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core.fsync: add configuration parsing

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This change introduces code to parse the core.fsync setting and
configure the fsync_components variable.

core.fsync is configured as a comma-separated list of component names to
sync. Each time a core.fsync variable is encountered in the
configuration heirarchy, we start off with a clean state with the
platform default value. Passing 'none' resets the value to indicate
nothing will be synced. We gather all negative and positive entries from
the comma separated list and then compute the new value by removing all
the negative entries and adding all of the positive entries.

We issue a warning for components that are not recognized so that the
configuration code is compatible with configs from future versions of
Git with more repo components.

Complete documentation for the new setting is included in a later patch
in the series so that it can be reviewed once in final form.

Signed-off-by: Neeraj Singh <neerajsi@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Neeraj Singh
2022-03-10 22:43:22 +00:00
committed by Junio C Hamano
parent 020406eaa5
commit 844a8ad4f8
3 changed files with 82 additions and 5 deletions
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2
environment.c
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@ -42,7 +42,7 @@ const char *git_attributes_file;
const char *git_hooks_path;
int zlib_compression_level = Z_BEST_SPEED;
int pack_compression_level = Z_DEFAULT_COMPRESSION;
int fsync_object_files;
int fsync_object_files = -1;
int use_fsync = -1;
enum fsync_method fsync_method = FSYNC_METHOD_DEFAULT;
enum fsync_component fsync_components = FSYNC_COMPONENTS_DEFAULT;