Squashed 'third_party/git/' content from commit cb71568594

git-subtree-dir: third_party/git
git-subtree-split: cb715685942260375e1eb8153b0768a376e4ece7

1 files changed, 380 insertions, 0 deletions

diff --git a/revision.h b/revision.h
new file mode 100644
index 000000000000..4134dc6029c4
--- /dev/null
+++ b/revision.h
@@ -0,0 +1,380 @@
+#ifndef REVISION_H
+#define REVISION_H
+
+#include "commit.h"
+#include "parse-options.h"
+#include "grep.h"
+#include "notes.h"
+#include "pretty.h"
+#include "diff.h"
+#include "commit-slab-decl.h"
+
+/* Remember to update object flag allocation in object.h */
+#define SEEN		(1u<<0)
+#define UNINTERESTING   (1u<<1)
+#define TREESAME	(1u<<2)
+#define SHOWN		(1u<<3)
+#define TMP_MARK	(1u<<4) /* for isolated cases; clean after use */
+#define BOUNDARY	(1u<<5)
+#define CHILD_SHOWN	(1u<<6)
+#define ADDED		(1u<<7)	/* Parents already parsed and added? */
+#define SYMMETRIC_LEFT	(1u<<8)
+#define PATCHSAME	(1u<<9)
+#define BOTTOM		(1u<<10)
+/*
+ * Indicates object was reached by traversal. i.e. not given by user on
+ * command-line or stdin.
+ * NEEDSWORK: NOT_USER_GIVEN doesn't apply to commits because we only support
+ * filtering trees and blobs, but it may be useful to support filtering commits
+ * in the future.
+ */
+#define NOT_USER_GIVEN	(1u<<25)
+#define TRACK_LINEAR	(1u<<26)
+#define ALL_REV_FLAGS	(((1u<<11)-1) | NOT_USER_GIVEN | TRACK_LINEAR)
+
+#define TOPO_WALK_EXPLORED	(1u<<27)
+#define TOPO_WALK_INDEGREE	(1u<<28)
+
+#define DECORATE_SHORT_REFS	1
+#define DECORATE_FULL_REFS	2
+
+struct log_info;
+struct repository;
+struct rev_info;
+struct string_list;
+struct saved_parents;
+define_shared_commit_slab(revision_sources, char *);
+
+struct rev_cmdline_info {
+	unsigned int nr;
+	unsigned int alloc;
+	struct rev_cmdline_entry {
+		struct object *item;
+		const char *name;
+		enum {
+			REV_CMD_REF,
+			REV_CMD_PARENTS_ONLY,
+			REV_CMD_LEFT,
+			REV_CMD_RIGHT,
+			REV_CMD_MERGE_BASE,
+			REV_CMD_REV
+		} whence;
+		unsigned flags;
+	} *rev;
+};
+
+#define REVISION_WALK_WALK 0
+#define REVISION_WALK_NO_WALK_SORTED 1
+#define REVISION_WALK_NO_WALK_UNSORTED 2
+
+struct oidset;
+struct topo_walk_info;
+
+struct rev_info {
+	/* Starting list */
+	struct commit_list *commits;
+	struct object_array pending;
+	struct repository *repo;
+
+	/* Parents of shown commits */
+	struct object_array boundary_commits;
+
+	/* The end-points specified by the end user */
+	struct rev_cmdline_info cmdline;
+
+	/* excluding from --branches, --refs, etc. expansion */
+	struct string_list *ref_excludes;
+
+	/* Basic information */
+	const char *prefix;
+	const char *def;
+	struct pathspec prune_data;
+
+	/*
+	 * Whether the arguments parsed by setup_revisions() included any
+	 * "input" revisions that might still have yielded an empty pending
+	 * list (e.g., patterns like "--all" or "--glob").
+	 */
+	int rev_input_given;
+
+	/*
+	 * Whether we read from stdin due to the --stdin option.
+	 */
+	int read_from_stdin;
+
+	/* topo-sort */
+	enum rev_sort_order sort_order;
+
+	unsigned int early_output;
+
+	unsigned int	ignore_missing:1,
+			ignore_missing_links:1;
+
+	/* Traversal flags */
+	unsigned int	dense:1,
+			prune:1,
+			no_walk:2,
+			remove_empty_trees:1,
+			simplify_history:1,
+			topo_order:1,
+			simplify_merges:1,
+			simplify_by_decoration:1,
+			single_worktree:1,
+			tag_objects:1,
+			tree_objects:1,
+			blob_objects:1,
+			verify_objects:1,
+			edge_hint:1,
+			edge_hint_aggressive:1,
+			limited:1,
+			unpacked:1,
+			boundary:2,
+			count:1,
+			left_right:1,
+			left_only:1,
+			right_only:1,
+			rewrite_parents:1,
+			print_parents:1,
+			show_decorations:1,
+			reverse:1,
+			reverse_output_stage:1,
+			cherry_pick:1,
+			cherry_mark:1,
+			bisect:1,
+			ancestry_path:1,
+			first_parent_only:1,
+			line_level_traverse:1,
+			tree_blobs_in_commit_order:1,
+
+			/*
+			 * Blobs are shown without regard for their existence.
+			 * But not so for trees: unless exclude_promisor_objects
+			 * is set and the tree in question is a promisor object;
+			 * OR ignore_missing_links is set, the revision walker
+			 * dies with a "bad tree object HASH" message when
+			 * encountering a missing tree. For callers that can
+			 * handle missing trees and want them to be filterable
+			 * and showable, set this to true. The revision walker
+			 * will filter and show such a missing tree as usual,
+			 * but will not attempt to recurse into this tree
+			 * object.
+			 */
+			do_not_die_on_missing_tree:1,
+
+			/* for internal use only */
+			exclude_promisor_objects:1;
+
+	/* Diff flags */
+	unsigned int	diff:1,
+			full_diff:1,
+			show_root_diff:1,
+			no_commit_id:1,
+			verbose_header:1,
+			ignore_merges:1,
+			combine_merges:1,
+			combined_all_paths:1,
+			dense_combined_merges:1,
+			always_show_header:1;
+
+	/* Format info */
+	unsigned int	shown_one:1,
+			shown_dashes:1,
+			show_merge:1,
+			show_notes:1,
+			show_notes_given:1,
+			show_signature:1,
+			pretty_given:1,
+			abbrev_commit:1,
+			abbrev_commit_given:1,
+			zero_commit:1,
+			use_terminator:1,
+			missing_newline:1,
+			date_mode_explicit:1,
+			preserve_subject:1;
+	unsigned int	disable_stdin:1;
+	/* --show-linear-break */
+	unsigned int	track_linear:1,
+			track_first_time:1,
+			linear:1;
+
+	struct date_mode date_mode;
+	int		expand_tabs_in_log; /* unset if negative */
+	int		expand_tabs_in_log_default;
+
+	unsigned int	abbrev;
+	enum cmit_fmt	commit_format;
+	struct log_info *loginfo;
+	int		nr, total;
+	const char	*mime_boundary;
+	const char	*patch_suffix;
+	int		numbered_files;
+	int		reroll_count;
+	char		*message_id;
+	struct ident_split from_ident;
+	struct string_list *ref_message_ids;
+	int		add_signoff;
+	const char	*extra_headers;
+	const char	*log_reencode;
+	const char	*subject_prefix;
+	int		no_inline;
+	int		show_log_size;
+	struct string_list *mailmap;
+
+	/* Filter by commit log message */
+	struct grep_opt	grep_filter;
+	/* Negate the match of grep_filter */
+	int invert_grep;
+
+	/* Display history graph */
+	struct git_graph *graph;
+
+	/* special limits */
+	int skip_count;
+	int max_count;
+	timestamp_t max_age;
+	timestamp_t min_age;
+	int min_parents;
+	int max_parents;
+	int (*include_check)(struct commit *, void *);
+	void *include_check_data;
+
+	/* diff info for patches and for paths limiting */
+	struct diff_options diffopt;
+	struct diff_options pruning;
+
+	struct reflog_walk_info *reflog_info;
+	struct decoration children;
+	struct decoration merge_simplification;
+	struct decoration treesame;
+
+	/* notes-specific options: which refs to show */
+	struct display_notes_opt notes_opt;
+
+	/* interdiff */
+	const struct object_id *idiff_oid1;
+	const struct object_id *idiff_oid2;
+	const char *idiff_title;
+
+	/* range-diff */
+	const char *rdiff1;
+	const char *rdiff2;
+	int creation_factor;
+	const char *rdiff_title;
+
+	/* commit counts */
+	int count_left;
+	int count_right;
+	int count_same;
+
+	/* line level range that we are chasing */
+	struct decoration line_log_data;
+
+	/* copies of the parent lists, for --full-diff display */
+	struct saved_parents *saved_parents_slab;
+
+	struct commit_list *previous_parents;
+	const char *break_bar;
+
+	struct revision_sources *sources;
+
+	struct topo_walk_info *topo_walk_info;
+};
+
+int ref_excluded(struct string_list *, const char *path);
+void clear_ref_exclusion(struct string_list **);
+void add_ref_exclusion(struct string_list **, const char *exclude);
+
+
+#define REV_TREE_SAME		0
+#define REV_TREE_NEW		1	/* Only new files */
+#define REV_TREE_OLD		2	/* Only files removed */
+#define REV_TREE_DIFFERENT	3	/* Mixed changes */
+
+/* revision.c */
+typedef void (*show_early_output_fn_t)(struct rev_info *, struct commit_list *);
+extern volatile show_early_output_fn_t show_early_output;
+
+struct setup_revision_opt {
+	const char *def;
+	void (*tweak)(struct rev_info *, struct setup_revision_opt *);
+	const char *submodule;	/* TODO: drop this and use rev_info->repo */
+	unsigned int	assume_dashdash:1,
+			allow_exclude_promisor_objects:1;
+	unsigned revarg_opt;
+};
+
+#ifndef NO_THE_REPOSITORY_COMPATIBILITY_MACROS
+#define init_revisions(revs, prefix) repo_init_revisions(the_repository, revs, prefix)
+#endif
+void repo_init_revisions(struct repository *r,
+			 struct rev_info *revs,
+			 const char *prefix);
+int setup_revisions(int argc, const char **argv, struct rev_info *revs,
+		    struct setup_revision_opt *);
+void parse_revision_opt(struct rev_info *revs, struct parse_opt_ctx_t *ctx,
+			const struct option *options,
+			const char * const usagestr[]);
+#define REVARG_CANNOT_BE_FILENAME 01
+#define REVARG_COMMITTISH 02
+int handle_revision_arg(const char *arg, struct rev_info *revs,
+			int flags, unsigned revarg_opt);
+
+void reset_revision_walk(void);
+int prepare_revision_walk(struct rev_info *revs);
+struct commit *get_revision(struct rev_info *revs);
+char *get_revision_mark(const struct rev_info *revs,
+			const struct commit *commit);
+void put_revision_mark(const struct rev_info *revs,
+		       const struct commit *commit);
+
+void mark_parents_uninteresting(struct commit *commit);
+void mark_tree_uninteresting(struct repository *r, struct tree *tree);
+void mark_trees_uninteresting_sparse(struct repository *r, struct oidset *trees);
+
+void show_object_with_name(FILE *, struct object *, const char *);
+
+void add_pending_object(struct rev_info *revs,
+			struct object *obj, const char *name);
+void add_pending_oid(struct rev_info *revs,
+		     const char *name, const struct object_id *oid,
+		     unsigned int flags);
+
+void add_head_to_pending(struct rev_info *);
+void add_reflogs_to_pending(struct rev_info *, unsigned int flags);
+void add_index_objects_to_pending(struct rev_info *, unsigned int flags);
+
+enum commit_action {
+	commit_ignore,
+	commit_show,
+	commit_error
+};
+
+enum commit_action get_commit_action(struct rev_info *revs,
+				     struct commit *commit);
+enum commit_action simplify_commit(struct rev_info *revs,
+				   struct commit *commit);
+
+enum rewrite_result {
+	rewrite_one_ok,
+	rewrite_one_noparents,
+	rewrite_one_error
+};
+
+typedef enum rewrite_result (*rewrite_parent_fn_t)(struct rev_info *revs, struct commit **pp);
+
+int rewrite_parents(struct rev_info *revs,
+		    struct commit *commit,
+		    rewrite_parent_fn_t rewrite_parent);
+
+/*
+ * The log machinery saves the original parent list so that
+ * get_saved_parents() can later tell what the real parents of the
+ * commits are, when commit->parents has been modified by history
+ * simpification.
+ *
+ * get_saved_parents() will transparently return commit->parents if
+ * history simplification is off.
+ */
+struct commit_list *get_saved_parents(struct rev_info *revs, const struct commit *commit);
+
+#endif