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| This is a status page for keeping track of what needs to be done to make progress on Mercurial on Python 3. Nobody is actively working on this - AugieFackler works on it sporadically, and would be happy to see patches on this topic flagged with Py3 on the mailing list. The work in progress is visible at http://hg.durin42.com/hg-py3k/ - note that ChangesetEvolution is in use on that repository, and so hashes will change over time as the patchset is rebased. | = Python 3 = To see a summary of our current position on Python 3 support, see SupportedPythonVersions#Python_3.x_support. |
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| The most significant problem at the moment is some lingering cyclic imports in the codebase: | This is a status page for keeping track of what needs to be done to make progress on Mercurial on Python 3. |
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| ==== cmdutil -> subrepo -> cmdutil ==== | Nobody is actively working on this - AugieFackler works on it sporadically, and would be happy to see patches on this topic flagged with Py3 on the mailing list. The work in progress is visible at http://hg.durin42.com/hg-py3k/ - note that ChangesetEvolution is in use on that repository, and so hashes will change over time as the patchset is rebased. |
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| The easiest fix for this would be to move hgsubrepo to a new file, and then fix the registration mechanism to be dependency injected somehow. | == What Works == run-tests.py can pass its own tests (test-run-tests.py and test-run-tests.t) under 2.6, 2.7 and 3.5. |
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| ==== mercurial.repoview -> mercurial.revset -> mercurial.repoview ==== ==== mercurial.fileset -> mercurial.merge -> mercurial.subrepo -> mercurial.match -> mercurial.fileset ==== If hgsubrepo moved out of subrepo, this would also be resolve.d ==== mercurial.filemerge -> mercurial.match -> mercurial.fileset -> mercurial.merge -> mercurial.filemerge ==== |
== Next Steps == * Eliminate all Python 3 compatibility warnings from [[https://selenic.com/repo/hg/file/default/tests/test-check-py3-compat.t|test-check-py3-compat.t]] * Get the entire codebase working with 'from future import absolute_import' * This requires fixing some cyclic imports. See [[https://selenic.com/repo/hg/file/default/tests/test-check-module-imports.t|test-check-module-imports.t]] for currently whitelisted cyclic imports. * Make existing modules at least parse with Python 3 (still some Python 2.x syntax) * Remove 2to3 and have the source be 2.6/2.7/3.5 compatible * Conditionalize imports for renamed modules * Get the C extensions compiling correctly in Python 3 * Start adding b'' and u'' everywhere and using 'from future import unicode_literals' |
Note:
This page is primarily intended for developers of Mercurial.
Python 3
To see a summary of our current position on Python 3 support, see SupportedPythonVersions#Python_3.x_support.
This is a status page for keeping track of what needs to be done to make progress on Mercurial on Python 3.
Nobody is actively working on this - AugieFackler works on it sporadically, and would be happy to see patches on this topic flagged with Py3 on the mailing list. The work in progress is visible at http://hg.durin42.com/hg-py3k/ - note that ChangesetEvolution is in use on that repository, and so hashes will change over time as the patchset is rebased.
1. What Works
run-tests.py can pass its own tests (test-run-tests.py and test-run-tests.t) under 2.6, 2.7 and 3.5.
2. Next Steps
Eliminate all Python 3 compatibility warnings from test-check-py3-compat.t
- Get the entire codebase working with 'from future import absolute_import'
This requires fixing some cyclic imports. See test-check-module-imports.t for currently whitelisted cyclic imports.
- Make existing modules at least parse with Python 3 (still some Python 2.x syntax)
- Remove 2to3 and have the source be 2.6/2.7/3.5 compatible
- Conditionalize imports for renamed modules
- Get the C extensions compiling correctly in Python 3
Start adding b and u everywhere and using 'from future import unicode_literals'