Add DockerVersion

Author: raydouglass

src/main/java/com/gpuopenanalytics/jenkins/remotedocker/DockerVersion.java

@@ -0,0 +1,94 @@
+/*
+ * The MIT License
+ *
+ * Copyright (c) 2020, NVIDIA CORPORATION.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+package com.gpuopenanalytics.jenkins.remotedocker;
+
+import java.io.Serializable;
+
+public class DockerVersion implements Serializable {
+
+    private int major;
+    private int minor;
+    private int patch;
+    private String extra;
+    private String build;
+
+    private DockerVersion(int major,
+                          int minor,
+                          int patch,
+                          String extra,
+                          String build) {
+        this.major = major;
+        this.minor = minor;
+        this.patch = patch;
+        this.extra = extra;
+        this.build = build;
+    }
+
+    /**
+     * Parse from output of <code>docker --version</code> such as <code>Docker
+     * version 19.03.5, build 633a0ea</code>
+     *
+     * @return
+     */
+    public static DockerVersion fromVersionString(String versionString) {
+        String[] split = versionString.split("\\s");
+        String build = split[split.length - 1];
+        String[] version = split[2].substring(0, split[2].length() - 1).split(
+                "\\.");
+        int major = Integer.parseInt(version[0]);
+        int minor = Integer.parseInt(version[1]);
+        int patch = 0;
+        String extra = null;
+        if (version[2].contains("-")) {
+            patch = Integer.parseInt(
+                    version[2].substring(0, version[2].indexOf('-')));
+            extra = version[2].substring(version[2].indexOf('-') + 1);
+        } else {
+            patch = Integer.parseInt(version[2]);
+        }
+        return new DockerVersion(major, minor, patch, extra, build);
+    }
+
+    public String getVersionString() {
+        return String.format("%02d.%02d.%d", major, minor, patch);
+    }
+
+    public boolean hasGpuFlag() {
+        return "19.03.0".compareTo(getVersionString()) < 0;
+    }
+
+    public String toString() {
+        if (extra != null) {
+            return String.format("Docker version %s-%s, build %s",
+                                 getVersionString(),
+                                 extra,
+                                 build);
+        } else {
+            return String.format("Docker version %s, build %s",
+                                 getVersionString(),
+                                 build);
+        }
+    }
+}