py36-cartopy @0.15.1_2: install fails: setup.py can't find proj

[mndavidoff (Monte Davidoff)]

Installing py36-cartopy gets this error:

$ sudo port -vs install py36-cartopy
--->  Computing dependencies for py36-cartopy.
--->  Fetching distfiles for py36-cartopy
--->  Verifying checksums for py36-cartopy
--->  Checksumming cartopy-0.15.1.tar.gz
--->  Extracting py36-cartopy
--->  Extracting cartopy-0.15.1.tar.gz
Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_python_py-cartopy/py36-cartopy/work" && /usr/bin/gzip -dc '/opt/local/var/macports/distfiles/py-cartopy/cartopy-0.15.1.tar.gz' | /usr/bin/tar -xf - 
--->  Configuring py36-cartopy
--->  Building py36-cartopy
Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_python_py-cartopy/py36-cartopy/work/cartopy-0.15.1" && /opt/local/Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6 setup.py --no-user-cfg build 
Proj4 4.9.0 must be installed.
Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_python_py-cartopy/py36-cartopy/work/cartopy-0.15.1" && /opt/local/Library/Frameworks/Python.framework/Versions/3.6/bin/python3.6 setup.py --no-user-cfg build 
Exit code: 1
Error: Failed to build py36-cartopy: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_python_py-cartopy/py36-cartopy/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.
Error: Processing of port py36-cartopy failed

The proj4 port installs /opt/local/lib/proj49/bin/proj, so maybe the py-cartopy setup.py can't find the proj executable there.

[news24lor]

Hi

Yes. It does not see proj49 folder. This problem is similar to other packages (py-spatialite, ...)

I've resolved with symbolic link.

$ sudo ln -s /opt/local/lib/proj49/bin/geod /opt/local/bin/
$ sudo ln -s /opt/local/lib/proj49/bin/nad2bin /opt/local/bin/
$ sudo ln -s /opt/local/lib/proj49/bin/proj /opt/local/bin/
$ sudo ln -s /opt/local/lib/proj49/lib/libproj.dylib /opt/local/lib/
$ sudo ln -s /opt/local/lib/proj49/lib/libproj.a /opt/local/lib/
$
$ sudo ln -s /opt/local/lib/proj49/include/proj_api.h /opt/local/include
$ sudo ln -s /opt/local/lib/proj49/include/geodesic.h /opt/local/include/
$ sudo ln -s /opt/local/lib/proj49/include/org_proj4_PJ.h /opt/local/include/
$ sudo ln -s /opt/local/lib/proj49/include/org_proj4_Projections.h /opt/local/include/

[platipodium (Carsten Lemmen)]

Just to confirm @news24lor solution works for me, and for py27-spatialite

[dbevans (David B. Evans)]

This appears to be the result of the recent commit that allows both proj4 and proj (version 5) to install in parallel by installing them in versioned directories under ${prefix}/lib

See e3710d6800e803ebaa9528d3bdb38fb2fcade513/macports-ports

The proj executables are now installed in

${prefix]/lib/proj49/bin/proj
${prefix}/lib/proj5/bin/proj

Adding the symbolic links would cause these two ports to conflict once again.

A better solution would be to configure and/or patch this port and the others effected to correctly find the proj/proj5 install path.

As stated above, python ports that depends on proj4 are

py-cartopy                    
py-spatialite                 

Python ports that depend directly on proj 5.0 are

py-pyproj     (fixed, builds with either, proj by default)                  

[ryandesign (Ryan Carsten Schmidt)]

Has duplicate #56266.

Replying to news24lor:

I've resolved with symbolic link.

Make sure you remove those symlinks later. The files were moved around for a reason; creating these symlinks subverts that.

[dbevans (David B. Evans)]

In 0c5b6630d7069764bc950a02c71ea93011ae75ff/macports-ports:

py-cartopy: update to version 0.16.0, dependencies, configuration

• build requires pkgconfig
• add search paths for proj4 binary and pkgconfig files to build/destroot env
• allows setup.py to identify proj4 non-standard location and build flags

Closes #56150

[dbevans (David B. Evans)]

In 7bd182906a0fdcff28a5a53b1a2791059886b399/macports-ports:

py-spatialite: build fix for relocated proj4

Add proj4 include and lib paths to setup.py.

See #56150
Closes #56175