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# The `release_docs` directory
## Intro
This directory contains instructions for building and using the library as
well as the HDF5 history files.
## HISTORY files
The HISTORY files contain the history of this branch of HDF5. They fall into
three categories.
### HISTORY-\[VERSION 1\]-\[VERSION 2\].txt
These files are created when we release a new major version and include all
the changes that were made to develop while creating a major release.
### HISTORY-\[VERSION\].txt
This file contains the changes that were made to a maintenance branch since
it split off from `develop`. It will also be found in the `develop` branch
when experimental releases have been created.
### RELEASE.txt
This is the changelog for the current version of the library.
For a MAJOR release (or in `develop`) this files lists all the changes since the
last major version. For a MINOR release (or in a maintenance branch), this file
lists all the changes since the last release in the maintenance branch.
Examples:
* The file for HDF5 1.14.0 includes all the changes since HDF5 1.12.0
* The file for HDF5 1.10.9 includes all the changes since HDF5 1.10.8
* The file in `develop` includes all the changes since the last major release
* The file in `hdf5_1_14` includes all the changes since the last minor HDF5 1.14 release
Note that we make no effort to bring maintenance branch HISTORY files back to
develop. If you want to compare, say, 1.10.4 with 1.12.3, you'd have to get
the history files from those releases and compare them by hand.
## Creating new releases
### MAJOR release
* If there were experimental releases, merge the experimental HISTORY file
and the current RELEASE.txt by category to create a separate, unified
file that ignores the experimental releases. Don't check this in yet or
clobber any existing HISTORY/RELEASE files, but put it someplace handy for
use in later steps.
* Create the new maintenance branch
In develop:
* Create the new HISTORY-\[VERSION 1\]-\[VERSION 2\].txt file
* If there is an experimental HISTORY file, add RELEASE.txt to the beginning of it and use that
* Otherwise, start with RELEASE.txt
* Add the introduction boilerplate like in the other HISTORY files (TOC, etc.)
* Delete any experimental HISTORY file
* Clear out RELEASE.txt
Note that we're KEEPING any experimental release history information in the
HISTORY-\[VERSION 1\]-\[VERSION 2\].txt file, so do NOT use the merged file in
the above steps!
In the new maintenance branch:
* Create the new HISTORY-\[VERSION\].txt file
* If there is an experimental HISTORY file use the combined file you created earlier
* Otherwise, start with RELEASE.txt
* Add the introduction boilerplate like in the other HISTORY files (TOC, etc.)
* Delete any experimental HISTORY file
* Clear out RELEASE.txt
* Create the new release branch
In the new release branch:
* If there were experimental releases, use the combined file you created earlier as RELEASE.txt
* Otherwise the RELEASE.txt will be used as-is
### MINOR release
* Create the release branch
In the maintenance branch:
* Add the contents of RELEASE.txt to the beginnnig of HISTORY-\[VERSION\].txt
* Clear out RELEASE.txt
### EXPERIMENTAL release
* Add the contents of RELEASE.txt to the beginnnig of HISTORY-\[VERSION\].txt
* Clear out RELEASE.txt
## INSTALL files
These files include instructions for building and installing HDF5 on various
platforms.
## USING files
These files document how to build HDF5 applications with an installed HDF5
library.
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