1 files changed, 348 insertions, 0 deletions
diff --git a/third_party/git/remote.h b/third_party/git/remote.h
new file mode 100644
index 000000000000..11d8719b5877
--- /dev/null
+++ b/third_party/git/remote.h
@@ -0,0 +1,348 @@
+#ifndef REMOTE_H
+#define REMOTE_H
+
+#include "cache.h"
+#include "parse-options.h"
+#include "hashmap.h"
+#include "refspec.h"
+
+/**
+ * The API gives access to the configuration related to remotes. It handles
+ * all three configuration mechanisms historically and currently used by Git,
+ * and presents the information in a uniform fashion. Note that the code also
+ * handles plain URLs without any configuration, giving them just the default
+ * information.
+ */
+
+enum {
+	REMOTE_UNCONFIGURED = 0,
+	REMOTE_CONFIG,
+	REMOTE_REMOTES,
+	REMOTE_BRANCHES
+};
+
+struct remote {
+	struct hashmap_entry ent;
+
+	/* The user's nickname for the remote */
+	const char *name;
+
+	int origin, configured_in_repo;
+
+	const char *foreign_vcs;
+
+	/* An array of all of the url_nr URLs configured for the remote */
+	const char **url;
+
+	int url_nr;
+	int url_alloc;
+
+	/* An array of all of the pushurl_nr push URLs configured for the remote */
+	const char **pushurl;
+
+	int pushurl_nr;
+	int pushurl_alloc;
+
+	struct refspec push;
+
+	struct refspec fetch;
+
+	/*
+	 * The setting for whether to fetch tags (as a separate rule from the
+	 * configured refspecs);
+	 * -1 to never fetch tags
+	 * 0 to auto-follow tags on heuristic (default)
+	 * 1 to always auto-follow tags
+	 * 2 to always fetch tags
+	 */
+	int fetch_tags;
+
+	int skip_default_update;
+	int mirror;
+	int prune;
+	int prune_tags;
+
+	/**
+	 * The configured helper programs to run on the remote side, for
+	 * Git-native protocols.
+	 */
+	const char *receivepack;
+	const char *uploadpack;
+
+	/* The proxy to use for curl (http, https, ftp, etc.) URLs. */
+	char *http_proxy;
+
+	/* The method used for authenticating against `http_proxy`. */
+	char *http_proxy_authmethod;
+};
+
+/**
+ * struct remotes can be found by name with remote_get().
+ * remote_get(NULL) will return the default remote, given the current branch
+ * and configuration.
+ */
+struct remote *remote_get(const char *name);
+
+struct remote *pushremote_get(const char *name);
+int remote_is_configured(struct remote *remote, int in_repo);
+
+typedef int each_remote_fn(struct remote *remote, void *priv);
+
+/* iterate through struct remotes */
+int for_each_remote(each_remote_fn fn, void *priv);
+
+int remote_has_url(struct remote *remote, const char *url);
+
+struct ref {
+	struct ref *next;
+	struct object_id old_oid;
+	struct object_id new_oid;
+	struct object_id old_oid_expect; /* used by expect-old */
+	char *symref;
+	unsigned int
+		force:1,
+		forced_update:1,
+		expect_old_sha1:1,
+		exact_oid:1,
+		deletion:1;
+
+	enum {
+		REF_NOT_MATCHED = 0, /* initial value */
+		REF_MATCHED,
+		REF_UNADVERTISED_NOT_ALLOWED
+	} match_status;
+
+	/*
+	 * Order is important here, as we write to FETCH_HEAD
+	 * in numeric order. And the default NOT_FOR_MERGE
+	 * should be 0, so that xcalloc'd structures get it
+	 * by default.
+	 */
+	enum {
+		FETCH_HEAD_MERGE = -1,
+		FETCH_HEAD_NOT_FOR_MERGE = 0,
+		FETCH_HEAD_IGNORE = 1
+	} fetch_head_status;
+
+	enum {
+		REF_STATUS_NONE = 0,
+		REF_STATUS_OK,
+		REF_STATUS_REJECT_NONFASTFORWARD,
+		REF_STATUS_REJECT_ALREADY_EXISTS,
+		REF_STATUS_REJECT_NODELETE,
+		REF_STATUS_REJECT_FETCH_FIRST,
+		REF_STATUS_REJECT_NEEDS_FORCE,
+		REF_STATUS_REJECT_STALE,
+		REF_STATUS_REJECT_SHALLOW,
+		REF_STATUS_UPTODATE,
+		REF_STATUS_REMOTE_REJECT,
+		REF_STATUS_EXPECTING_REPORT,
+		REF_STATUS_ATOMIC_PUSH_FAILED
+	} status;
+	char *remote_status;
+	struct ref *peer_ref; /* when renaming */
+	char name[FLEX_ARRAY]; /* more */
+};
+
+#define REF_NORMAL	(1u << 0)
+#define REF_HEADS	(1u << 1)
+#define REF_TAGS	(1u << 2)
+
+struct ref *find_ref_by_name(const struct ref *list, const char *name);
+
+struct ref *alloc_ref(const char *name);
+struct ref *copy_ref(const struct ref *ref);
+struct ref *copy_ref_list(const struct ref *ref);
+void sort_ref_list(struct ref **, int (*cmp)(const void *, const void *));
+int count_refspec_match(const char *, struct ref *refs, struct ref **matched_ref);
+int ref_compare_name(const void *, const void *);
+
+int check_ref_type(const struct ref *ref, int flags);
+
+/*
+ * Free a single ref and its peer, or an entire list of refs and their peers,
+ * respectively.
+ */
+void free_one_ref(struct ref *ref);
+void free_refs(struct ref *ref);
+
+struct oid_array;
+struct packet_reader;
+struct argv_array;
+struct string_list;
+struct ref **get_remote_heads(struct packet_reader *reader,
+			      struct ref **list, unsigned int flags,
+			      struct oid_array *extra_have,
+			      struct oid_array *shallow_points);
+
+/* Used for protocol v2 in order to retrieve refs from a remote */
+struct ref **get_remote_refs(int fd_out, struct packet_reader *reader,
+			     struct ref **list, int for_push,
+			     const struct argv_array *ref_prefixes,
+			     const struct string_list *server_options);
+
+int resolve_remote_symref(struct ref *ref, struct ref *list);
+
+/*
+ * Remove and free all but the first of any entries in the input list
+ * that map the same remote reference to the same local reference.  If
+ * there are two entries that map different remote references to the
+ * same local reference, emit an error message and die.  Return a
+ * pointer to the head of the resulting list.
+ */
+struct ref *ref_remove_duplicates(struct ref *ref_map);
+
+int query_refspecs(struct refspec *rs, struct refspec_item *query);
+char *apply_refspecs(struct refspec *rs, const char *name);
+
+int check_push_refs(struct ref *src, struct refspec *rs);
+int match_push_refs(struct ref *src, struct ref **dst,
+		    struct refspec *rs, int flags);
+void set_ref_status_for_push(struct ref *remote_refs, int send_mirror,
+	int force_update);
+
+/*
+ * Given a list of the remote refs and the specification of things to
+ * fetch, makes a (separate) list of the refs to fetch and the local
+ * refs to store into.
+ *
+ * *tail is the pointer to the tail pointer of the list of results
+ * beforehand, and will be set to the tail pointer of the list of
+ * results afterward.
+ *
+ * missing_ok is usually false, but when we are adding branch.$name.merge
+ * it is Ok if the branch is not at the remote anymore.
+ */
+int get_fetch_map(const struct ref *remote_refs, const struct refspec_item *refspec,
+		  struct ref ***tail, int missing_ok);
+
+struct ref *get_remote_ref(const struct ref *remote_refs, const char *name);
+
+/*
+ * For the given remote, reads the refspec's src and sets the other fields.
+ */
+int remote_find_tracking(struct remote *remote, struct refspec_item *refspec);
+
+/**
+ * struct branch holds the configuration for a branch. It can be looked up with
+ * branch_get(name) for "refs/heads/{name}", or with branch_get(NULL) for HEAD.
+ */
+struct branch {
+
+	/* The short name of the branch. */
+	const char *name;
+
+	/* The full path for the branch ref. */
+	const char *refname;
+
+	/* The name of the remote listed in the configuration. */
+	const char *remote_name;
+
+	const char *pushremote_name;
+
+	/* An array of the "merge" lines in the configuration. */
+	const char **merge_name;
+
+	/**
+	 * An array of the struct refspecs used for the merge lines. That is,
+	 * merge[i]->dst is a local tracking ref which should be merged into this
+	 * branch by default.
+	 */
+	struct refspec_item **merge;
+
+	/* The number of merge configurations */
+	int merge_nr;
+
+	int merge_alloc;
+
+	const char *push_tracking_ref;
+};
+
+struct branch *branch_get(const char *name);
+const char *remote_for_branch(struct branch *branch, int *explicit);
+const char *pushremote_for_branch(struct branch *branch, int *explicit);
+const char *remote_ref_for_branch(struct branch *branch, int for_push);
+
+/* returns true if the given branch has merge configuration given. */
+int branch_has_merge_config(struct branch *branch);
+
+int branch_merge_matches(struct branch *, int n, const char *);
+
+/**
+ * Return the fully-qualified refname of the tracking branch for `branch`.
+ * I.e., what "branch@{upstream}" would give you. Returns NULL if no
+ * upstream is defined.
+ *
+ * If `err` is not NULL and no upstream is defined, a more specific error
+ * message is recorded there (if the function does not return NULL, then
+ * `err` is not touched).
+ */
+const char *branch_get_upstream(struct branch *branch, struct strbuf *err);
+
+/**
+ * Return the tracking branch that corresponds to the ref we would push to
+ * given a bare `git push` while `branch` is checked out.
+ *
+ * The return value and `err` conventions match those of `branch_get_upstream`.
+ */
+const char *branch_get_push(struct branch *branch, struct strbuf *err);
+
+/* Flags to match_refs. */
+enum match_refs_flags {
+	MATCH_REFS_NONE		= 0,
+	MATCH_REFS_ALL 		= (1 << 0),
+	MATCH_REFS_MIRROR	= (1 << 1),
+	MATCH_REFS_PRUNE	= (1 << 2),
+	MATCH_REFS_FOLLOW_TAGS	= (1 << 3)
+};
+
+/* Flags for --ahead-behind option. */
+enum ahead_behind_flags {
+	AHEAD_BEHIND_UNSPECIFIED = -1,
+	AHEAD_BEHIND_QUICK       =  0,  /* just eq/neq reporting */
+	AHEAD_BEHIND_FULL        =  1,  /* traditional a/b reporting */
+};
+
+/* Reporting of tracking info */
+int stat_tracking_info(struct branch *branch, int *num_ours, int *num_theirs,
+		       const char **upstream_name, int for_push,
+		       enum ahead_behind_flags abf);
+int format_tracking_info(struct branch *branch, struct strbuf *sb,
+			 enum ahead_behind_flags abf);
+
+struct ref *get_local_heads(void);
+/*
+ * Find refs from a list which are likely to be pointed to by the given HEAD
+ * ref. If 'all' is false, returns the most likely ref; otherwise, returns a
+ * list of all candidate refs. If no match is found (or 'head' is NULL),
+ * returns NULL. All returns are newly allocated and should be freed.
+ */
+struct ref *guess_remote_head(const struct ref *head,
+			      const struct ref *refs,
+			      int all);
+
+/* Return refs which no longer exist on remote */
+struct ref *get_stale_heads(struct refspec *rs, struct ref *fetch_map);
+
+/*
+ * Compare-and-swap
+ */
+#define CAS_OPT_NAME "force-with-lease"
+
+struct push_cas_option {
+	unsigned use_tracking_for_rest:1;
+	struct push_cas {
+		struct object_id expect;
+		unsigned use_tracking:1;
+		char *refname;
+	} *entry;
+	int nr;
+	int alloc;
+};
+
+int parseopt_push_cas_option(const struct option *, const char *arg, int unset);
+
+int is_empty_cas(const struct push_cas_option *);
+void apply_push_cas(struct push_cas_option *, struct remote *, struct ref *);
+
+#endif