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The 'write_commit_graph()' function takes in either a string list of pack indices, or a string list of hexadecimal commit OIDs. These correspond to the '--stdin-packs' and '--stdin-commits' mode(s) from 'git commit-graph write'. Using a string_list of hexadecimal commit IDs is not the most efficient use of memory, since we can instead use the 'struct oidset', which is more well-suited for this case. This has another benefit which will become apparent in the following commit. This is that we are about to disambiguate the kinds of errors we produce with '--stdin-commits' into "non-hex input" and "hex-input, but referring to a non-commit object". By having 'write_commit_graph' take in a 'struct oidset *' of commits, we place the burden on the caller (in this case, the builtin) to handle the first case, and the commit-graph machinery can handle the second case. Suggested-by: Jeff King <peff@peff.net> Signed-off-by: Taylor Blau <me@ttaylorr.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
128 lines
3.7 KiB
C
128 lines
3.7 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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#include "oidset.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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enum commit_graph_split_flags {
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COMMIT_GRAPH_SPLIT_UNSPECIFIED = 0,
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COMMIT_GRAPH_SPLIT_MERGE_PROHIBITED = 1,
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COMMIT_GRAPH_SPLIT_REPLACE = 2
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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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enum commit_graph_split_flags flags;
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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 oidset *commits,
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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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