An alternative, and far more portable work-around is to just use the
overwrite attribute on the second copy task.
Phil :n)
On Tue, 2005-03-08 at 16:11, Xxx Yyy wrote:
> I looked, but didn't find any discussion on the new granularity
> FileUtils.getFileTimestampGranularity. This is messing up my builds
> big-time.
>
> If you are on Windows and you run two COPY operations within two
> seconds of each other, the second COPY will be skipped.
>
> <project default="x">
> <target name="x">
> <touch file="aaa"/>
> <copy file="aaa" tofile="bbb"/>
> <sleep seconds="1"/>
> <touch file="aaa"/>
> <copy file="aaa" tofile="bbb"/>
> </target>
> </project>
>
> G:\temp>ant -verbose
> Apache Ant version 1.6.2 compiled on July 16 2004
> Buildfile: build.xml
> Detected Java version: 1.4 in: C:\util\jdk\1.4.2\jre
> Detected OS: Windows 2003
> parsing buildfile G:\temp\build.xml with URI =
> file:///G:/temp/build.xml
> Project base dir set to: G:\temp
> [property] Loading Environment env.
> Build sequence for target `x' is [x]
> Complete build sequence is [x, ]
>
> x:
> [copy] Copying 1 file to G:\temp
> [copy] Copying G:\temp\aaa to G:\temp\bbb
> [sleep] sleeping for 1000 milliseconds
> [copy] G:\temp\aaa omitted as G:\temp\bbb is up to date.
>
> BUILD SUCCESSFUL
> Total time: 3 seconds
> G:\temp>
>
>
> The problem stems from this code in FileUtils.java.
>
> public long getFileTimestampGranularity() {
> if (Os.isFamily("dos")) {
> return FAT_FILE_TIMESTAMP_GRANULARITY;
> } else {
> return 0;
> }
> }
>
> This is a very poor test. I guess there's a limitted granularity of
> timestamps on FAT formatted disks. But this test is assuming that any
> drive under DOS or Windows is FAT formatted.
>
> My build files have this pattern:
>
> <make a temporary copy of file-A>
> <work on temporary copy, growing and changing it>
> <when work is complete, replace master copy with temporary>
>
> If the work takes more than two seconds (or build is run on other os,
> unix for example), then the ANT COPY works. If the work completes in
> under two seconds on Windows, ANT COPY fails.
>
> Temporary work-around is to override the granularity attribute on COPY.
> But the root cause of the problem (bad test in FileUtils) needs to be
> fixed.
>
> http://issues.apache.org/bugzilla/show_bug.cgi?id=33906
>
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--
Phil Weighill-Smith <[EMAIL PROTECTED]>
Volantis Systems
