell_Extended_11.0.23.20.9_aarch64_linux.tar.gz"
+          }
+        },
+        "x64" : {
+          "Extended" : {
+            "sha256" : "662dfdc584e21bcfb7ed87942b5bb4e71a7b7467d4c82211a3615d0834d1c833",
+            "name" : "Alibaba_Dragonwell_Extended_11.0.23.20.9_x64_linux.tar.gz",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell11/releases/download/dragonwell-extended-11.0.23.20_jdk-11.0.23-ga/Alibaba_Dragonwell_Extended_11.0.23.20.9_x64_linux.tar.gz"
+          }
+        },
+        "riscv" : {
+          "Extended" : {
+            "sha256" : "f3488461cbfd95e6c08ad2dc01c51950b9c629c46eea6305002311b263ce2ad9",
+            "name" : "Alibaba_Dragonwell_Extended_11.0.23.20.9_riscv64_linux.tar.gz",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell11/releases/download/dragonwell-extended-11.0.23.20_jdk-11.0.23-ga/Alibaba_Dragonwell_Extended_11.0.23.20.9_riscv64_linux.tar.gz"
+          }
+        }
+      },
+      "windows" : {
+        "x64" : {
+          "Extended" : {
+            "sha256" : "ba8dba2b7f2279f87220f396afcce49cb26482705deb5144c6e22a90ba443f9d",
+            "name" : "Alibaba_Dragonwell_Extended_11.0.23.20.9_x64_windows.zip",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell11/releases/download/dragonwell-extended-11.0.23.20_jdk-11.0.23-ga/Alibaba_Dragonwell_Extended_11.0.23.20.9_x64_windows.zip"
+          }
+        }
+      }
     }
   },
   "17":{
@@ -1134,5 +1182,143 @@
         }
       }
     }
+  },
+  "21" : {
+    "21.0.3.0.3.9" : {
+      "alpine-linux" : {
+        "x64" : {
+          "Standard" : {
+            "sha256" : "c3c5d193a0a6aee8757fd3036dc13b7921a4306b089bf8759ba6b822d1e8416e",
+            "name" : "Alibaba_Dragonwell_Standard_21.0.3.0.3.9_x64_alpine-linux.tar.gz",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.3.0.3%2B9_jdk-21.0.3-ga/Alibaba_Dragonwell_Standard_21.0.3.0.3.9_x64_alpine-linux.tar.gz"
+          }
+        }
+      },
+      "linux" : {
+        "aarch64" : {
+          "Standard" : {
+            "sha256" : "3cc309627ad2a9515ca50cdeff9eff118f14326b37eaa536b758570082aeb242",
+            "name" : "Alibaba_Dragonwell_Standard_21.0.3.0.3.9_aarch64_linux.tar.gz",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.3.0.3%2B9_jdk-21.0.3-ga/Alibaba_Dragonwell_Standard_21.0.3.0.3.9_aarch64_linux.tar.gz"
+          }
+        },
+        "x64" : {
+          "Standard" : {
+            "sha256" : "1c0508db048c0b50e2d61b2cc5a5390d3b9bcafec6e185d2cb53dde1fc530203",
+            "name" : "Alibaba_Dragonwell_Standard_21.0.3.0.3.9_x64_linux.tar.gz",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.3.0.3%2B9_jdk-21.0.3-ga/Alibaba_Dragonwell_Standard_21.0.3.0.3.9_x64_linux.tar.gz"
+          }
+        },
+        "riscv" : {
+          "Standard" : {
+            "sha256" : "e374698f8ee9c66b8d4a59ba50d0511aa654b55514732bc787e29c9afaddf846",
+            "name" : "Alibaba_Dragonwell_Standard_21.0.3.0.3.9_riscv64_linux.tar.gz",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.3.0.3%2B9_jdk-21.0.3-ga/Alibaba_Dragonwell_Standard_21.0.3.0.3.9_riscv64_linux.tar.gz"
+          }
+        }
+      },
+      "windows" : {
+        "x64" : {
+          "Standard" : {
+            "sha256" : "0b75fc888cb2a9c7e050132fd020c30cbe65f3179feb36812a7c6be3c76ad277",
+            "name" : "Alibaba_Dragonwell_Standard_21.0.3.0.3.9_x64_windows.zip",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.3.0.3%2B9_jdk-21.0.3-ga/Alibaba_Dragonwell_Standard_21.0.3.0.3.9_x64_windows.zip"
+          }
+        }
+      }
+    },
+    "21.0.2.0.2.13" : {
+      "alpine-linux" : {
+        "x64" : {
+          "Standard" : {
+            "sha256" : "71a391987fdd569385c0afe1aaf16dbd48d127e14306793ef9ac0e0986b9632c",
+            "name" : "Alibaba_Dragonwell_Standard_21.0.2.0.2.13_x64_alpine-linux.tar.gz",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.2.0.2%2B13_jdk-21.0.2-ga/Alibaba_Dragonwell_Standard_21.0.2.0.2.13_x64_alpine-linux.tar.gz"
+          }
+        }
+      },
+      "linux" : {
+        "aarch64" : {
+          "Standard" : {
+            "sha256" : "307321a399c206f8d56e0ce5c65921f9448ec9882dfb81ffc5e841b8fb5f8ed8",
+            "name" : "Alibaba_Dragonwell_Standard_21.0.2.0.2.13_aarch64_linux.tar.gz",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.2.0.2%2B13_jdk-21.0.2-ga/Alibaba_Dragonwell_Standard_21.0.2.0.2.13_aarch64_linux.tar.gz"
+          }
+        },
+        "x64" : {
+          "Standard" : {
+            "sha256" : "24198f0d436bb913b152181e07205647b05da01c196f5c10a96e9a998b10381a",
+            "name" : "Alibaba_Dragonwell_Standard_21.0.2.0.2.13_x64_linux.tar.gz",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.2.0.2%2B13_jdk-21.0.2-ga/Alibaba_Dragonwell_Standard_21.0.2.0.2.13_x64_linux.tar.gz"
+          }
+        },
+        "riscv" : {
+          "Standard" : {
+            "sha256" : "970a49103b8971952e46c81be844bc3776caca04da8456337f12e3a7d2a18011",
+            "name" : "Alibaba_Dragonwell_Standard_21.0.2.0.2.13_riscv64_linux.tar.gz",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.2.0.2%2B13_jdk-21.0.2-ga/Alibaba_Dragonwell_Standard_21.0.2.0.2.13_riscv64_linux.tar.gz"
+          }
+        }
+      },
+      "windows" : {
+        "x64" : {
+          "Standard" : {
+            "sha256" : "b77de54be5ef1595fc568f6f18fbd4b61d64d99a0c9c5ef78a84018b4f82032b",
+            "name" : "Alibaba_Dragonwell_Standard_21.0.2.0.2.13_x64_windows.zip",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.2.0.2%2B13_jdk-21.0.2-ga/Alibaba_Dragonwell_Standard_21.0.2.0.2.13_x64_windows.zip"
+          }
+        }
+      }
+    },
+    "21.0.1.0.1.12" : {
+      "alpine-linux" : {
+        "x64" : {
+          "Standard" : {
+            "sha256" : "b9cea58bffe555484b831ff6d7cdb277c07e86a76d32b373ec35fa21ecb5fdc9",
+            "name" : "Alibaba_Dragonwell_Standard_21.0.1.0.1.12_x64_alpine-linux.tar.gz",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.1.0.1%2B12_jdk-21.0.1-ga/Alibaba_Dragonwell_Standard_21.0.1.0.1.12_x64_alpine-linux.tar.gz"
+          }
+        }
+      },
+      "linux" : {
+        "aarch64" : {
+          "Standard" : {
+            "sha256" : "d36cef494ccc1939c6b5da04133cfdbe0b03956fd04147aef46014536bc5a37b",
+            "name" : "Alibaba_Dragonwell_Standard_21.0.1.0.1.12_aarch64_linux.tar.gz",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.1.0.1%2B12_jdk-21.0.1-ga/Alibaba_Dragonwell_Standard_21.0.1.0.1.12_aarch64_linux.tar.gz"
+          }
+        },
+        "x64" : {
+          "Standard" : {
+            "sha256" : "dfb8d325a98b8f577d72fd639cc54feee325eec8ebba497868184c8405a1cf41",
+            "name" : "Alibaba_Dragonwell_Standard_21.0.1.0.1.12_x64_linux.tar.gz",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.1.0.1%2B12_jdk-21.0.1-ga/Alibaba_Dragonwell_Standard_21.0.1.0.1.12_x64_linux.tar.gz"
+          }
+        }
+      },
+      "windows" : {
+        "x64" : {
+          "Standard" : {
+            "sha256" : "b8ab99ed9060341f75edb8cc238830fbfd608e51536e43f34bd45c3e968ebab5",
+            "name" : "Alibaba_Dragonwell_Standard_21.0.1.0.1.12_x64_windows.zip",
+            "content_type" : "application/zip",
+            "download_url" : "https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.1.0.1%2B12_jdk-21.0.1-ga/Alibaba_Dragonwell_Standard_21.0.1.0.1.12_x64_windows.zip"
+          }
+        }
+      }
+    }
   }
 }

__tests__/distributors/dragonwell-installer.test.ts

@@ -41,15 +41,16 @@ describe('getAvailableVersions', () => {
   describe('getAvailableVersions', () => {
     it.each([
       ['8', 'x86', 'linux', 0],
-      ['8', 'aarch64', 'linux', 24],
+      ['8', 'aarch64', 'linux', 28],
-      ['8.6.6', 'x64', 'linux', 27],
+      ['8.6.6', 'x64', 'linux', 31],
       ['8', 'x86', 'anolis', 0],
       ['8', 'x86', 'windows', 0],
       ['8', 'x86', 'mac', 0],
-      ['11', 'x64', 'linux', 27],
+      ['11', 'x64', 'linux', 31],
-      ['11', 'aarch64', 'linux', 24],
+      ['11', 'aarch64', 'linux', 28],
-      ['17', 'riscv', 'linux', 0],
+      ['17', 'riscv', 'linux', 3],
-      ['16.0.1', 'x64', 'linux', 27]
+      ['16.0.1', 'x64', 'linux', 31],
+      ['21', 'x64', 'linux', 31]
     ])(
       'should get right number of available versions from JSON',
       async (
@@ -103,25 +104,31 @@ describe('getAvailableVersions', () => {
         '11',
         'linux',
         'x64',
-        'https://github.com/alibaba/dragonwell11/releases/download/dragonwell-extended-11.0.17.13_jdk-11.0.17-ga/Alibaba_Dragonwell_Extended_11.0.17.13.8_x64_linux.tar.gz'
+        'https://github.com/dragonwell-project/dragonwell11/releases/download/dragonwell-extended-11.0.23.20_jdk-11.0.23-ga/Alibaba_Dragonwell_Extended_11.0.23.20.9_x64_linux.tar.gz'
       ],
       [
         '11',
         'linux',
         'aarch64',
-        'https://github.com/alibaba/dragonwell11/releases/download/dragonwell-extended-11.0.17.13_jdk-11.0.17-ga/Alibaba_Dragonwell_Extended_11.0.17.13.8_aarch64_linux.tar.gz'
+        'https://github.com/dragonwell-project/dragonwell11/releases/download/dragonwell-extended-11.0.23.20_jdk-11.0.23-ga/Alibaba_Dragonwell_Extended_11.0.23.20.9_aarch64_linux.tar.gz'
+      ],
+      [
+        '11',
+        'linux',
+        'riscv',
+        'https://github.com/dragonwell-project/dragonwell11/releases/download/dragonwell-extended-11.0.23.20_jdk-11.0.23-ga/Alibaba_Dragonwell_Extended_11.0.23.20.9_riscv64_linux.tar.gz'
       ],
       [
         '11',
         'windows',
         'x64',
-        'https://github.com/alibaba/dragonwell11/releases/download/dragonwell-extended-11.0.17.13_jdk-11.0.17-ga/Alibaba_Dragonwell_Extended_11.0.17.13.8_x64_windows.zip'
+        'https://github.com/dragonwell-project/dragonwell11/releases/download/dragonwell-extended-11.0.23.20_jdk-11.0.23-ga/Alibaba_Dragonwell_Extended_11.0.23.20.9_x64_windows.zip'
       ],
       [
         '11',
         'alpine-linux',
         'x64',
-        'https://github.com/alibaba/dragonwell11/releases/download/dragonwell-extended-11.0.17.13_jdk-11.0.17-ga/Alibaba_Dragonwell_Extended_11.0.17.13.8_x64_alpine-linux.tar.gz'
+        'https://github.com/dragonwell-project/dragonwell11/releases/download/dragonwell-extended-11.0.23.20_jdk-11.0.23-ga/Alibaba_Dragonwell_Extended_11.0.23.20.9_x64_alpine-linux.tar.gz'
       ],
       [
         '11.0.17',
@@ -158,6 +165,30 @@ describe('getAvailableVersions', () => {
         'linux',
         'x64',
         'https://github.com/alibaba/dragonwell17/releases/download/dragonwell-standard-17.0.4.0.4%2B8_jdk-17.0.4-ga/Alibaba_Dragonwell_Standard_17.0.4.0.4%2B8_x64_linux.tar.gz'
+      ],
+      [
+        '17.0.4+8',
+        'linux',
+        'x64',
+        'https://github.com/alibaba/dragonwell17/releases/download/dragonwell-standard-17.0.4.0.4%2B8_jdk-17.0.4-ga/Alibaba_Dragonwell_Standard_17.0.4.0.4%2B8_x64_linux.tar.gz'
+      ],
+      [
+        '21',
+        'linux',
+        'aarch64',
+        'https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.3.0.3%2B9_jdk-21.0.3-ga/Alibaba_Dragonwell_Standard_21.0.3.0.3.9_aarch64_linux.tar.gz'
+      ],
+      [
+        '21.0.3+9',
+        'linux',
+        'riscv',
+        'https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.3.0.3%2B9_jdk-21.0.3-ga/Alibaba_Dragonwell_Standard_21.0.3.0.3.9_riscv64_linux.tar.gz'
+      ],
+      [
+        '21.0.1+12',
+        'linux',
+        'x64',
+        'https://github.com/dragonwell-project/dragonwell21/releases/download/dragonwell-standard-21.0.1.0.1%2B12_jdk-21.0.1-ga/Alibaba_Dragonwell_Standard_21.0.1.0.1.12_x64_linux.tar.gz'
       ]
     ])(
       'should return proper link according to the specified java-version, platform and arch',

__tests__/toolchains.test.ts

@@ -143,7 +143,20 @@ describe('toolchains tests', () => {
         </toolchain>
       </toolchains>`;
     const result = `<?xml version="1.0"?>
-<toolchains>
+<toolchains xmlns="http://maven.apache.org/TOOLCHAINS/1.1.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/TOOLCHAINS/1.1.0 https://maven.apache.org/xsd/toolchains-1.1.0.xsd">
+  <toolchain>
+    <type>jdk</type>
+    <provides>
+      <version>17</version>
+      <vendor>Eclipse Temurin</vendor>
+      <id>temurin_17</id>
+    </provides>
+    <configuration>
+      <jdkHome>/opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.1-12/x64</jdkHome>
+    </configuration>
+  </toolchain>
   <toolchain>
     <type>jdk</type>
     <provides>
@@ -155,6 +168,442 @@ describe('toolchains tests', () => {
       <jdkHome>/opt/jdk/sun/1.6</jdkHome>
     </configuration>
   </toolchain>
+</toolchains>`;
+
+    fs.mkdirSync(m2Dir, {recursive: true});
+    fs.writeFileSync(toolchainsFile, originalFile);
+    expect(fs.existsSync(m2Dir)).toBe(true);
+    expect(fs.existsSync(toolchainsFile)).toBe(true);
+
+    await toolchains.createToolchainsSettings({
+      jdkInfo,
+      settingsDirectory: m2Dir,
+      overwriteSettings: true
+    });
+
+    expect(fs.existsSync(m2Dir)).toBe(true);
+    expect(fs.existsSync(toolchainsFile)).toBe(true);
+    expect(fs.readFileSync(toolchainsFile, 'utf-8')).toEqual(
+      toolchains.generateToolchainDefinition(
+        originalFile,
+        jdkInfo.version,
+        jdkInfo.vendor,
+        jdkInfo.id,
+        jdkInfo.jdkHome
+      )
+    );
+    expect(
+      toolchains.generateToolchainDefinition(
+        originalFile,
+        jdkInfo.version,
+        jdkInfo.vendor,
+        jdkInfo.id,
+        jdkInfo.jdkHome
+      )
+    ).toEqual(result);
+  }, 100000);
+
+  it('does not discard custom elements in existing toolchain definitions', async () => {
+    const jdkInfo = {
+      version: '17',
+      vendor: 'Eclipse Temurin',
+      id: 'temurin_17',
+      jdkHome: '/opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.1-12/x64'
+    };
+
+    const originalFile = `<toolchains>
+        <toolchain>
+          <type>jdk</type>
+          <provides>
+            <version>1.6</version>
+            <vendor>Sun</vendor>
+            <id>sun_1.6</id>
+            <custom>foo</custom>
+          </provides>
+          <configuration>
+            <jdkHome>/opt/jdk/sun/1.6</jdkHome>
+            <fooHome>/usr/local/bin/bash</fooHome>
+          </configuration>
+        </toolchain>
+      </toolchains>`;
+    const result = `<?xml version="1.0"?>
+<toolchains xmlns="http://maven.apache.org/TOOLCHAINS/1.1.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/TOOLCHAINS/1.1.0 https://maven.apache.org/xsd/toolchains-1.1.0.xsd">
+  <toolchain>
+    <type>jdk</type>
+    <provides>
+      <version>17</version>
+      <vendor>Eclipse Temurin</vendor>
+      <id>temurin_17</id>
+    </provides>
+    <configuration>
+      <jdkHome>/opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.1-12/x64</jdkHome>
+    </configuration>
+  </toolchain>
+  <toolchain>
+    <type>jdk</type>
+    <provides>
+      <version>1.6</version>
+      <vendor>Sun</vendor>
+      <id>sun_1.6</id>
+      <custom>foo</custom>
+    </provides>
+    <configuration>
+      <jdkHome>/opt/jdk/sun/1.6</jdkHome>
+      <fooHome>/usr/local/bin/bash</fooHome>
+    </configuration>
+  </toolchain>
+</toolchains>`;
+
+    fs.mkdirSync(m2Dir, {recursive: true});
+    fs.writeFileSync(toolchainsFile, originalFile);
+    expect(fs.existsSync(m2Dir)).toBe(true);
+    expect(fs.existsSync(toolchainsFile)).toBe(true);
+
+    await toolchains.createToolchainsSettings({
+      jdkInfo,
+      settingsDirectory: m2Dir,
+      overwriteSettings: true
+    });
+
+    expect(fs.existsSync(m2Dir)).toBe(true);
+    expect(fs.existsSync(toolchainsFile)).toBe(true);
+    expect(fs.readFileSync(toolchainsFile, 'utf-8')).toEqual(
+      toolchains.generateToolchainDefinition(
+        originalFile,
+        jdkInfo.version,
+        jdkInfo.vendor,
+        jdkInfo.id,
+        jdkInfo.jdkHome
+      )
+    );
+    expect(
+      toolchains.generateToolchainDefinition(
+        originalFile,
+        jdkInfo.version,
+        jdkInfo.vendor,
+        jdkInfo.id,
+        jdkInfo.jdkHome
+      )
+    ).toEqual(result);
+  }, 100000);
+
+  it('does not discard existing, custom toolchain definitions', async () => {
+    const jdkInfo = {
+      version: '17',
+      vendor: 'Eclipse Temurin',
+      id: 'temurin_17',
+      jdkHome: '/opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.1-12/x64'
+    };
+
+    const originalFile = `<toolchains>
+        <toolchain>
+            <type>foo</type>
+            <provides>
+                <custom>baz</custom>
+            </provides>
+            <configuration>
+                <fooHome>/usr/local/bin/foo</fooHome>
+            </configuration>
+        </toolchain>
+      </toolchains>`;
+    const result = `<?xml version="1.0"?>
+<toolchains xmlns="http://maven.apache.org/TOOLCHAINS/1.1.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/TOOLCHAINS/1.1.0 https://maven.apache.org/xsd/toolchains-1.1.0.xsd">
+  <toolchain>
+    <type>jdk</type>
+    <provides>
+      <version>17</version>
+      <vendor>Eclipse Temurin</vendor>
+      <id>temurin_17</id>
+    </provides>
+    <configuration>
+      <jdkHome>/opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.1-12/x64</jdkHome>
+    </configuration>
+  </toolchain>
+  <toolchain>
+    <type>foo</type>
+    <provides>
+      <custom>baz</custom>
+    </provides>
+    <configuration>
+      <fooHome>/usr/local/bin/foo</fooHome>
+    </configuration>
+  </toolchain>
+</toolchains>`;
+
+    fs.mkdirSync(m2Dir, {recursive: true});
+    fs.writeFileSync(toolchainsFile, originalFile);
+    expect(fs.existsSync(m2Dir)).toBe(true);
+    expect(fs.existsSync(toolchainsFile)).toBe(true);
+
+    await toolchains.createToolchainsSettings({
+      jdkInfo,
+      settingsDirectory: m2Dir,
+      overwriteSettings: true
+    });
+
+    expect(fs.existsSync(m2Dir)).toBe(true);
+    expect(fs.existsSync(toolchainsFile)).toBe(true);
+    expect(fs.readFileSync(toolchainsFile, 'utf-8')).toEqual(
+      toolchains.generateToolchainDefinition(
+        originalFile,
+        jdkInfo.version,
+        jdkInfo.vendor,
+        jdkInfo.id,
+        jdkInfo.jdkHome
+      )
+    );
+    expect(
+      toolchains.generateToolchainDefinition(
+        originalFile,
+        jdkInfo.version,
+        jdkInfo.vendor,
+        jdkInfo.id,
+        jdkInfo.jdkHome
+      )
+    ).toEqual(result);
+  }, 100000);
+
+  it('does not duplicate existing toolchain definitions', async () => {
+    const jdkInfo = {
+      version: '17',
+      vendor: 'Eclipse Temurin',
+      id: 'temurin_17',
+      jdkHome: '/opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.1-12/x64'
+    };
+
+    const originalFile = `<toolchains>
+      <toolchain>
+        <type>jdk</type>
+        <provides>
+          <version>17</version>
+          <vendor>Eclipse Temurin</vendor>
+          <id>temurin_17</id>
+        </provides>
+        <configuration>
+          <jdkHome>/opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.1-12/x64</jdkHome>
+        </configuration>
+      </toolchain>
+      </toolchains>`;
+    const result = `<?xml version="1.0"?>
+<toolchains xmlns="http://maven.apache.org/TOOLCHAINS/1.1.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/TOOLCHAINS/1.1.0 https://maven.apache.org/xsd/toolchains-1.1.0.xsd">
+  <toolchain>
+    <type>jdk</type>
+    <provides>
+      <version>17</version>
+      <vendor>Eclipse Temurin</vendor>
+      <id>temurin_17</id>
+    </provides>
+    <configuration>
+      <jdkHome>/opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.1-12/x64</jdkHome>
+    </configuration>
+  </toolchain>
+</toolchains>`;
+
+    fs.mkdirSync(m2Dir, {recursive: true});
+    fs.writeFileSync(toolchainsFile, originalFile);
+    expect(fs.existsSync(m2Dir)).toBe(true);
+    expect(fs.existsSync(toolchainsFile)).toBe(true);
+
+    await toolchains.createToolchainsSettings({
+      jdkInfo,
+      settingsDirectory: m2Dir,
+      overwriteSettings: true
+    });
+
+    expect(fs.existsSync(m2Dir)).toBe(true);
+    expect(fs.existsSync(toolchainsFile)).toBe(true);
+    expect(fs.readFileSync(toolchainsFile, 'utf-8')).toEqual(
+      toolchains.generateToolchainDefinition(
+        originalFile,
+        jdkInfo.version,
+        jdkInfo.vendor,
+        jdkInfo.id,
+        jdkInfo.jdkHome
+      )
+    );
+    expect(
+      toolchains.generateToolchainDefinition(
+        originalFile,
+        jdkInfo.version,
+        jdkInfo.vendor,
+        jdkInfo.id,
+        jdkInfo.jdkHome
+      )
+    ).toEqual(result);
+  }, 100000);
+
+  it('does not duplicate existing toolchain definitions if multiple exist', async () => {
+    const jdkInfo = {
+      version: '17',
+      vendor: 'Eclipse Temurin',
+      id: 'temurin_17',
+      jdkHome: '/opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.1-12/x64'
+    };
+
+    const originalFile = `<toolchains>
+        <toolchain>
+          <type>jdk</type>
+          <provides>
+            <version>1.6</version>
+            <vendor>Sun</vendor>
+            <id>sun_1.6</id>
+          </provides>
+          <configuration>
+            <jdkHome>/opt/jdk/sun/1.6</jdkHome>
+          </configuration>
+        </toolchain>
+      <toolchain>
+        <type>jdk</type>
+        <provides>
+          <version>17</version>
+          <vendor>Eclipse Temurin</vendor>
+          <id>temurin_17</id>
+        </provides>
+        <configuration>
+          <jdkHome>/opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.1-12/x64</jdkHome>
+        </configuration>
+      </toolchain>
+      </toolchains>`;
+    const result = `<?xml version="1.0"?>
+<toolchains xmlns="http://maven.apache.org/TOOLCHAINS/1.1.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/TOOLCHAINS/1.1.0 https://maven.apache.org/xsd/toolchains-1.1.0.xsd">
+  <toolchain>
+    <type>jdk</type>
+    <provides>
+      <version>17</version>
+      <vendor>Eclipse Temurin</vendor>
+      <id>temurin_17</id>
+    </provides>
+    <configuration>
+      <jdkHome>/opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.1-12/x64</jdkHome>
+    </configuration>
+  </toolchain>
+  <toolchain>
+    <type>jdk</type>
+    <provides>
+      <version>1.6</version>
+      <vendor>Sun</vendor>
+      <id>sun_1.6</id>
+    </provides>
+    <configuration>
+      <jdkHome>/opt/jdk/sun/1.6</jdkHome>
+    </configuration>
+  </toolchain>
+</toolchains>`;
+
+    fs.mkdirSync(m2Dir, {recursive: true});
+    fs.writeFileSync(toolchainsFile, originalFile);
+    expect(fs.existsSync(m2Dir)).toBe(true);
+    expect(fs.existsSync(toolchainsFile)).toBe(true);
+
+    await toolchains.createToolchainsSettings({
+      jdkInfo,
+      settingsDirectory: m2Dir,
+      overwriteSettings: true
+    });
+
+    expect(fs.existsSync(m2Dir)).toBe(true);
+    expect(fs.existsSync(toolchainsFile)).toBe(true);
+    expect(fs.readFileSync(toolchainsFile, 'utf-8')).toEqual(
+      toolchains.generateToolchainDefinition(
+        originalFile,
+        jdkInfo.version,
+        jdkInfo.vendor,
+        jdkInfo.id,
+        jdkInfo.jdkHome
+      )
+    );
+    expect(
+      toolchains.generateToolchainDefinition(
+        originalFile,
+        jdkInfo.version,
+        jdkInfo.vendor,
+        jdkInfo.id,
+        jdkInfo.jdkHome
+      )
+    ).toEqual(result);
+  }, 100000);
+
+  it('handles an empty list of existing toolchains correctly', async () => {
+    const jdkInfo = {
+      version: '17',
+      vendor: 'Eclipse Temurin',
+      id: 'temurin_17',
+      jdkHome: '/opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.1-12/x64'
+    };
+
+    const originalFile = `<toolchains>
+      </toolchains>`;
+    const result = `<?xml version="1.0"?>
+<toolchains xmlns="http://maven.apache.org/TOOLCHAINS/1.1.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/TOOLCHAINS/1.1.0 https://maven.apache.org/xsd/toolchains-1.1.0.xsd">
+  <toolchain>
+    <type>jdk</type>
+    <provides>
+      <version>17</version>
+      <vendor>Eclipse Temurin</vendor>
+      <id>temurin_17</id>
+    </provides>
+    <configuration>
+      <jdkHome>/opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.1-12/x64</jdkHome>
+    </configuration>
+  </toolchain>
+</toolchains>`;
+
+    fs.mkdirSync(m2Dir, {recursive: true});
+    fs.writeFileSync(toolchainsFile, originalFile);
+    expect(fs.existsSync(m2Dir)).toBe(true);
+    expect(fs.existsSync(toolchainsFile)).toBe(true);
+
+    await toolchains.createToolchainsSettings({
+      jdkInfo,
+      settingsDirectory: m2Dir,
+      overwriteSettings: true
+    });
+
+    expect(fs.existsSync(m2Dir)).toBe(true);
+    expect(fs.existsSync(toolchainsFile)).toBe(true);
+    expect(fs.readFileSync(toolchainsFile, 'utf-8')).toEqual(
+      toolchains.generateToolchainDefinition(
+        originalFile,
+        jdkInfo.version,
+        jdkInfo.vendor,
+        jdkInfo.id,
+        jdkInfo.jdkHome
+      )
+    );
+    expect(
+      toolchains.generateToolchainDefinition(
+        originalFile,
+        jdkInfo.version,
+        jdkInfo.vendor,
+        jdkInfo.id,
+        jdkInfo.jdkHome
+      )
+    ).toEqual(result);
+  }, 100000);
+
+  it('handles an empty existing toolchains.xml correctly', async () => {
+    const jdkInfo = {
+      version: '17',
+      vendor: 'Eclipse Temurin',
+      id: 'temurin_17',
+      jdkHome: '/opt/hostedtoolcache/Java_Temurin-Hotspot_jdk/17.0.1-12/x64'
+    };
+
+    const originalFile = ``;
+    const result = `<?xml version="1.0"?>
+<toolchains xmlns="http://maven.apache.org/TOOLCHAINS/1.1.0"
+  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+  xsi:schemaLocation="http://maven.apache.org/TOOLCHAINS/1.1.0 https://maven.apache.org/xsd/toolchains-1.1.0.xsd">
   <toolchain>
     <type>jdk</type>
     <provides>

dist/setup/index.js

@@ -124231,9 +124231,10 @@ class DragonwellDistribution extends base_installer_1.JavaBase {
                 }
                 // Some version of Dragonwell JDK are numerated with help of non-semver notation (more then 3 digits).
                 // Common practice is to transform excess digits to the so-called semver build part, which is prefixed with the plus sign, to be able to operate with them using semver tools.
-                if (jdkVersion.split('.').length > 3) {
+                const jdkVersionNums = jdkVersion
-                    jdkVersion = (0, util_1.convertVersionToSemver)(jdkVersion);
+                    .replace('+', '.')
-                }
+                    .split('.');
+                jdkVersion = (0, util_1.convertVersionToSemver)(`${jdkVersionNums.slice(0, 3).join('.')}.${jdkVersionNums[jdkVersionNums.length - 1]}`);
                 for (const edition in archMap) {
                     eligibleVersions.push({
                         os: platform,
@@ -125719,31 +125720,7 @@ function createToolchainsSettings({ jdkInfo, settingsDirectory, overwriteSetting
 exports.createToolchainsSettings = createToolchainsSettings;
 // only exported for testing purposes
 function generateToolchainDefinition(original, version, vendor, id, jdkHome) {
-    let xmlObj;
+    let jsToolchains = [
-    if (original === null || original === void 0 ? void 0 : original.length) {
-        xmlObj = (0, xmlbuilder2_1.create)(original)
-            .root()
-            .ele({
-            toolchain: {
-                type: 'jdk',
-                provides: {
-                    version: `${version}`,
-                    vendor: `${vendor}`,
-                    id: `${id}`
-                },
-                configuration: {
-                    jdkHome: `${jdkHome}`
-                }
-            }
-        });
-    }
-    else
-        xmlObj = (0, xmlbuilder2_1.create)({
-            toolchains: {
-                '@xmlns': 'http://maven.apache.org/TOOLCHAINS/1.1.0',
-                '@xmlns:xsi': 'http://www.w3.org/2001/XMLSchema-instance',
-                '@xsi:schemaLocation': 'http://maven.apache.org/TOOLCHAINS/1.1.0 https://maven.apache.org/xsd/toolchains-1.1.0.xsd',
-                toolchain: [
         {
             type: 'jdk',
             provides: {
@@ -125755,10 +125732,41 @@ function generateToolchainDefinition(original, version, vendor, id, jdkHome) {
                 jdkHome: `${jdkHome}`
             }
         }
-                ]
+    ];
+    if (original === null || original === void 0 ? void 0 : original.length) {
+        // convert existing toolchains into TS native objects for better handling
+        // xmlbuilder2 will convert the document into a `{toolchains: { toolchain: [] | {} }}` structure
+        // instead of the desired `toolchains: [{}]` one or simply `[{}]`
+        const jsObj = (0, xmlbuilder2_1.create)(original)
+            .root()
+            .toObject();
+        if (jsObj.toolchains && jsObj.toolchains.toolchain) {
+            // in case only a single child exists xmlbuilder2 will not create an array and using verbose = true equally doesn't work here
+            // See https://oozcitak.github.io/xmlbuilder2/serialization.html#js-object-and-map-serializers for details
+            if (Array.isArray(jsObj.toolchains.toolchain)) {
+                jsToolchains.push(...jsObj.toolchains.toolchain);
             }
-        });
+            else {
-    return xmlObj.end({
+                jsToolchains.push(jsObj.toolchains.toolchain);
+            }
+        }
+        // remove potential duplicates based on type & id (which should be a unique combination);
+        // self.findIndex will only return the first occurrence, ensuring duplicates are skipped
+        jsToolchains = jsToolchains.filter((value, index, self) => 
+        // ensure non-jdk toolchains are kept in the results, we must not touch them because they belong to the user
+        value.type !== 'jdk' ||
+            index ===
+                self.findIndex(t => t.type === value.type && t.provides.id === value.provides.id));
+    }
+    // TODO: technically bad because we shouldn't re-create the toolchains root node (with possibly different schema values) if it already exists, however, just overriding the toolchain array with xmlbuilder2 is … uh non-trivial
+    return (0, xmlbuilder2_1.create)({
+        toolchains: {
+            '@xmlns': 'http://maven.apache.org/TOOLCHAINS/1.1.0',
+            '@xmlns:xsi': 'http://www.w3.org/2001/XMLSchema-instance',
+            '@xsi:schemaLocation': 'http://maven.apache.org/TOOLCHAINS/1.1.0 https://maven.apache.org/xsd/toolchains-1.1.0.xsd',
+            toolchain: jsToolchains
+        }
+    }).end({
         format: 'xml',
         wellFormed: false,
         headless: false,

src/distributions/dragonwell/installer.ts

@@ -149,9 +149,14 @@ export class DragonwellDistribution extends JavaBase {
 
         // Some version of Dragonwell JDK are numerated with help of non-semver notation (more then 3 digits).
         // Common practice is to transform excess digits to the so-called semver build part, which is prefixed with the plus sign, to be able to operate with them using semver tools.
-        if (jdkVersion.split('.').length > 3) {
+        const jdkVersionNums: string[] = jdkVersion
-          jdkVersion = convertVersionToSemver(jdkVersion);
+          .replace('+', '.')
-        }
+          .split('.');
+        jdkVersion = convertVersionToSemver(
+          `${jdkVersionNums.slice(0, 3).join('.')}.${
+            jdkVersionNums[jdkVersionNums.length - 1]
+          }`
+        );
 
         for (const edition in archMap) {
           eligibleVersions.push({

src/toolchains.ts

@@ -84,31 +84,7 @@ export function generateToolchainDefinition(
   id: string,
   jdkHome: string
 ) {
-  let xmlObj;
+  let jsToolchains: Toolchain[] = [
-  if (original?.length) {
-    xmlObj = xmlCreate(original)
-      .root()
-      .ele({
-        toolchain: {
-          type: 'jdk',
-          provides: {
-            version: `${version}`,
-            vendor: `${vendor}`,
-            id: `${id}`
-          },
-          configuration: {
-            jdkHome: `${jdkHome}`
-          }
-        }
-      });
-  } else
-    xmlObj = xmlCreate({
-      toolchains: {
-        '@xmlns': 'http://maven.apache.org/TOOLCHAINS/1.1.0',
-        '@xmlns:xsi': 'http://www.w3.org/2001/XMLSchema-instance',
-        '@xsi:schemaLocation':
-          'http://maven.apache.org/TOOLCHAINS/1.1.0 https://maven.apache.org/xsd/toolchains-1.1.0.xsd',
-        toolchain: [
     {
       type: 'jdk',
       provides: {
@@ -120,11 +96,47 @@ export function generateToolchainDefinition(
         jdkHome: `${jdkHome}`
       }
     }
-        ]
+  ];
+  if (original?.length) {
+    // convert existing toolchains into TS native objects for better handling
+    // xmlbuilder2 will convert the document into a `{toolchains: { toolchain: [] | {} }}` structure
+    // instead of the desired `toolchains: [{}]` one or simply `[{}]`
+    const jsObj = xmlCreate(original)
+      .root()
+      .toObject() as unknown as ExtractedToolchains;
+    if (jsObj.toolchains && jsObj.toolchains.toolchain) {
+      // in case only a single child exists xmlbuilder2 will not create an array and using verbose = true equally doesn't work here
+      // See https://oozcitak.github.io/xmlbuilder2/serialization.html#js-object-and-map-serializers for details
+      if (Array.isArray(jsObj.toolchains.toolchain)) {
+        jsToolchains.push(...jsObj.toolchains.toolchain);
+      } else {
+        jsToolchains.push(jsObj.toolchains.toolchain);
+      }
     }
-    });
 
-  return xmlObj.end({
+    // remove potential duplicates based on type & id (which should be a unique combination);
+    // self.findIndex will only return the first occurrence, ensuring duplicates are skipped
+    jsToolchains = jsToolchains.filter(
+      (value, index, self) =>
+        // ensure non-jdk toolchains are kept in the results, we must not touch them because they belong to the user
+        value.type !== 'jdk' ||
+        index ===
+          self.findIndex(
+            t => t.type === value.type && t.provides.id === value.provides.id
+          )
+    );
+  }
+
+  // TODO: technically bad because we shouldn't re-create the toolchains root node (with possibly different schema values) if it already exists, however, just overriding the toolchain array with xmlbuilder2 is … uh non-trivial
+  return xmlCreate({
+    toolchains: {
+      '@xmlns': 'http://maven.apache.org/TOOLCHAINS/1.1.0',
+      '@xmlns:xsi': 'http://www.w3.org/2001/XMLSchema-instance',
+      '@xsi:schemaLocation':
+        'http://maven.apache.org/TOOLCHAINS/1.1.0 https://maven.apache.org/xsd/toolchains-1.1.0.xsd',
+      toolchain: jsToolchains
+    }
+  }).end({
     format: 'xml',
     wellFormed: false,
     headless: false,
@@ -167,3 +179,22 @@ async function writeToolchainsFileToDisk(
     flag: 'w'
   });
 }
+
+interface ExtractedToolchains {
+  toolchains: {
+    toolchain: Toolchain[] | Toolchain;
+  };
+}
+
+// Toolchain type definition according to Maven Toolchains XSD 1.1.0
+interface Toolchain {
+  type: string;
+  provides:
+    | {
+        version: string;
+        vendor: string;
+        id: string;
+      }
+    | any;
+  configuration: any;
+}