git-commit-vandalism/Documentation/config/log.txt
Derrick Stolee a6be5e6764 log: add log.excludeDecoration config option
In 'git log', the --decorate-refs-exclude option appends a pattern
to a string_list. This list is used to prevent showing some refs
in the decoration output, or even by --simplify-by-decoration.

Users may want to use their refs space to store utility refs that
should not appear in the decoration output. For example, Scalar [1]
runs a background fetch but places the "new" refs inside the
refs/scalar/hidden/<remote>/* refspace instead of refs/<remote>/*
to avoid updating remote refs when the user is not looking. However,
these "hidden" refs appear during regular 'git log' queries.

A similar idea to use "hidden" refs is under consideration for core
Git [2].

Add the 'log.excludeDecoration' config option so users can exclude
some refs from decorations by default instead of needing to use
--decorate-refs-exclude manually. The config value is multi-valued
much like the command-line option. The documentation is careful to
point out that the config value can be overridden by the
--decorate-refs option, even though --decorate-refs-exclude would
always "win" over --decorate-refs.

Since the 'log.excludeDecoration' takes lower precedence to
--decorate-refs, and --decorate-refs-exclude takes higher
precedence, the struct decoration_filter needed another field.
This led also to new logic in load_ref_decorations() and
ref_filter_match().

There are several tests in t4202-log.sh that test the
--decorate-refs-(include|exclude) options, so these are extended.
Since the expected output is already stored as a file, most tests
could simply replace a "--decorate-refs-exclude" option with an
in-line config setting. Other tests involve the precedence of
the config option compared to command-line options and needed more
modification.

[1] https://github.com/microsoft/scalar
[2] https://lore.kernel.org/git/77b1da5d3063a2404cd750adfe3bb8be9b6c497d.1585946894.git.gitgitgadget@gmail.com/

Helped-by: Junio C Hamano <gister@pobox.com>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2020-04-16 11:05:48 -07:00

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log.abbrevCommit::
If true, makes linkgit:git-log[1], linkgit:git-show[1], and
linkgit:git-whatchanged[1] assume `--abbrev-commit`. You may
override this option with `--no-abbrev-commit`.
log.date::
Set the default date-time mode for the 'log' command.
Setting a value for log.date is similar to using 'git log''s
`--date` option. See linkgit:git-log[1] for details.
log.decorate::
Print out the ref names of any commits that are shown by the log
command. If 'short' is specified, the ref name prefixes 'refs/heads/',
'refs/tags/' and 'refs/remotes/' will not be printed. If 'full' is
specified, the full ref name (including prefix) will be printed.
If 'auto' is specified, then if the output is going to a terminal,
the ref names are shown as if 'short' were given, otherwise no ref
names are shown. This is the same as the `--decorate` option
of the `git log`.
log.excludeDecoration::
Exclude the specified patterns from the log decorations. This is
similar to the `--decorate-refs-exclude` command-line option, but
the config option can be overridden by the `--decorate-refs`
option.
log.follow::
If `true`, `git log` will act as if the `--follow` option was used when
a single <path> is given. This has the same limitations as `--follow`,
i.e. it cannot be used to follow multiple files and does not work well
on non-linear history.
log.graphColors::
A list of colors, separated by commas, that can be used to draw
history lines in `git log --graph`.
log.showRoot::
If true, the initial commit will be shown as a big creation event.
This is equivalent to a diff against an empty tree.
Tools like linkgit:git-log[1] or linkgit:git-whatchanged[1], which
normally hide the root commit will now show it. True by default.
log.showSignature::
If true, makes linkgit:git-log[1], linkgit:git-show[1], and
linkgit:git-whatchanged[1] assume `--show-signature`.
log.mailmap::
If true, makes linkgit:git-log[1], linkgit:git-show[1], and
linkgit:git-whatchanged[1] assume `--use-mailmap`, otherwise
assume `--no-use-mailmap`. True by default.