scons @3.0.0 doesn't support python 2 print statements

[trwyant]

Installation of serf1 failed with error

:info:build scons: Reading SConscript files ...
:info:build   File "/opt/local/var/macports/build
/_opt_local_var_macports_sources_rsync.macports.org_macports_release_tarballs_ports_www_serf1/serf1/work/serf-1.3.8/SConstruct", line 181
:info:build     print 'Unknown variables:', ', '.join(unknown.keys())
:info:build                              ^
:info:build SyntaxError: invalid syntax

The problem appears to be that the Python print command is a function, and requires parentheses. At any rate, I supplied parentheses around the print() arguments, and was able to install successfully. The full log file is attached.

$ uname -a
Darwin <censored>.local 17.0.0 Darwin Kernel Version 17.0.0: Thu Aug 24 21:48:19 PDT 2017; root:xnu-4570.1.46~2/RELEASE_X86_64 x86_64

Yes, this is High Sierra; I built MacPorts from source.

[trwyant]

Log file of failed installation

[mf2k (Frank Schima)]

In the future, please Cc the port maintainers (port info --maintainers serf1), if any.

[ryandesign (Ryan Carsten Schmidt)]

Has duplicate #54917.

[ryandesign (Ryan Carsten Schmidt)]

The issue is not High Sierra-specific, but users of earlier macOS versions aren't generally seeing the problem because they get binaries from our server. The question is, why did we not see the issue back when we made the binaries last year?

The answer appears to be scons 3.0.0. Reverting to scons 2.5.1 allows the build to succeed. So I'm inclined to call this a bug in scons 3. Anybody want to report it to the developers of scons for guidance?

Note that in python 2, print is a statement, not a function. It changed to a function in python 3, and thus requires parentheses. So then we must ask: did scons 3.0.0 switch from python 2 to 3 and now require all other projects' SConstruct files to be python 3-compatible? Surely they can't have done that; that would be awful.

[Dmole (Tim)]

I did not have this issue on 10.12 and currently do not have it on 10.11 so I think this is 10.13 specific.

(lists @1.3.8 vs @1.3.8_0)

[ryandesign (Ryan Carsten Schmidt)]

The issue is not OS-specific. The problem is caused by scons 3.0.0. I see the issue on macoS 10.12 when building from source. You won't see it on 10.12 or below if you have a MacPorts configuration that receives our pre-built binaries, which were built before scons 3.0.0 existed.

The ​documentation for scons 3.0.0 shows print being used as a function—and shows "SyntaxError: invalid syntax" occurring as a result! It's as if the documentation is generated by actually running scons and showing its real output, and nobody noticed that print doesn't work anymore.

[ryandesign (Ryan Carsten Schmidt)]

Looks like they've ​already fixed the problem.

[ryandesign (Ryan Carsten Schmidt)]

In 45c0e3e45fae0eb6a39d45f9ac46036183560a49/macports-ports:

scons: Fix support for Python 2 print statements

Closes: #54915

[Dmole (Tim)]

Is there a way to install this yet?

sudo port selfupdate
sudo port uninstall serf1
sudo port clean serf1
--->  Cleaning serf1
sudo port -s install serf1
--->  Computing dependencies for serf1
--->  Fetching distfiles for serf1
--->  Verifying checksums for serf1
--->  Extracting serf1
--->  Applying patches to serf1
--->  Configuring serf1
--->  Building serf1
Error: Failed to build serf1: command execution failed
Error: See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_serf1/serf1/main.log for details.
Error: Follow https://guide.macports.org/#project.tickets to report a bug.
Error: Processing of port serf1 failed

version:1
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:debug:main Reading variant descriptions from /opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/_resources/port1.0/variant_descriptions.conf
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:debug:main No need to upgrade! apr-util 1.6.0_0 >= apr-util 1.6.0_0
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:debug:main db46 4.6.21_10 exists in the ports tree
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:debug:main universal variant already exists, so not adding the default one
:debug:main Running callback portconfigure::add_automatic_compiler_dependencies
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:msg:main --->  Computing dependencies for serf1:info:main .:debug:main serf1 has no conflicts
:debug:main Searching for dependency: scons
:debug:main Found Dependency: receipt exists for scons
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:debug:main Found Dependency: receipt exists for apr
:debug:main Searching for dependency: apr-util
:debug:main Found Dependency: receipt exists for apr-util
:debug:main Searching for dependency: openssl
:debug:main Found Dependency: receipt exists for openssl
:debug:main Searching for dependency: zlib
:debug:main Found Dependency: receipt exists for zlib
:debug:main Executing org.macports.main (serf1)
:debug:main dropping privileges: euid changed to 502, egid changed to 501.
:debug:archivefetch archivefetch phase started at Wed Sep 27 15:44:53 EDT 2017
:debug:archivefetch Executing org.macports.archivefetch (serf1)
:debug:archivefetch Privilege de-escalation not attempted as not running as root.
:debug:fetch fetch phase started at Wed Sep 27 15:44:53 EDT 2017
:notice:fetch --->  Fetching distfiles for serf1
:debug:fetch Executing org.macports.fetch (serf1)
:debug:fetch Privilege de-escalation not attempted as not running as root.
:debug:checksum checksum phase started at Wed Sep 27 15:44:53 EDT 2017
:notice:checksum --->  Verifying checksums for serf1
:debug:checksum Executing org.macports.checksum (serf1)
:info:checksum --->  Checksumming serf-1.3.8.tar.bz2
:debug:checksum Calculated (sha1) is 1d45425ca324336ce2f4ae7d7b4cfbc5567c5446
:debug:checksum Correct (sha1) checksum for serf-1.3.8.tar.bz2
:debug:checksum Calculated (sha256) is e0500be065dbbce490449837bb2ab624e46d64fc0b090474d9acaa87c82b2590
:debug:checksum Correct (sha256) checksum for serf-1.3.8.tar.bz2
:debug:checksum Privilege de-escalation not attempted as not running as root.
:debug:extract extract phase started at Wed Sep 27 15:44:53 EDT 2017
:notice:extract --->  Extracting serf1
:debug:extract setting option extract.cmd to /usr/bin/bzip2
:debug:extract Executing org.macports.extract (serf1)
:info:extract --->  Extracting serf-1.3.8.tar.bz2
:debug:extract setting option extract.args to '/opt/local/var/macports/distfiles/serf1/serf-1.3.8.tar.bz2'
:debug:extract Environment: 
:debug:extract CC_PRINT_OPTIONS='YES'
:debug:extract CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_serf1/serf1/work/.CC_PRINT_OPTIONS'
:debug:extract CPATH='/opt/local/include'
:debug:extract LIBRARY_PATH='/opt/local/lib'
:debug:extract MACOSX_DEPLOYMENT_TARGET='10.13'
:info:extract Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_serf1/serf1/work" && /usr/bin/bzip2 -dc '/opt/local/var/macports/distfiles/serf1/serf-1.3.8.tar.bz2' | /usr/bin/tar -xf - 
:debug:extract system:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_serf1/serf1/work" && /usr/bin/bzip2 -dc '/opt/local/var/macports/distfiles/serf1/serf-1.3.8.tar.bz2' | /usr/bin/tar -xf - 
:debug:extract euid/egid changed to: 0/0
:debug:extract chowned /opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_serf1/serf1/work to macports
:debug:extract euid/egid changed to: 502/501
:debug:extract Privilege de-escalation not attempted as not running as root.
:debug:patch patch phase started at Wed Sep 27 15:44:53 EDT 2017
:debug:patch Executing org.macports.patch (serf1)
:notice:patch --->  Applying patches to serf1
:info:patch --->  Applying patch-SConstruct.diff
:debug:patch Environment: 
:debug:patch CC_PRINT_OPTIONS='YES'
:debug:patch CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_serf1/serf1/work/.CC_PRINT_OPTIONS'
:debug:patch CPATH='/opt/local/include'
:debug:patch LIBRARY_PATH='/opt/local/lib'
:debug:patch MACOSX_DEPLOYMENT_TARGET='10.13'
:info:patch Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_serf1/serf1/work/serf-1.3.8" && /usr/bin/patch -p0 < '/opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/www/serf1/files/patch-SConstruct.diff'
:debug:patch system:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_serf1/serf1/work/serf-1.3.8" && /usr/bin/patch -p0 < '/opt/local/var/macports/sources/rsync.macports.org/release/tarballs/ports/www/serf1/files/patch-SConstruct.diff'
:info:patch patching file ./SConstruct
:info:patch Hunk #3 succeeded at 223 (offset -2 lines).
:info:patch Hunk #4 succeeded at 400 (offset -2 lines).
:debug:patch Privilege de-escalation not attempted as not running as root.
:debug:configure configure phase started at Wed Sep 27 15:44:53 EDT 2017
:notice:configure --->  Configuring serf1
:debug:configure Preferred compilers: clang macports-clang-3.9 macports-clang-3.8 macports-clang-3.7
:debug:configure Using compiler 'Xcode Clang'
:debug:configure Executing org.macports.configure (serf1)
:debug:configure Privilege de-escalation not attempted as not running as root.
:debug:build build phase started at Wed Sep 27 15:44:53 EDT 2017
:notice:build --->  Building serf1
:debug:build Executing org.macports.build (serf1)
:debug:build Environment: 
:debug:build CC_PRINT_OPTIONS='YES'
:debug:build CC_PRINT_OPTIONS_FILE='/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_serf1/serf1/work/.CC_PRINT_OPTIONS'
:debug:build CPATH='/opt/local/include'
:debug:build LIBRARY_PATH='/opt/local/lib'
:debug:build MACOSX_DEPLOYMENT_TARGET='10.13'
:info:build Executing:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_serf1/serf1/work/serf-1.3.8" && /opt/local/bin/scons -j4 APR=/opt/local APU=/opt/local OPENSSL=/opt/local PREFIX=/opt/local CC=/usr/bin/clang CPPFLAGS="-I/opt/local/include" CFLAGS="-Os -arch x86_64" LINKFLAGS="-L/opt/local/lib -Wl,-headerpad_max_install_names -arch x86_64" CC="MACOSX_DEPLOYMENT_TARGET=10.13 /usr/bin/clang" 
:debug:build system:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_serf1/serf1/work/serf-1.3.8" && /opt/local/bin/scons -j4 APR=/opt/local APU=/opt/local OPENSSL=/opt/local PREFIX=/opt/local CC=/usr/bin/clang CPPFLAGS="-I/opt/local/include" CFLAGS="-Os -arch x86_64" LINKFLAGS="-L/opt/local/lib -Wl,-headerpad_max_install_names -arch x86_64" CC="MACOSX_DEPLOYMENT_TARGET=10.13 /usr/bin/clang" 
:info:build scons: Reading SConscript files ...
:info:build   File "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_serf1/serf1/work/serf-1.3.8/SConstruct", line 181
:info:build     print 'Unknown variables:', ', '.join(unknown.keys())
:info:build                              ^
:info:build SyntaxError: invalid syntax
:info:build Command failed:  cd "/opt/local/var/macports/build/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_serf1/serf1/work/serf-1.3.8" && /opt/local/bin/scons -j4 APR=/opt/local APU=/opt/local OPENSSL=/opt/local PREFIX=/opt/local CC=/usr/bin/clang CPPFLAGS="-I/opt/local/include" CFLAGS="-Os -arch x86_64" LINKFLAGS="-L/opt/local/lib -Wl,-headerpad_max_install_names -arch x86_64" CC="MACOSX_DEPLOYMENT_TARGET=10.13 /usr/bin/clang" 
:info:build Exit code: 2
:error:build Failed to build serf1: command execution failed
:debug:build Error code: CHILDSTATUS 45913 2
:debug:build Backtrace: command execution failed
:debug:build     while executing
:debug:build "system {*}$notty {*}$nice $fullcmdstring"
:debug:build     invoked from within
:debug:build "command_exec build"
:debug:build     (procedure "portbuild::build_main" line 8)
:debug:build     invoked from within
:debug:build "$procedure $targetname"
:error:build See /opt/local/var/macports/logs/_opt_local_var_macports_sources_rsync.macports.org_release_tarballs_ports_www_serf1/serf1/main.log for details.

[ryandesign (Ryan Carsten Schmidt)]

Replying to Dmole:

Is there a way to install this yet?

It takes time for changes to propagate from git to our rsync server. Maybe an hour, sometimes more. If you can't wait, set up your ports tree to pull directly from git. Instructions are in the wiki.

[Dmole (Tim)]

OK, I was confused because one the other bugs was because "sourceforge is down" and I thought macports supported alternative download locations which I assumed would include sourceforge / github / etc, but I guess macports has not figured out redundancy yet. Thanks for taking the time to answer my n00b question, I'll just wait and try again in a few days (I can nmap from Linux or homebrew until then if I need to)

[ryandesign (Ryan Carsten Schmidt)]

The fact that SourceForge is down doesn't affect scons or serf right now. serf isn't hosted there, and although scons is, MacPorts also has a global network of mirror servers and a content delivery network which have the current scons source code file.

The only "problem" here is that changes we commit to our repository are not instantaneously available on our rsync server. The script that generates the content that will go on the rsync server runs every half hour. After it runs, the result has to be synchronized to the rsync server; that synchronization runs every half hour as well. Sometimes there are a lot of files to synchronize, which can make it take longer than an hour before you receive changes. If you configure MacPorts to get its port definitions from git instead of rsync, you can get changes instantly.

[Dmole (Tim)]

Sorry if this is going way off topic but for my own education this issue: #54918 leads me to believe that the macports CDN is generally limited (Not just a bit delayed).

[ryandesign (Ryan Carsten Schmidt)]

netpbm and other ports that are programmed to fetch directly from a source code repository cannot currently be mirrored, without manual effort expended by the port author. This is why we prefer that portfiles are authored to fetch from a tarball or other similar single file, but some software, like netpbm, is not distributed that way. Work has been done on MacPorts base master to automatically create tarballs in these situations; that will be released in a future version of MacPorts, probably 2.5.

[ryandesign (Ryan Carsten Schmidt)]

Has duplicate #54923.