chattr makes cygport slow

[Brian Inglis]

On 2023-07-06 06:19, Andrew Schulman via Cygwin-apps wrote:
> Recently I noticed that `cygport finish` has become really slow on some of my
> package source trees. After I run for example
> 
> cygport libargp.cygport finish
> 
> it waits for about 5 minutes without any message to the console, before the
> first "Removing work directory" message appears.
> 
> pstree shows that during this time cygport is waiting for chattr. In
> /usr/bin/cygport I see:
> 
> if [ $OSTYPE = "cygwin" ]
> then
>      chattr -fR +C ${workdir} >/dev/null 2>&1 || true
> fi
> 
> which is trying to make the workdir case-sensitive.
> 
> Whatever the advantages of that are, it can take a long time. Would it be
> possible to skip it at least in the case of "finish"? It seems silly to spend
> all that time fixing up a directory tree that we then turn around and remove
> with rm -rf.

The attribute does not appear to be inheritable, so will not be applied to 
subdirectories created by make, or in cygport xargs commands, unless supported 
in cygwin1.dll, perhaps why it is open coded in cygport?

Perhaps it could be moved below case prep, into src_prep `__mkdirs`, or globally 
define `mkdir_p()` which applies it to each directory in those paths?
Could this also be defined in MKDIR_P for make or are those limited to binaries?

All cygport scripts appear to consistently use `mkdir -p` including after `xargs 
-r` (`--no-run-if-empty`) except:

/usr/share/cygport/cygclass/fossil.cygclass:    mkdir ${FOSSIL_MODULE}

-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer     but when there is no more to cut
                                 -- Antoine de Saint-Exupéry