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92 lines
3.3 KiB
Markdown
92 lines
3.3 KiB
Markdown
# Pending changelog entry directory
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This directory contains changelog entries that have not yet been merged
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to the changelog file ([`../ChangeLog`](../ChangeLog)).
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## What requires a changelog entry?
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Write a changelog entry if there is a user-visible change. This includes:
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* Bug fixes in the library or in sample programs: fixing a security hole,
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fixing broken behavior, fixing the build in some configuration or on some
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platform, etc.
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* New features in the library, new sample programs, or new platform support.
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* Changes in existing behavior. These should be rare. Changes in features
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that are documented as experimental may or may not be announced, depending
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on the extent of the change and how widely we expect the feature to be used.
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We generally don't include changelog entries for:
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* Documentation improvements.
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* Performance improvements, unless they are particularly significant.
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* Changes to parts of the code base that users don't interact with directly,
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such as test code and test data.
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* Fixes for compiler warnings. Releases typically contain a number of fixes
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of this kind, so we will only mention them in the Changelog if they are
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particularly significant.
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Until Mbed TLS 2.24.0, we required changelog entries in more cases.
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Looking at older changelog entries is good practice for how to write a
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changelog entry, but not for deciding whether to write one.
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## Changelog entry file format
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A changelog entry file must have the extension `*.txt` and must have the
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following format:
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Security
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* Change description.
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* Another change description.
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Features
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* Yet another change description. This is a long change description that
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spans multiple lines.
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* Yet again another change description.
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The permitted changelog entry categories are as follows:
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<!-- Keep this synchronized with STANDARD_CATEGORIES in assemble_changelog.py! -->
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API changes
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Default behavior changes
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Requirement changes
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New deprecations
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Removals
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Features
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Security
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Bugfix
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Changes
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Use “Changes” for anything that doesn't fit in the other categories.
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## How to write a changelog entry
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Each entry starts with three spaces, an asterisk and a space. Continuation
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lines start with 5 spaces. Lines wrap at 79 characters.
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Write full English sentences with proper capitalization and punctuation. Use
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the present tense. Use the imperative where applicable. For example: “Fix a
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bug in mbedtls_xxx() ….”
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Include GitHub issue numbers where relevant. Use the format “#1234” for an
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Mbed TLS issue. Add other external references such as CVE numbers where
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applicable.
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Credit bug reporters where applicable.
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**Explain why, not how**. Remember that the audience is the users of the
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library, not its developers. In particular, for a bug fix, explain the
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consequences of the bug, not how the bug was fixed. For a new feature, explain
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why one might be interested in the feature. For an API change or a deprecation,
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explain how to update existing applications.
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See [existing entries](../ChangeLog) for examples.
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## How `ChangeLog` is updated
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Run [`../scripts/assemble_changelog.py`](../scripts/assemble_changelog.py)
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from a Git working copy
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to move the entries from files in `ChangeLog.d` to the main `ChangeLog` file.
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