tar (cygwin)

eantoranz · 12-05-2013, 10:24 AM

Hi!

I have this script that works like a charm that I use to generate a tgz from the files that have changed on a git branch from a certain treeish. I work on linux and it simply works.

Now, we are giving it a round on cygwin (git console, just in case) and we found that it doesn't include all changed files.

I checked that the list of files to tar is getting to the tar command (with a simple echo to make sure all parameters were being provided) and they are..... given that tar is running with zcvf I was able to see the list of files that it was compressing... it's some 200+ files.... no error output. I even tried without v so that I would only get error output instead of the list of files (no error outout at all). It all seems ok.... but when we check the tgz file there are only a handful (some 30 files) in the tgz instead of 200+ (as I said, on linux the package is generated correctly). Is there a reason for this?

tar is version 1.22 on cygwin.

rtmistler · 12-06-2013, 06:42 AM

Are some of the files symbolic links? Try the -h flag for tar which will follow symbolic links.

eantoranz · 12-06-2013, 07:12 AM

Actually, no. They are all real files.

---------- Post added 12-06-13 at 10:13 AM ----------

Could it be a problem with the permissions? I'll take a close look at that to see what comes out.

rtmistler · 12-06-2013, 07:28 AM

Could be if they're not read-able, or the directories are not read-able by the user running the script.

Take out the f and z flags, put it stdout and stderr into a log. You'll see the entire tar archive instead of it going to a file archive. See if you can detect missing data at the raw level. Yeah, it'll be huge. Or at least don't compress and see if the archive file is correct.

After all, an uncompressed tar is a tape archive, which is merely an intelligently concatenated (and check-pointed) archive of your files.

eantoranz · 12-06-2013, 07:42 AM

Ok.... just checked a file that did make it into the tgz and another that didn't. They both had the same permissions (both plane files) and when I ran tar manually to create a tgz adding both files, there was no problem, they both showed up on the tgz. Could it be just out of sheer chance that the tgz file ends up with 2^5+1 files?