Symlink python_deps.sh and add paragraph in the caveats (see #10649)

[sbesson]

Copy python_deps.sh to /usr/local/bin and add note to caveats.

When updating the formula for 4.4.7, we can remove the if (build.head? or build.devel)?

[sbesson]

From OMERO-homebrew-develop#19

==> Caveats

For non-homebrew Python, you need to set your PYTHONPATH:
export PYTHONPATH=/usr/local/Cellar/omero/5.0.0-DEV/lib/python:$PYTHONPATH

To finish the installation, source python_deps.sh in your shell:
  source /usr/local/Cellar/omero/5.0.0-DEV/bin/python_deps.sh

==> Summary
      /usr/local/Cellar/omero/5.0.0-DEV: 5968 files, 166M, built in 13.3 minutes

[joshmoore]

My vote would be to rename python_deps.sh to omero_python_deps. Also, does it need to be sourced or can it just be executed?

[sbesson]

• Should we rename the file in the main code or in the formula installation?
• Execution should be enough

[joshmoore]

When inside of the ome.git there's no reason to prefix with "omero_" so I'd say just rename in homebrew.

[sbesson]

From OMERO-homebrew-stable#139

==> Checking out branch dev_4_4
==> ./build.py -Dice.home=/usr/local build-default
==> Linking zeroc libaries
==> Caveats

For non-homebrew Python, you need to set your PYTHONPATH:
export PYTHONPATH=/usr/local/Cellar/omero/HEAD/lib/python:$PYTHONPATH

To finish the installation, source or execute omero_python_deps in your
shell:
  source /usr/local/Cellar/omero/HEAD/bin/omero_python_deps

==> Summary
üç∫  /usr/local/Cellar/omero/HEAD: 5920 files, 184M, built in 13.6 minutes

[joshmoore]

My only nitpick is that I'm concerned that the script if sourced will execute the current shell. Would you be willing to remove the source or wording?

[joshmoore]

There was a minor issue with brew install sbesson/alt/omero caused by much older formulae zeroc-ice33 and berkeley-db46. Uninstalling both of them fixed the issue.

Otherwise, location and naming of script seem fine:

sbesson-alt moore$ which omero_python_deps
/usr/local/bin/omero_python_deps
sbesson-alt moore$ omero_python_deps
/usr/local/bin/omero_python_deps: line 26: bin/pip: No such file or directory
pip 1.0.2 from /usr/local/lib/python2.6/site-packages/pip-1.0.2-py2.6.egg (python 2.6)
Using existing pip installed in /usr/local

Two comments which may be for another PR:

• The check for bin/pip is no longer really appropriate in this context.
• The use of git for pytables causes a re-install even if already present. We might need to reconsider this.

Thoughts?

[sbesson]

@joshmoore: both comments are valid but need to be fixed in a openmicroscopy PR.

• re bin/pip: unless you move to /usr/local first, this is true. Would you check for pip only?
• re pytables, I have no idea why we use the git instead of pip install tables. Is it a compatibility issue? Else using the default pypi package would make things simpler indeed /cc @manics

[joshmoore]

• Point 1: I'm not sure. I'm wondering if we have two different use cases. Once it's been renamed to omero_python_deps we know that we're inside of homebrew whereas when using this raw in OMERO, we don't. In the OMERO case, it seems you don't want to check for bin/pip, highly unlikely to work. In the homebrew case, you actually want to look for $(brew --prefix/bin/pip) I think.
• Point 2: With newer version of tables, we can probably move away from git.

[joshmoore]

With ome/openmicroscopy#886 👍