[GSAS-II] Update problem on some Macs with gsas2full installations

[Toby, Brian H.]

Dear GSAS-II Users,

   Sorry for a long message, but this is only for Mac users. If you are using GSAS-II on Windows or Linux, you do not need to read farther.

   I have seen some problems where subversion (svn) has problems updating GSAS-II. As far as I can tell, this only happens on OS X (Macs) with gsas2full installations and probably only with 10.15.x (Catalina). The problem is noted when an error like this displayed in the terminal window during updates:

============================================================
****** Drat, failed again: *********
============================================================
svn: E155017: Checksum mismatch while updating ‘....cpython-37m-darwin.so':
   expected:  0347311810c0a981b9167f710b70509b
     actual:  c8fe8f890e1f8e9f83b546045984d8ef

Traceback (most recent call last):
  File "/Users/toby/gsas2full/GSASII/GSASIIpath.py", line 1153, in <module>
    fp.write('\n')
  File "/Users/toby/gsas2full/GSASII/GSASIIpath.py", line 476, in svnUpdateDir
    out,err = MakeByte2str(s.communicate())
Exception: svn update failed

I do not know why this happens, as it seems to be a failure of the installation process rather than something inside GSAS-II, since checksum errors are a sign that files are being altered. When this happens, the update fails after downloading only some of the files for the new version. This can leave GSAS-II in a state where the program will not start or will produce serious errors. What makes this even worse is that unless you look carefully at the update output in the console window you may not know that the update did not complete. I have now fixed the update process so that this problem is addressed, but if the update will not complete, you may not get the latest versions of the files that fix this.

One annoying, but fairly simple fix for this would be to reinstall GSAS-II from the latest gsas2full distribution (created last night). Instructions here: https://subversion.xray.aps.anl.gov/trac/pyGSAS/wiki/MacSingleStepInstallerFigs.

Alternately, for those of you more comfortable with downloading individual files and running commands, use this link  https://subversion.xray.aps.anl.gov/trac/pyGSAS/export/head/install/bootstrap.py move that file into …/GSASII and then use these commands in a terminal window to run an update with this file:

source …/bin/activate
python …/GSASII/bootstrap.py

(replace … with the location where you installed GSAS-II, which by default is ~/gsas2full). It is also possible to download the latest GSASIIpath.py with URL https://subversion.xray.aps.anl.gov/trac/pyGSAS/export/head/trunk/GSASIIpath.py and move that file into …/GSASII and then try the update from inside GSAS-II.

How can you tell if this problem exists? You can run this command in a terminal window:

…/bin/svn …/GSASII

If there are any files marked with a *, those files still need to be updated, as below:

toby at BHT20 ~ % ~/gsas2full/bin/svn st -u ~/gsas2full/GSASII
    S   *     4408   /Users/toby/gsas2full/GSASII/bindist/histosigma2d.cpython-37m-darwin.so
    S   *     4408   /Users/toby/gsas2full/GSASII/bindist/polymask.cpython-37m-darwin.so
    S   *     4408   /Users/toby/gsas2full/GSASII/bindist/spotmask.cpython-37m-darwin.so
    S   *     4408   /Users/toby/gsas2full/GSASII/bindist/pyspg.cpython-37m-darwin.so
    S   *     4408   /Users/toby/gsas2full/GSASII/bindist/fellipse.cpython-37m-darwin.so
    S   *     4408   /Users/toby/gsas2full/GSASII/bindist/histogram2d.cpython-37m-darwin.so
    S   *     4408   /Users/toby/gsas2full/GSASII/bindist/pack_f.cpython-37m-darwin.so
    S   *     4408   /Users/toby/gsas2full/GSASII/bindist/pypowder.cpython-37m-darwin.so
    S   *     4408   /Users/toby/gsas2full/GSASII/bindist/pytexture.cpython-37m-darwin.so
    S   *     4408   /Users/toby/gsas2full/GSASII/bindist/pydiffax.cpython-37m-darwin.so
    S   *     4408   /Users/toby/gsas2full/GSASII/bindist/unpack_cbf.cpython-37m-darwin.so
! L S         4645   /Users/toby/gsas2full/GSASII/bindist
        *     4408   /Users/toby/gsas2full/GSASII/NIST_profile/atan_windowed_FP_profile.py
        *     4408   /Users/toby/gsas2full/GSASII/ElementTable.py
...

This on the other hand is normal:

toby at BHT20 ~ % ~/gsas2full/bin/svn st -u /Users/toby/gsas2full/GSASII
    S         4645   /Users/toby/gsas2full/GSASII/bindist
?                    /Users/toby/gsas2full/GSASII/GSAS-II.py
!             4645   /Users/toby/gsas2full/GSASII/AllBinaries
?                    /Users/toby/gsas2full/GSASII/GSAS-II g2full.app
?                    /Users/toby/gsas2full/GSASII/bootstrap.log
?                    /Users/toby/gsas2full/GSASII/bootstrap.py
?                    /Users/toby/gsas2full/GSASII/GSAS-II.app
?                    /Users/toby/gsas2full/GSASII/config.py
Status against revision:   4645

If there are files to update and but the update menu command in GSAS-II says you are already updated to the latest version, you may be able to fix this by downgrading by a version and then upgrading.

There is a lot here. If this is not clear or you are stuck with problems, please contact me (toby at anl.gov<mailto:toby at anl.gov>) and I will help you. My preference would be to do this over a Zoom session.

Brian
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