Examples of hudson.EnvVars

hudson.EnvVars
Environment variables.
While all the platforms I tested (Linux 2.6, Solaris, and Windows XP) have the case sensitive environment variable table, Windows batch script handles environment variable in the case preserving but case insensitive way (that is, cmd.exe can get both FOO and foo as environment variables when it's launched, and the "set" command will display it accordingly, but "echo %foo%" results in echoing the value of "FOO", not "foo" — this is presumably caused by the behavior of the underlying Win32 API GetEnvironmentVariable acting in case insensitive way.) Windows users are also used to write environment variable case-insensitively (like %Path% vs %PATH%), and you can see many documents on the web that claims Windows environment variables are case insensitive.
So for a consistent cross platform behavior, it creates the least confusion to make the table case insensitive but case preserving.
In Jenkins, often we need to build up "environment variable overrides" on master, then to execute the process on slaves. This causes a problem when working with variables like PATH. So to make this work, we introduce a special convention PATH+FOO — all entries that starts with PATH+ are merged and prepended to the inherited PATH variable, on the process where a new process is executed. @author Kohsuke Kawaguchi

      this.value = value;
    }
  }
  
  private static EnvVars toMap(List<Entry> entries) {
    EnvVars map = new EnvVars();
        if (entries!=null)
            for (Entry entry: entries)
                map.put(entry.key,entry.value);
    return map;
  }

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            // resolve the relative path against the parent workspace, which needs locking
            FilePath baseDir = baseLease.path;


            // prepare variables that can be used in the child workspace setting
            EnvVars env = getEnvironment(listener);
            env.put("COMBINATION",getParent().getCombination().toString('/','/'));  // e.g., "axis1/a/axis2/b"
            env.put("SHORT_COMBINATION",getParent().getDigestName());               // e.g., "0fbcab35"
            env.put("PARENT_WORKSPACE",baseDir.getRemote());


            // child workspace need no individual locks, whether or not we use custom workspace
            String childWs = mp.getChildCustomWorkspace();
            return Lease.createLinkedDummyLease(baseDir.child(env.expand(childWs)),baseLease);
        }

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    @Override
    public boolean perform(AbstractBuild<?,?> build, Launcher launcher, BuildListener listener) throws IOException, InterruptedException {
        VariableResolver<String> vr = build.getBuildVariableResolver();


        EnvVars env = build.getEnvironment(listener);


        String targets = Util.replaceMacro(this.targets,vr);
        targets = env.expand(targets);
        String pom = env.expand(this.pom);
        String properties = env.expand(this.properties);


        int startIndex = 0;
        int endIndex;
        do {
            // split targets into multiple invokations of maven separated by |

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    // //////////////////////// setup //////////////////////////////////////////


    public void setUp() throws Exception {
        super.setUp();
        EnvVars env = new EnvVars();
        // we don't want Maven, Ant, etc. to be discovered in the path for this test to work,
        // but on Unix these tools rely on other basic Unix tools (like env) for its operation,
        // so empty path breaks the test.
        env.put("PATH", "/bin:/usr/bin");
        env.put("M2_HOME", "empty");
        slave = createSlave(new LabelAtom("slave"), env);
        project = createFreeStyleProject();
        project.setAssignedLabel(slave.getSelfLabel());
    }

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    public void testEnvMavenOptsNoneInProject() throws Exception {
        configureDefaultMaven();
        MavenModuleSet m = createMavenProject();
        m.setScm(new ExtractResourceSCM(getClass().getResource("maven-opts-echo.zip")));
        m.setGoals("validate");
        m.setAssignedLabel(createSlave(new EnvVars("MAVEN_OPTS", "-Dhudson.mavenOpt.test=foo")).getSelfLabel());
        
        buildAndAssertSuccess(m);


        assertLogContains("[hudson.mavenOpt.test=foo]", m.getLastBuild());
    }

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        configureDefaultMaven();
        MavenModuleSet m = createMavenProject();
        m.setScm(new ExtractResourceSCM(getClass().getResource("maven-opts-echo.zip")));
        m.setGoals("validate");
        m.setMavenOpts("-Dhudson.mavenOpt.test=bar");
        m.setAssignedLabel(createSlave(new EnvVars("MAVEN_OPTS", "-Dhudson.mavenOpt.test=foo")).getSelfLabel());
        
        buildAndAssertSuccess(m);


        assertLogContains("[hudson.mavenOpt.test=bar]", m.getLastBuild());
    }

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        configureDefaultMaven();
        MavenModuleSet m = createMavenProject();
        m.setScm(new ExtractResourceSCM(getClass().getResource("maven-opts-echo.zip")));
        m.setGoals("validate");
        MavenModuleSet.DESCRIPTOR.setGlobalMavenOpts("-Dhudson.mavenOpt.test=bar");
        m.setAssignedLabel(createSlave(new EnvVars("MAVEN_OPTS", "-Dhudson.mavenOpt.test=foo")).getSelfLabel());
        m.setMavenOpts("-Dhudson.mavenOpt.test=baz");
        
        buildAndAssertSuccess(m);


        assertLogContains("[hudson.mavenOpt.test=baz]", m.getLastBuild());

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        configureDefaultMaven();
        MavenModuleSet m = createMavenProject();
        m.setMavenOpts("$FOO");
        m.setScm(new ExtractResourceSCM(getClass().getResource("maven-opts-echo.zip")));
        m.setGoals("validate");
        m.setAssignedLabel(createSlave(new EnvVars("FOO", "-Dhudson.mavenOpt.test=foo -Dhudson.mavenOpt.test2=bar")).getSelfLabel());


        buildAndAssertSuccess(m);


        assertLogContains("[hudson.mavenOpt.test=foo]", m.getLastBuild());
    }

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                        return args;
                    }


                    @Override
                    public synchronized EnvVars getEnvironmentVariables() {
                        if(env==null)   env = new EnvVars(p.getEnvironmentVariables());
                        return env;
                    }
                });


            }

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        this.command = command;
    }


    @Override
    public CommandLauncher launch(String host, TaskListener listener) throws IOException, InterruptedException {
        return new CommandLauncher(command,new EnvVars("SLAVE",host));
    }

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