diff options
| author | Derrick Stolee <dstolee@microsoft.com> | 2022-05-23 13:48:40 +0000 |
|---|---|---|
| committer | Junio C Hamano <gitster@pobox.com> | 2022-05-23 11:08:21 -0700 |
| commit | 9fadb373dd4a670e761776560d3c40f6fcc80360 (patch) | |
| tree | 8ab4319ce1d7f80eb6bab7012ffd8afa0eeb5479 /read-cache.c | |
| parent | dce241b020cf32c9485c7ef23247f0b003731afa (diff) | |
| download | git-9fadb373dd4a670e761776560d3c40f6fcc80360.tar.gz | |
sparse-index: introduce partially-sparse indexes
A future change will present a temporary, in-memory mode where the index
can both contain sparse directory entries but also not be completely
collapsed to the smallest possible sparse directories. This will be
necessary for modifying the sparse-checkout definition while using a
sparse index.
For now, convert the single-bit member 'sparse_index' in 'struct
index_state' to be a an 'enum sparse_index_mode' with three modes:
* INDEX_EXPANDED (0): No sparse directories exist. This is always the
case for repositories that do not use cone-mode sparse-checkout.
* INDEX_COLLAPSED: Sparse directories may exist. Files outside the
sparse-checkout cone are reduced to sparse directory entries whenever
possible.
* INDEX_PARTIALLY_SPARSE: Sparse directories may exist. Some file
entries outside the sparse-checkout cone may exist. Running
convert_to_sparse() may further reduce those files to sparse directory
entries.
The main reason to store this extra information is to allow
convert_to_sparse() to short-circuit when the index is already in
INDEX_EXPANDED mode but to actually do the necessary work when in
INDEX_PARTIALLY_SPARSE mode.
The INDEX_PARTIALLY_SPARSE mode will be used in an upcoming change.
Signed-off-by: Derrick Stolee <derrickstolee@github.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
Diffstat (limited to 'read-cache.c')
| -rw-r--r-- | read-cache.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/read-cache.c b/read-cache.c index 4df97e185e..b236042eee 100644 --- a/read-cache.c +++ b/read-cache.c @@ -112,7 +112,7 @@ static const char *alternate_index_output; static void set_index_entry(struct index_state *istate, int nr, struct cache_entry *ce) { if (S_ISSPARSEDIR(ce->ce_mode)) - istate->sparse_index = 1; + istate->sparse_index = INDEX_COLLAPSED; istate->cache[nr] = ce; add_name_hash(istate, ce); @@ -1856,7 +1856,7 @@ static int read_index_extension(struct index_state *istate, break; case CACHE_EXT_SPARSE_DIRECTORIES: /* no content, only an indicator */ - istate->sparse_index = 1; + istate->sparse_index = INDEX_COLLAPSED; break; default: if (*ext < 'A' || 'Z' < *ext) @@ -3149,7 +3149,7 @@ static int do_write_locked_index(struct index_state *istate, struct lock_file *l unsigned flags) { int ret; - int was_full = !istate->sparse_index; + int was_full = istate->sparse_index == INDEX_EXPANDED; ret = convert_to_sparse(istate, 0); |