Errors installing python3

[andymccurdy]

brew doctor is clean. Copy of output:

https://gist.github.com/3351130

[jacknagel]

Can you gist brew --config? It looks like the config dump was cut off in your gist.

[andymccurdy]

Sure. Pasted below. I was able to finally get python3 to install by manually creating /usr/local/Cellar/python3/3.2.3/bin/2to3 while the install was running. I suspect the forumla is simply looking in the wrong place for that file... I think it should be looking here instead: /usr/local/Cellar/python3/3.2.3/Frameworks/Python.framework/Versions/3.2/bin

<shockwave:andy : ~ > brew --config
HOMEBREW_VERSION: 0.9.2
HEAD: e51c59144cc087a208eced3b848e759abf0e8d57
HOMEBREW_PREFIX: /usr/local
HOMEBREW_CELLAR: /usr/local/Cellar
CPU: 8-core 64-bit ivybridge
OS X: 10.8-x86_64
Xcode: 4.4.1
CLT: 4.4.0.0.1.1249367152
GCC-4.0: N/A
GCC-4.2: N/A
LLVM: build 2336
Clang: 4.0 build 421
MacPorts or Fink? false
X11: XQuartz 2.7.2 in /opt/X11
System Ruby: 1.8.7-358
Which Perl:   /usr/bin/perl
Which Python: /usr/local/bin/python => /usr/local/Cellar/python/2.7.3/Frameworks/Python.framework/Versions/2.7/bin/python2.7
Which Ruby:   /usr/bin/ruby => /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby

[jacknagel]

I've built python3 twice today and I can't reproduce this, so there must be something else at play.

[andymccurdy]

For what it's worth, I also have python25, python26, and python installed via homebrew.

[jacknagel]

Ah I see that it is guarded by a conditional, so perhaps I just never actually hit that codepath.

[jacknagel]

ping @samueljohn

[jacknagel]

Yeah I can reproduce this after doing a fresh install of python 2.7 followed by an install of python 3.

[jacknagel]

It appears that python3 only installs "2to3-3.2" to the main bin directory, so I suspect we can just remove this part altogether.

[jacknagel]

Addressed in e07689c by tightening the existence check, just in case.

[andymccurdy]

Thanks Jack!

[samueljohn]

@jacknagel thanks for quick response here (and the other fixes)!

Indeed, there is something mentioned in the changelog for 3.2.3

• Issue Add formula for libmetalink #10679: The "idle", "pydoc" and "2to3" scripts are now installed with
  a version-specific suffix on "make altinstall".

• But still interesting, that we observe the same versioned scripts here but don't use "altinstall" (we use the plain "make install"). Perhaps their commit message is not precise. I guess switching to make altinstall could make sense?
• You are right, we can remove the renaming of the scirpts. (But not of the .app dirs, I assume)
• Did they rename the "Python Launcher.app" and "IDLE.app", too? (I guess not. Needs a second look)
• We never had a conflict with pydoc. I think is has always been versioned. Strange.
• Further, the line ENV.append_to_cflags '-Qunused-arguments' is not needed, because I homebrew sets this arg already.

[samueljohn]

@andymccurdy Thanks for the report! Please note that python and python3 now always (and only) builds as a framework. And for python3 there is no universal option anymore (it failed building) - so your options are ignored.

Homebrew, unfortunately, not yet indicates a typo or wrong option given. However, I assume with the new option DSL, that is possible to implement.

@jacknagel I open a pull request to clean up python and python3. "make altinstall" is not necessary.