doc: Add doc/develop/release_cycle.rst
Migrate the RelaseCycle wiki page to Sphinx. In terms of visible changes, we stop having a dynamic countdown to when the release is. And we drop the year-based statistics, that were not being kept up to date. For the moment, we only link to statistics for v2022.07 but will add back the historical data in a subsequent patch. Cc: Heinrich Schuchardt <xypron.glpk@gmx.de> Signed-off-by: Tom Rini <trini@konsulko.com>
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@ -12,6 +12,7 @@ General
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codingstyle
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codingstyle
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designprinciples
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designprinciples
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process
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process
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release_cycle
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Implementation
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Implementation
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--------------
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--------------
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@ -0,0 +1,94 @@
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Release Cycle
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=============
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The U-Boot projects attempts to maintain a fixed, predictable Release
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Cycle as follows:
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* We will have U-Boot releases at a fixed release interval of (approximately)
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every 3 months.
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* Under normal conditions the release date will be the first Monday of the month.
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* Immediately following each release, there will be a "merge window" of
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normally 21 days, i. e. if the release was on a Monday, then the merge window
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will close on the Monday in the 3rd week after the release.
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While this merge window is open, new features can be added to the U-Boot
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source tree. This is further expanded on in the :doc:`process`.
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* After the merge window closes, no new features may be added to allow for a
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release candidate phase which is intended to fix bugs and regressions.
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*Note:* While we try to adhere to the release schedule, we will
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not hesitate and take the liberty to delay a release if there are
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good reasons, for example if there are known bugs or other technical
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reasons. The code will be released when it is considered ready
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without caring too much about the announced deadline.
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*Note 2:* Even though we follow Linux ways in many respects, there are
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differences in the actual procedures, which are documented in the
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:doc:`process`.
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Version Numbers
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---------------
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Starting with the release in October 2008, the names of the releases were
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changed from numerical release numbers without deeper meaning into a time stamp
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based numbering. Regular releases are now identified by names consisting of
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the calendar year and month of the release date. Additional fields are
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frequently used to denote the release candidates. They are also used on rare
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occasions to note a bug fix release on top of the previous stable release.
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Examples::
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U-Boot v2009.11 - Release November 2009
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U-Boot v2009.11.1 - Bug fix release 1 on top of the November 2009 release
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U-Boot v2010.09-rc1 - Release candidate 1 for September 2010 release
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Current Status
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--------------
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* U-Boot v2022.07 was released on Mon 11 July 2022.
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* The Merge Window for the next release (v2022.10) is **open** until -rc1
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release on Mon 25 July 2022.
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* Release "v2022.10" is scheduled for 03 Oct 2022.
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Future Releases
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---------------
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.. The following commented out dates are for when release candidates are
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planned to be tagged.
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.. For the next scheduled release, release candidates were made on::
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.. * U-Boot v2022.10-rc1 was released on Mon 25 July 2022.
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.. * U-Boot v2022.10-rc2 was released on Mon 08 August 2022.
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.. * U-Boot v2022.10-rc3 was released on Mon 22 August 2022.
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.. * U-Boot v2022.10-rc4 was released on Mon 05 September 2022.
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.. * U-Boot v2022.10-rc5 was released on Mon 19 September 2022.
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Please note that the following dates are planned only and may be deviated from
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as needed.
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* "v2022.10": end of MW = Mon, Jul 25, 2022; release = Mon, Oct 03, 2022
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* "v2023.01": end of MW = Mon, Oct 24, 2022; release = Mon, Jan 09, 2023
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* "v2023.04": end of MW = Mon, Jan 30, 2022; release = Mon, Apr 03, 2023
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* "v2023.07": end of MW = Mon, Apr 24, 2023; release = Mon, Jul 03, 2023
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Previous Releases
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-----------------
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Note: these statistics are generated by our fork of `gitdm
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<https://source.denx.de/u-boot/gitdm>`_, which was originally created by
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Jonathan Corbet.
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* :doc:`statistics/u-boot-stats-v2022.07` which was released on 11 July 2022.
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