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resolve-undo: record resolved conflicts in a new index extension section

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When resolving a conflict using "git add" to create a stage #0 entry, or
"git rm" to remove entries at higher stages, remove_index_entry_at()
function is eventually called to remove unmerged (i.e. higher stage)
entries from the index.  Introduce a "resolve_undo_info" structure and
keep track of the removed cache entries, and save it in a new index
extension section in the index_state.

Operations like "read-tree -m", "merge", "checkout [-m] <branch>" and
"reset" are signs that recorded information in the index is no longer
necessary.  The data is removed from the index extension when operations
start; they may leave conflicted entries in the index, and later user
actions like "git add" will record their conflicted states afresh.

Signed-off-by: Junio C Hamano <gitster@pobox.com>
This commit is contained in:
Junio C Hamano
2009-12-25 00:30:51 -08:00
parent be6ff8196d
commit cfc5789ada
8 changed files with 160 additions and 1 deletions
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14
resolve-undo.h Normal file
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#ifndef RESOLVE_UNDO_H
#define RESOLVE_UNDO_H
struct resolve_undo_info {
unsigned int mode[3];
unsigned char sha1[3][20];
};
extern void record_resolve_undo(struct index_state *, struct cache_entry *);
extern void resolve_undo_write(struct strbuf *, struct string_list *);
extern struct string_list *resolve_undo_read(void *, unsigned long);
extern void resolve_undo_clear_index(struct index_state *);
#endif