I think I understand now. The documentation for javac says that javac expects source files to live in a package tree, but that does not apply to the source files on the command line.
> On Dec 21, 2023, at 10:07 AM, Alan Snyder <contagiousarrow...@cbfiddle.com> > wrote: > > Thank you for the suggestion. It seems to work. > > I do not understand why my previous snippet worked. If java used srcdir=“.” > as the root of a package tree, > then why did it compile files in a and b as top level classes? (The files in > a and b did not declare a package.) > > Alan > > >> On Dec 20, 2023, at 10:02 PM, ilya Basin <basini...@gmail.com> wrote: >> >> Alan. I never used srcpath before and after some trial and error I feel that >> the source of the problem is bad description of the option in JDK. >> Ant passes srcpath directly to JDK's javac (unlike srcdir which Ant itself >> searches for java files). >> >> The description says "Specify" or "Specifies", but it actually "overrides" >> the default. And the default is current dir ".". >> The other important thing the short description doesn't mention is javac >> won't compile all source files in srcpath, but only those needed by >> explicitly listed source files. >> So by default javac will look in the current dir for source files needed to >> compile explicitly listed source files. >> >> You probably want all sources in "a" and "b" to be compiled so you shouldn't >> use srcpath for them. >> >> Finally, javac does not accept fileset as <src> or srcdir. In your example >> "p" was consisting of java files and it was wasn't failing for you because >> it was used as srcpath and srcpath was never scanned by javac because all >> needed sources were found in srcdir. >> >> Ant docs could be better too. I wasn't able to find examples of <src >> refid=.../> on the site. >> >> Please try my variant: >> >> <?xml version="1.0" encoding="UTF-8"?> >> >> <project name="test" default="t" basedir="."> >> >> <path id="p"> >> <path path="a"/> >> <path path="b"/> >> </path> >> >> <target name="t"> >> <javac> >> <src refid="p"/> >> </javac> >> </target> >> >> </project> >> >> >> >> >> -------- Original Message -------- >> From: Alan Snyder [mailto:contagiousarrow...@cbfiddle.com] >> Sent: Wednesday, December 20, 2023 at 23:37 UTC >> To: Ant Users List >> Subject: javac task question >> >> >> This actually does what I want: >> >> <?xml version="1.0" encoding="UTF-8"?> >> >> <project name="test" default="t" basedir="."> >> >> <path id="p"> >> <fileset dir="a"/> >> <fileset dir="b"/> >> </path> >> >> <target name="t"> >> <javac srcdir="." sourcepathref="p"/> >> </target> >> >> </project> >> >> The problem is that I don’t really want to specify srcdir, but if I leave it >> out, the build fails (see below). >> I would need to create a fake directory to use as srcdir to be sure that I >> don’t accidentally compile unwanted sources. >> >> >> Apache Ant(TM) version 1.10.14 compiled on August 16 2023 >> Trying the default build file: build.xml >> Buildfile: /Users/alan/testAnt1/build.xml >> Detected Java version: 21 in: >> /Library/Java/JavaVirtualMachines/jdk-21.0.1.jdk/Contents/Home >> Detected OS: Mac OS X >> parsing buildfile /Users/alan/testAnt1/build.xml with URI = >> file:/Users/alan/testAnt1/build.xml >> Project base dir set to: /Users/alan/testAnt1 >> parsing buildfile >> jar:file:/Users/alan/.ant/lib/vbuilder-ant-uber-1.0-SNAPSHOT.jar!/org/apache/tools/ant/antlib.xml >> with URI = >> jar:file:/Users/alan/.ant/lib/vbuilder-ant-uber-1.0-SNAPSHOT.jar!/org/apache/tools/ant/antlib.xml >> from a zip file >> parsing buildfile >> jar:file:/usr/local/ant/lib/ant.jar!/org/apache/tools/ant/antlib.xml with >> URI = jar:file:/usr/local/ant/lib/ant.jar!/org/apache/tools/ant/antlib.xml >> from a zip file >> Build sequence for target(s) `t' is [t] >> Complete build sequence is [t, ] >> >> t: >> >> BUILD FAILED >> /Users/alan/testAnt1/build.xml:11: either srcdir or modulesourcepath >> attribute must be set! >> at org.apache.tools.ant.taskdefs.Javac.checkParameters(Javac.java:1309) >> at org.apache.tools.ant.taskdefs.Javac.execute(Javac.java:1080) >> at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:299) >> at >> java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:103) >> at java.base/java.lang.reflect.Method.invoke(Method.java:580) >> at >> org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:99) >> at org.apache.tools.ant.Task.perform(Task.java:350) >> at org.apache.tools.ant.Target.execute(Target.java:449) >> at org.apache.tools.ant.Target.performTasks(Target.java:470) >> at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1401) >> at org.apache.tools.ant.Project.executeTarget(Project.java:1374) >> at >> org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41) >> at org.apache.tools.ant.Project.executeTargets(Project.java:1264) >> at org.apache.tools.ant.Main.runBuild(Main.java:818) >> at org.apache.tools.ant.Main.startAnt(Main.java:223) >> at org.apache.tools.ant.launch.Launcher.run(Launcher.java:284) >> at org.apache.tools.ant.launch.Launcher.main(Launcher.java:101) >> >> Total time: 0 seconds >> >> >> On Dec 19, 2023, at 10:17 PM, Jaikiran Pai <jaiki...@apache.org> wrote: >> >> Hello Alan, >> >> It's hard to say what's going on. Do you have a build file (or a snippet) to >> show what issue you are running into? >> >> Which version of Java and Ant is this showing up on? >> >> -Jaikiran >> >> On 18/12/23 1:44 am, Alan Snyder wrote: >> I know of a couple of ways to run javac on more than one source tree. >> >> One way is to use nested src elements. >> >> Another way is like this: >> >> srcdir="${src}:${src2}” >> >> I would like to generalize this solution to a dynamicly determined list of >> source trees. >> >> I thought that I could use srcpath for this purpose, but the task would fail >> if srcdir was not specified or it did not identify a valid directory. >> That restriction defeats my purpose. >> >> Is there a solution? >> >> Is the inability to use srcpath by itself a bug? >> >> Thank you. >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: user-unsubscr...@ant.apache.org >> For additional commands, e-mail: user-h...@ant.apache.org >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: user-unsubscr...@ant.apache.org >> For additional commands, e-mail: user-h...@ant.apache.org >> >> >> >> >> >> --------------------------------------------------------------------- >> To unsubscribe, e-mail: user-unsubscr...@ant.apache.org >> For additional commands, e-mail: user-h...@ant.apache.org >> > > > --------------------------------------------------------------------- > To unsubscribe, e-mail: user-unsubscr...@ant.apache.org > For additional commands, e-mail: user-h...@ant.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@ant.apache.org For additional commands, e-mail: user-h...@ant.apache.org
