GOAL: To replace one entry in a zip file with an updated file.
I cannot find an elegant way to do this, short of <unzip>'ing the
archive, replacing the file of interest and then re-<zip>. It seems
there should be a better way. Can anyone help?
Thanks.
--Cyril
FWIW, It looks like the Ant 1.6.5 source code *tried* to support this.
Note that the comment describes a the setting "overwrite" for the
duplicate attribute of <zip> task which would provide exactly what I
want, the bad news is that it doesn't seem to be implemented. :-(
I've included the comment, and the duplicate logic below.
>From src/main/org/apache/tools/ant/taskdefs/Zip.java:
...
/**
* Sets behavior for when a duplicate file is about to be added -
* one of <code>keep</code>, <code>skip</code> or <code>overwrite</code>.
* Possible values are: <code>keep</code> (keep both
* of the files); <code>skip</code> (keep the first version
* of the file found); <code>overwrite</code> overwrite the file
* with the new file
* Default for zip tasks is <code>keep</code>
*/
public void setDuplicate(Duplicate df) {
duplicate = df.getValue();
}
...
/**
* Adds a new entry to the archive, takes care of duplicates as well.
*
* @param in the stream to read data for the entry from.
* @param zOut the stream to write to.
* @param vPath the name this entry shall have in the archive.
* @param lastModified last modification time for the entry.
* @param fromArchive the original archive we are copying this
* entry from, will be null if we are not copying from an archive.
* @param mode the Unix permissions to set.
*
* @since Ant 1.5.2
*/
protected void zipFile(InputStream in, ZipOutputStream zOut, String vPath,
long lastModified, File fromArchive, int mode)
throws IOException {
if (entries.contains(vPath)) {
if (duplicate.equals("preserve")) {
log(vPath + " already added, skipping", Project.MSG_INFO);
return;
} else if (duplicate.equals("fail")) {
throw new BuildException("Duplicate file " + vPath
+ " was found and the duplicate "
+ "attribute is 'fail'.");
} else {
// duplicate equal to add, so we continue
log("duplicate file " + vPath
+ " found, adding.", Project.MSG_VERBOSE);
}
} else {
log("adding entry " + vPath, Project.MSG_VERBOSE);
}
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