a7df60cac8
Apply a similar treatment as in the previous patch to pass a 'struct object_directory *' through the 'load_commit_graph_one_fd_st' initializer, too. This prevents a potential bug where a pointer comparison is made to a NULL 'g->odb', which would cause the commit-graph machinery to think that a pair of commit-graphs belonged to different alternates when in fact they do not (i.e., in the case of no '--object-dir'). Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
120 lines
3.5 KiB
C
120 lines
3.5 KiB
C
#ifndef COMMIT_GRAPH_H
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#define COMMIT_GRAPH_H
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#include "git-compat-util.h"
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#include "repository.h"
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#include "string-list.h"
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#include "cache.h"
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#include "object-store.h"
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#define GIT_TEST_COMMIT_GRAPH "GIT_TEST_COMMIT_GRAPH"
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#define GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD "GIT_TEST_COMMIT_GRAPH_DIE_ON_LOAD"
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struct commit;
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char *get_commit_graph_filename(struct object_directory *odb);
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int open_commit_graph(const char *graph_file, int *fd, struct stat *st);
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/*
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* Given a commit struct, try to fill the commit struct info, including:
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* 1. tree object
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* 2. date
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* 3. parents.
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*
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* Returns 1 if and only if the commit was found in the packed graph.
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*
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* See parse_commit_buffer() for the fallback after this call.
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*/
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int parse_commit_in_graph(struct repository *r, struct commit *item);
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/*
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* It is possible that we loaded commit contents from the commit buffer,
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* but we also want to ensure the commit-graph content is correctly
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* checked and filled. Fill the graph_pos and generation members of
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* the given commit.
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*/
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void load_commit_graph_info(struct repository *r, struct commit *item);
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struct tree *get_commit_tree_in_graph(struct repository *r,
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const struct commit *c);
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struct commit_graph {
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int graph_fd;
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const unsigned char *data;
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size_t data_len;
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unsigned char hash_len;
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unsigned char num_chunks;
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uint32_t num_commits;
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struct object_id oid;
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char *filename;
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struct object_directory *odb;
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uint32_t num_commits_in_base;
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struct commit_graph *base_graph;
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const uint32_t *chunk_oid_fanout;
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const unsigned char *chunk_oid_lookup;
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const unsigned char *chunk_commit_data;
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const unsigned char *chunk_extra_edges;
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const unsigned char *chunk_base_graphs;
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};
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struct commit_graph *load_commit_graph_one_fd_st(int fd, struct stat *st,
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struct object_directory *odb);
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struct commit_graph *read_commit_graph_one(struct repository *r,
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struct object_directory *odb);
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struct commit_graph *parse_commit_graph(void *graph_map, int fd,
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size_t graph_size);
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/*
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* Return 1 if and only if the repository has a commit-graph
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* file and generation numbers are computed in that file.
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*/
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int generation_numbers_enabled(struct repository *r);
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enum commit_graph_write_flags {
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COMMIT_GRAPH_WRITE_APPEND = (1 << 0),
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COMMIT_GRAPH_WRITE_PROGRESS = (1 << 1),
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COMMIT_GRAPH_WRITE_SPLIT = (1 << 2),
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/* Make sure that each OID in the input is a valid commit OID. */
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COMMIT_GRAPH_WRITE_CHECK_OIDS = (1 << 3)
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};
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struct split_commit_graph_opts {
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int size_multiple;
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int max_commits;
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timestamp_t expire_time;
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};
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/*
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* The write_commit_graph* methods return zero on success
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* and a negative value on failure. Note that if the repository
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* is not compatible with the commit-graph feature, then the
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* methods will return 0 without writing a commit-graph.
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*/
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int write_commit_graph_reachable(struct object_directory *odb,
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enum commit_graph_write_flags flags,
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const struct split_commit_graph_opts *split_opts);
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int write_commit_graph(struct object_directory *odb,
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struct string_list *pack_indexes,
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struct string_list *commit_hex,
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enum commit_graph_write_flags flags,
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const struct split_commit_graph_opts *split_opts);
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#define COMMIT_GRAPH_VERIFY_SHALLOW (1 << 0)
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int verify_commit_graph(struct repository *r, struct commit_graph *g, int flags);
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void close_commit_graph(struct raw_object_store *);
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void free_commit_graph(struct commit_graph *);
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/*
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* Disable further use of the commit graph in this process when parsing a
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* "struct commit".
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*/
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void disable_commit_graph(struct repository *r);
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#endif
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