syntax = "proto3";

package gitaly;

import "errors.proto";
import "google/protobuf/timestamp.proto";
import "lint.proto";
import "shared.proto";

option go_package = "gitlab.com/gitlab-org/gitaly/v16/proto/go/gitalypb";

// CommitService is a service which provides RPCs that interact with Git
// commits.
service CommitService {

  // ListCommits lists all commits reachable via a set of references by doing a
  // graph walk. This deprecates FindAllCommits and FindCommits (except Follow
  // is not yet supported). Any unknown revisions will cause the RPC to fail.
  rpc ListCommits(ListCommitsRequest) returns (stream ListCommitsResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // ListAllCommits lists all commits present in the repository, including
  // those not reachable by any reference.
  rpc ListAllCommits(ListAllCommitsRequest) returns (stream ListAllCommitsResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // CommitIsAncestor checks whether a provided commit is the ancestor of
  // another commit.
  rpc CommitIsAncestor(CommitIsAncestorRequest) returns (CommitIsAncestorResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // TreeEntry provides the tree entry for the provided path and revision. The data
  // is broken into chunks and streamed.
  rpc TreeEntry(TreeEntryRequest) returns (stream TreeEntryResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // CountCommits provides the number of commits which adhere to the given filters.
  rpc CountCommits(CountCommitsRequest) returns (CountCommitsResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // CountDivergingCommits provides the number of diverging commits between two revisions.
  rpc CountDivergingCommits(CountDivergingCommitsRequest) returns (CountDivergingCommitsResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // GetTreeEntries provides the tree entries for the provided path and revision. This includes
  // subtrees present under the tree with the option of recursive fetching.
  rpc GetTreeEntries(GetTreeEntriesRequest) returns (stream GetTreeEntriesResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // ListFiles lists all the files (including files in sub-dirs) present in the working tree
  // of a given treeish.
  rpc ListFiles(ListFilesRequest) returns (stream ListFilesResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // FindCommit finds a commit for a given commitish. Returns nil if the commit is not found.
  rpc FindCommit(FindCommitRequest) returns (FindCommitResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // CommitStats provides the stats for a given commitish.
  rpc CommitStats(CommitStatsRequest) returns (CommitStatsResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // FindAllCommits lists all the commits which can be traversed from the
  // provided commitish.
  rpc FindAllCommits(FindAllCommitsRequest) returns (stream FindAllCommitsResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // FindCommits lists all the commits which are associated with the provided revision
  // and paths.
  rpc FindCommits(FindCommitsRequest) returns (stream FindCommitsResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // CommitLanguages detects the source code languages of the whole tree for a
  // given commit. Returns an error in case no languages could be detected.
  rpc CommitLanguages(CommitLanguagesRequest) returns (CommitLanguagesResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // RawBlame blames lines in a blob to when they have last been changed. Returns the raw output of the git-blame(1)
  // command.
  rpc RawBlame(RawBlameRequest) returns (stream RawBlameResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // LastCommitForPath returns the last commit that has changed a given path.
  //
  // The following special cases apply and have grown historically:
  //
  // - Absolute paths that or relative paths that escape the repository root will cause an error.
  // - A nonexistent path inside the repository leads to a successful but empty response.
  rpc LastCommitForPath(LastCommitForPathRequest) returns (LastCommitForPathResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // ListLastCommitsForTree lists the last commits for a given tree.
  rpc ListLastCommitsForTree(ListLastCommitsForTreeRequest) returns (stream ListLastCommitsForTreeResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // CommitsByMessage list commits which match the provided query.
  rpc CommitsByMessage(CommitsByMessageRequest) returns (stream CommitsByMessageResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // ListCommitsByOid lists the commits for the provided commitish object IDs.
  rpc ListCommitsByOid(ListCommitsByOidRequest) returns (stream ListCommitsByOidResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // ListCommitsByRefName lists the commits for the provided references.
  rpc ListCommitsByRefName(ListCommitsByRefNameRequest) returns (stream ListCommitsByRefNameResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // FilterShasWithSignatures filters out signed commits.
  rpc FilterShasWithSignatures(stream FilterShasWithSignaturesRequest) returns (stream FilterShasWithSignaturesResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // GetCommitSignatures parses the commit signature information for the provided commitish object IDs.
  rpc GetCommitSignatures(GetCommitSignaturesRequest) returns (stream GetCommitSignaturesResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // GetCommitMessages returns the commits messages for the provided commitish object IDs.
  rpc GetCommitMessages(GetCommitMessagesRequest) returns (stream GetCommitMessagesResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

  // CheckObjectsExist will check for the existence of revisions against a
  // repository. It returns two sets of data. An array containing the revisions
  // from the input that it found on the repository, and an array that contains all
  // revisions from the input it did not find on the repository.
  rpc CheckObjectsExist(stream CheckObjectsExistRequest) returns (stream CheckObjectsExistResponse) {
    option (op_type) = {
      op: ACCESSOR
    };
  }

}

// ListCommitsRequest is a request for the ListCommits RPC.
message ListCommitsRequest {
  // Order is the order in which commits should be traversed.
  enum Order {
    // NONE defaults to reverse chronological order.
    NONE = 0; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX ENUM_FIELD_NAMES_ZERO_VALUE_END_WITH
    // TOPO order will cause no parents to be shown before all of its children
    // are shown. Furthermore, multiple lines of history will not be
    // intermixed.
    TOPO = 1; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX
    // DATE order will cause no parents to be shown before all of its children
    // are shown. Otherwise, commits are shown in commit timestamp order. This
    // can cause history to be shown intermixed.
    DATE = 2; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX
  };

  // repository is the repository in which commits should be searched for.
  Repository repository = 1 [(target_repository)=true];

  // revisions is the set of revisions which should be walked to enumerate
  // commits. Accepts all notation as documented in gitrevisions(7) as well as
  // the pseudo-revisions `--not` and `--all` as documented in git-rev-list(1).
  // Must not be empty.
  repeated string revisions = 2;

  // pagination_params controls paging. Refer to PaginationParameter documentation for
  // further info.
  PaginationParameter pagination_params = 3;

  // order is the order in which commits should be traversed. Please refer to
  // the enum's documentation for further information.
  Order order = 4;

  // reverse will cause all commits to be listed in reverse.
  bool reverse = 11;

  // max_parents will skip all commits which have more than the specified number
  // of parents. If set to `0`, no filtering by parents will happen. If set to
  // `1`, all merge commits will be omitted.
  uint32 max_parents = 5;

  // disable_walk will disable walking the graph. As a result, only commits
  // which are immediately referenced by Revisions will be returned.
  bool disable_walk = 6;

  // first_parent will cause the graph walk to only go down the first-parent
  // chain of commits. Merge commits will thus only cause the mainline to be
  // enumerated.
  bool first_parent = 7;

  // after will only list commits which are more recent than the specified date.
  google.protobuf.Timestamp after = 8;

  // before will only list commits which are older than the specified date.
  google.protobuf.Timestamp before = 9;

  // author will only list commits whose author matches the given pattern,
  // which is a regular expression.
  bytes author = 10;

  // ignore_case will apply case-sensitive behaviour while regex matching.
  bool ignore_case = 12;

  // commit_message_patterns will only list commits whose commit message matches
  // any of the given patterns.
  repeated bytes commit_message_patterns = 13;
}

// ListCommitsResponse is a response for the ListCommits RPC. The response will be
// chunked into multiple message if the returned data exceeds gRPC message limits.
message ListCommitsResponse {
  // commits is the list of commits found.
  repeated GitCommit commits = 1;
}

// ListAllCommitsRequest is a request for the ListAllCommits RPC.
message ListAllCommitsRequest {
  // repository is the repository in which commits should be searched for.
  Repository repository = 1 [(target_repository)=true];

  // pagination_params controls paging. Refer to PaginationParameter documentation for
  // further info.
  PaginationParameter pagination_params = 2;
}

// ListAllCommitsResponse is a response for the ListAllCommits RPC. The response will be
// chunked into multiple message if the returned data exceeds gRPC message limits.
message ListAllCommitsResponse {
  // commits is the list of commits found.
  repeated GitCommit commits = 1;
}


// CommitStatsRequest is the request for the CommitStats RPC.
message CommitStatsRequest {
  // repository is the repository in which the commit is present.
  Repository repository = 1 [(target_repository)=true];
  // revision is a commitish for which we want to get the stats.
  bytes revision = 2;
}

// CommitStatsResponse is the request for the CommitStats RPC.
message CommitStatsResponse {
  // oid is the commit object ID. It is empty if the commit is not found.
  string oid = 1;
  // additions refers to the number of lines added in the commit.
  int32 additions = 2;
  // deletions refers to the number of lines deleted in the commit.
  int32 deletions = 3;
}

// CommitIsAncestorRequest is the request for the CommitIsAncestor RPC.
message CommitIsAncestorRequest {
  // repository is the repository for which we need to check the ancestry.
  Repository repository = 1 [(target_repository)=true];
  // ancestor_id is the object ID of the commit which needs to be checked as ancestor.
  string ancestor_id = 2;
  // child_id is the object ID of the commit whose ancestor needs to be confirmed.
  string child_id = 3;
}

// CommitIsAncestorResponse is the response for the CommitIsAncestor RPC.
message CommitIsAncestorResponse {
  // value denotes whether the provided commit is the ancestor or not.
  bool value = 1;
}

// TreeEntryRequest is a request for the TreeEntry RPC.
message TreeEntryRequest {
  // repository is the repository for which to read the tree entry.
  Repository repository = 1 [(target_repository)=true];
  // revision is the commitish at which the tree entry is to be read.
  bytes revision = 2;
  // path is the path of the entry that shall be read, relative to the tree of the specified revision.
  bytes path = 3;
  // limit is the maximum number of bytes to fetch. If object is bigger, remaining bytes are not sent
  // 0 means there is no limit.
  int64 limit = 4;
  // max_size is the maximum allowed object size. If bigger, a FailedPrecondition error is returned
  // 0 means there is no maximum size.
  int64 max_size = 5;
}

// TreeEntryResponse is a response for the TreeEntry RPC. The response will be
// chunked into multiple message if the returned data exceeds gRPC message limits.
message TreeEntryResponse {
  // ObjectType is the type of the returned tree entry.
  //
  // TODO: Replace this enum with ObjectType in shared.proto
  enum ObjectType {
    // COMMIT indicates that the tree entry is a commit, which may be the case for submodules.
    COMMIT = 0; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX ENUM_FIELD_NAMES_ZERO_VALUE_END_WITH
    // BLOB indicates that the tree entry is a blob.
    BLOB = 1; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX
    // TREE indicates that the tree entry is a tree, which may be the case for subdirectories.
    TREE = 2; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX
    // TAG indicates that the tree entry is a tag. This case should never happen.
    TAG = 3; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX
  }

  // type is the object type of the tree entry.
  ObjectType type = 1;
  // oid is the object ID of the tree entry. In case of submodules, it contains the commit ID that the submodule
  // currently refers to.
  string oid = 2;
  // size is the size of the tree entry.
  int64 size = 3;
  // mode is the mode of the tree entry.
  int32 mode = 4;
  // data contains the raw object contents. This data may be split up across multiple messages.
  bytes data = 5;
}

// CountCommitsRequest is the request for the CountCommits RPC.
message CountCommitsRequest {
  // repository is the repository in which we want to count the number of commits.
  Repository repository = 1 [(target_repository)=true];
  // revision is a commitish which is the start point for the traversal of commits.
  bytes revision = 2;
  // after is used to filter commits more recent than a specific date.
  google.protobuf.Timestamp after = 3;
  // before is used to filter commits older than a specific date.
  google.protobuf.Timestamp before = 4;
  // path is used to filter commits which modify the provided path.
  bytes path = 5;
  // max_count is used to cap the number of commits.
  int32 max_count = 6;
  // all is used to consider all refs (including HEAD) as the start point for the traversal.
  // all and Revision options are mutually exclusive.
  bool all = 7;
  // first_parent ensures that only the first parent commit is followed in the traversal.
  bool first_parent = 8;
  // global_options contains the global options used to modify the behaviour of Git.
  GlobalOptions global_options = 9;
}

// CountCommitsResponse is the response for the CountCommits RPC.
message CountCommitsResponse {
  // count denotes the number of commits found as per the given filters.
  int32 count = 1;
}

// CountDivergingCommitsRequest is the request for the CountDivergingCommits RPC.
message CountDivergingCommitsRequest {
  // repository is the repository in which we want to find the number of diverging commits.
  Repository repository = 1 [(target_repository)=true];
  // from is the object ID of one of the commits against which we want to check the
  // number of diverging commits. The From and To fields are interchangeable.
  bytes from = 2;
  // to is the object ID of one of the commits against which we want to check the
  // number of diverging commits. The To and From fields are interchangeable.
  bytes to = 3;
  reserved 4;
  reserved 5;
  reserved 6;
  // max_count denotes the cap for the number of diverging commits to be reported.
  int32 max_count = 7;
}

// CountDivergingCommitsResponse is the response for the CountDivergingCommits RPC.
message CountDivergingCommitsResponse {
  // left_count denotes the number of diverging commits present in the 'From' commit provided.
  int32 left_count = 1;
  // right_count denotes the number of diverging commits present in the 'To' commit provided.
  int32 right_count = 2;
}

// TreeEntry denotes a single tree entry.
message TreeEntry {
  // EntryType denotes the different types of tree entry.
  enum EntryType {
    // BLOB indicates that the tree entry is a blob.
    BLOB = 0; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX ENUM_FIELD_NAMES_ZERO_VALUE_END_WITH
    // TREE indicates that the tree entry is a tree, which may be the case for subdirectories.
    TREE = 1; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX
    // COMMIT indicates that the tree entry is a commit, which may be the case for submodules.
    COMMIT = 3; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX
  }

  // oid of the object this tree entry points to.
  string oid = 1;
  // path is the path of the entry relative to the tree of the specified revision.
  bytes path = 3;
  // type denotes the type of the tree entry.
  EntryType type = 4;
  // mode is the mode of the tree entry.
  int32 mode = 5;
  // commit_oid is the commit object via which this entry was retrieved.
  string commit_oid = 6;
  // flat_path is the relative path of the first subdir that doesn't have only one directory descendant.
  bytes flat_path = 7;

  // RootOid used to refer to the resolved object ID of the root tree. This field has been removed
  // with no replacement.
  reserved "root_oid";
  reserved 2;
}

// GetTreeEntriesRequest is the request for the GetTreeEntries RPC.
message GetTreeEntriesRequest {
  // SortBy provides the sorting parameters.
  enum SortBy {
    // DEFAULT preserves the order of git ls-tree.
    DEFAULT = 0; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX ENUM_FIELD_NAMES_ZERO_VALUE_END_WITH
    // TREES_FIRST sorts the entries by trees, blobs and submodules.
    TREES_FIRST = 1; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX
  }

  // repository is the repository to get the tree entries from.
  Repository repository = 1 [(target_repository)=true];
  // revision is the commitish at which the tree entries is to be read.
  bytes revision = 2;
  // path is the path of the entry that shall be read, relative to the tree of the specified revision.
  bytes path = 3;
  // recursive denotes wether to recursively fetch sub-trees.
  bool recursive = 4;
  // sort defines the sorting parameter.
  SortBy sort = 5;
  // pagination_params controls paging. Refer to PaginationParameter documentation for
  // further info.
  PaginationParameter pagination_params = 6;
  // skip_flat_paths is an option to skip the expensive operation of populating flat paths.
  bool skip_flat_paths = 7;
}

// GetTreeEntriesResponse is the response for the GetTreeEntries RPC. The response will be
// chunked into multiple message if the returned data exceeds gRPC message limits.
message GetTreeEntriesResponse {
  // entries denotes a list of tree entries.
  repeated TreeEntry entries = 1;
  // pagination_cursor defines the offset for subsequent requests. Refer to PaginationCursor
  // documentation for further info.
  PaginationCursor pagination_cursor = 2;
}

// GetTreeEntriesError may be returned when GetTreeEntries fails with a specific root
// cause.
message GetTreeEntriesError {
  oneof error {
    // resolve_tree is set when the provided revision ID could not be resolved.
    ResolveRevisionError resolve_tree = 1;
    // path is set when the provided path is not valid.
    PathError path = 2;
  }
}

// ListFilesRequest is the request for the ListFiles RPC.
message ListFilesRequest {
  // repository is the repository to list the files from.
  Repository repository = 1 [(target_repository)=true];
  // revision is a commitish against which we list all files.
  bytes revision = 2;
}

// ListFilesResponse is the response for the ListFiles RPC. The response will be
// chunked into multiple message if the returned data exceeds gRPC message limits.
message ListFilesResponse {
  // paths is the list of paths found for the requested revision. Clients must
  // remember to force utf-8 encoding.
  repeated bytes paths = 1;
}

// FindCommitRequest is the request for the FindCommit RPC.
message FindCommitRequest {
  // repository is the repository in which we want to find the commit.
  Repository repository = 1 [(target_repository)=true];
  // revision is a commitish which is to be resolved to a commit.
  bytes revision = 2;
  // trailers if set, parses and adds the trailing information of the commit.
  bool trailers = 3;
}

// FindCommitResponse is the request for the FindCommit RPC. Returns empty response
// if the commit is not found.
message FindCommitResponse {
  // commit is the requested commit, it is nil when the commit was not found.
  GitCommit commit = 1;
}

// ListCommitsByOidRequest is the request for the ListCommitsByOid RPC.
message ListCommitsByOidRequest {
  // repository is the repository to list commits from.
  Repository repository = 1 [(target_repository)=true];
  // oid is a set of commitish object IDs to list commits for.
  // If there is no commit against a provided object ID, no error is thrown. It is simply ignored.
  repeated string oid = 2; // protolint:disable:this REPEATED_FIELD_NAMES_PLURALIZED
}

// ListCommitsByOidResponse is the response for the ListCommitsByOid RPC.
message ListCommitsByOidResponse {
  // commits are the list of commits for the provided object IDs from the request.
  repeated GitCommit commits = 1;
}

// ListCommitsByRefNameRequest is the request for the ListCommitsByRefName RPC.
message ListCommitsByRefNameRequest {
  // repository is the repository to list commits from.
  Repository repository = 1 [(target_repository)=true];
  // ref_names is a set of references to obtain commits for.
  // If there is no commit against a provided reference, no error is thrown. It is simply ignored.
  repeated bytes ref_names = 2;
}

// ListCommitsByRefNameResponse is the response for the ListCommitsByRefName RPC.
message ListCommitsByRefNameResponse {
  reserved 1;

  // CommitForRef holds the commit for a given reference.
  message CommitForRef {
    // commit is the commit object against the reference.
    GitCommit commit = 1;
    // ref_name is a reference from the repository.
    bytes ref_name = 2;
  }

  // commit_refs is a list of CommitForRef objects which provides the commits
  // against the requested references.
  repeated CommitForRef commit_refs = 2;
}

// FindAllCommitsRequest is the request for the FindAllCommits RPC.
message FindAllCommitsRequest {
  // Order is the order in which commits should be traversed.
  enum Order {
    // NONE denotes the default ordering where the commits are shown in
    // reverse chronological order.
    NONE = 0; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX ENUM_FIELD_NAMES_ZERO_VALUE_END_WITH
    // TOPO order will cause no parents to be shown before all of its children
    // are shown. Furthermore, multiple lines of history will not be
    // intermixed.
    TOPO = 1; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX
    // DATE order will cause no parents to be shown before all of its children
    // are shown. Otherwise, commits are shown in commit timestamp order. This
    // can cause history to be shown intermixed.
    DATE = 2; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX
  }

  // repository is the repository from which we will list the commits.
  Repository repository = 1 [(target_repository)=true];
  // revision is the commitish which is the starting point for the traversal. When nil,
  // return all commits reachable by any branch in the repo.
  bytes revision = 2;
  // max_count is the maximum number of commits to list.
  int32 max_count = 3;
  // skip is the number of commits to skip before starting to show the
  // commit output.
  int32 skip = 4;
  // order is the order in which commits should be traversed. Refer to
  // the enum's documentation for further information.
  Order order = 5;
}

// FindAllCommitsResponse is the response for the FindAllCommits RPC. The response will be
// chunked into multiple message if the returned data exceeds gRPC message limits.
message FindAllCommitsResponse {
  // commits is a list of commits produced as per the request.
  repeated GitCommit commits = 1;
}

// FindCommitsRequest is the request for the FindCommits RPC.
message FindCommitsRequest {
  // Order is the order in which commits should be traversed.
  enum Order {
    // NONE defaults to reverse chronological order.
    NONE = 0; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX ENUM_FIELD_NAMES_ZERO_VALUE_END_WITH
    // TOPO order will cause no parents to be shown before all of its children
    // are shown. Furthermore, multiple lines of history will not be
    // intermixed.
    TOPO = 1; // protolint:disable:this ENUM_FIELD_NAMES_PREFIX
  }

  // repository is the repository from which the commits are listed.
  Repository repository = 1 [(target_repository)=true];
  // revision is a commitish against which the commits for the provided
  // paths are listed. If there is no revision provided, the default branch
  // is considered. It is mutually exclusive with the `All` option.
  bytes revision = 2;
  // limit is maximum number of commits to list.
  int32 limit = 3;
  // offset is the number of commits to skip before starting the traversal.
  int32 offset = 4;
  // paths is a list of non-empty paths for which we want to list commits.
  repeated bytes paths = 5;
  // follow is used to list the history of a file beyond renames (works only for
  // a single file).
  bool follow = 6;
  // skip_merges is used to skip merge commits.
  bool skip_merges = 7;
  // disable_walk is no longer supported.
  bool disable_walk = 8 [deprecated = true];
  // after will only list commits which are more recent than the specified date.
  google.protobuf.Timestamp after = 9;
  // before will only list commits which are older than the specified date.
  google.protobuf.Timestamp before = 10;
  // all is used to consider all refs (including HEAD) as the start point for the traversal.
  // `all` and `revision` options are mutually exclusive.
  bool all = 11;
  // first_parent ensures that only the first parent commit is followed in the traversal.
  bool first_parent = 12;
  // author will only list commits whose author matches the given pattern,
  // which is a regular expression.
  bytes author = 13;
  // order is the order in which commits should be traversed. Please refer to
  // the enum's documentation for further information.
  Order order = 14;
  // global_options contains the global options used to modify the behaviour of Git.
  GlobalOptions global_options = 15;
  // trailers if set, parses and adds the trailing information of the commit.
  bool trailers = 16;
  // include_shortstat determines whether to include the number of lines and files
  // changed in the commits. Populates the `ShortStats` field.
  bool include_shortstat = 17;
  // include_referenced_by determines whether to include references that point to a
  // commit in the response. The field contains patterns that are matched against
  // references. Only matching references are included in the response. For
  // example, one can get tags pointing to a commit with `refs/tags`, or branches
  // respectively with `refs/heads`. By sending both, the response will include all
  // references that match either pattern.
  repeated bytes include_referenced_by = 18; // protolint:disable:this REPEATED_FIELD_NAMES_PLURALIZED
}

// FindCommitsResponse is the response for the FindCommits RPC. The response will be
// chunked into multiple message if the returned data exceeds gRPC message limits.
message FindCommitsResponse {
  // commits is a list of commits produced as per the request.
  repeated GitCommit commits = 1;
}

// FindCommitsError is an error returned by the FindCommits RPC when no commit is found.
message FindCommitsError {

  // error denotes the type of error encountered.
  oneof error {
    // bad_object is returned when the revision cannot be found in the git repository.
    BadObjectError bad_object = 1;
    // ambiguous_ref is returned when the given revision cannot be found.
    AmbiguousReferenceError ambiguous_ref = 2;
    // invalid_range is returned when the provided revision-range cannot be found in the git repository.
    InvalidRevisionRange invalid_range = 3;
  }
}

// CommitLanguagesRequest requests to detect the source code languages.
message CommitLanguagesRequest {
  // repository is the repository where to detect the languages in.
  Repository repository = 1 [(target_repository)=true];
  // revision tells for which commitish the languages should be detected. If it's
  // omitted, the HEAD commit of the default branch is used.
  bytes revision = 2;
}

// CommitLanguagesResponse returns the language statistics.
message CommitLanguagesResponse {
  // Language specifies the statistics for one language.
  message Language {
    // name is the name of the detected language, for example: Ruby, Go, HTML
    // A full list of language names can be found at:
    // https://github.com/github/linguist/blob/master/lib/linguist/languages.yml
    string name = 1;
    // share is the percentual share (value between 0 and 100) of this language
    // in relation to other languages that exist in the given revision.
    float share = 2;
    // color specifies the associated color for this language, for example #3fd5e0.
    string color = 3;
    // FileCount was a uint32 that stored how many files with this language were found.
    // However, it was never used and there is no client demand for it.
    // See: https://gitlab.com/gitlab-org/gitaly/-/issues/4293.
    reserved 4;
    reserved "file_count";
    // bytes is the total amount of bytes written in this language
    uint64 bytes = 5;
  }

  // languages is a set of all the detected languages and their statistics.
  repeated Language languages = 1;
}

// RawBlameRequest is a request for the RawBlame RPC.
message RawBlameRequest {
  // repository is the repository to perform the blame on.
  Repository repository = 1 [(target_repository)=true];
  // revision is the commitish at which to start the blame.
  bytes revision = 2;
  // path is the path of the blob that should be blamed.
  bytes path = 3;
  // range is the comma-separated range of line numbers to perform the blame on, e.g. "1,1000". Optional - if no range
  // is provided, the whole file will be blamed.
  bytes range = 4;
}

// RawBlameResponse is a response for the RawBlame RPC. The response will be
// chunked into multiple message if the returned data exceeds gRPC message limits.
message RawBlameResponse {
  // data is the raw data as generated by git-blame(1).
  bytes data = 1;
}

// RawBlameError is used as error detail when the RawBlame RPC fails in a specific way.
message RawBlameError {
  // OutOfRangeError indicates that the specified file range that is to be blamed exceeds the length of the blamed
  // file.
  message OutOfRangeError {
    // actual_lines contains the actual number of lines that can be blamed in the file.
    uint64 actual_lines = 1;
  }

  // error denotes the type of error encountered.
  oneof error {
    // path_not_found is returned when the blamed path cannot be found in the revision.
    PathNotFoundError path_not_found = 1;
    // out_of_range is returned when the specified blamed range exceeds the file length.
    OutOfRangeError out_of_range = 2;
  }
}

// LastCommitForPathRequest is a request for the LastCommitForPath RPC.
message LastCommitForPathRequest {
  // repository is the repository to run the query in.
  Repository repository = 1 [(target_repository)=true];
  // revision is the commitish that is used as the start commit to perform the search.
  bytes revision = 2;
  // path is the path for which the last commit should be searched. This path can either point to a blob or to a
  // tree. The path must be relative and must not escape the repository root. If the path is empty or "/", then the
  // repository root will be searched instead.
  bytes path = 3;
  // literal_pathspec will treat the path literally. No globbing or pathspec magic is performed. This option is
  // deprecated in favor of GlobalOptions.
  bool literal_pathspec = 4;
  // global_options contains the global options used to modify the behaviour of Git.
  GlobalOptions global_options = 5;
}

// LastCommitForPathResponse is a response for the LastCommitForPath RPC.
message LastCommitForPathResponse {
  // commit is the commit that has last modified the given path. Unset in case the path could not be found.
  GitCommit commit = 1;
}

// ListLastCommitsForTreeRequest is the request for the ListLastCommitsForTree RPC.
message ListLastCommitsForTreeRequest {
  // repository is the repository to run the query in.
  Repository repository = 1 [(target_repository)=true];
  // revision is the treeish to retrieve commits against.
  string revision = 2;
  // path is the relative path to further filter against the treeish revision. This path can either point to a blob
  // or to a tree. The path must be relative and must not escape the repository root. If the path is empty or "/", then
  // it will be replaced with the root of of the repository.
  bytes path = 3;
  // limit is the number of tree entries to limit the response to.
  int32 limit = 4;
  // offset is the offset of the tree entries from which to start the response.
  int32 offset = 5;
  // literal_pathspec is deprecated.
  bool literal_pathspec = 6 [deprecated = true];
  // global_options contains the global options used to modify the behaviour of Git.
  GlobalOptions global_options = 7;
}

// ListLastCommitsForTreeResponse is the response for the ListLastCommitsForTree RPC.
message ListLastCommitsForTreeResponse {
  // CommitForTree denotes the last commit for associated path.
  message CommitForTree {
    reserved 1;

    // commit is the commit that has last modified the path.
    GitCommit commit = 2;
    reserved 3;
    // path_bytes is the path associated with the commit.
    bytes path_bytes = 4;
  }

  // commits is a set of CommitForTree objects.
  repeated CommitForTree commits = 1;
}

// CommitsByMessageRequest is the request for the CommitsByMessage RPC.
message CommitsByMessageRequest {
  // repository is the repository to run the query in.
  Repository repository = 1 [(target_repository)=true];
  // revision is the commitish to retrieve commits against.
  bytes revision = 2;
  // offset is the offset from which to list commits.
  int32 offset = 3;
  // limit is the maximum number of commits to list.
  int32 limit = 4;
  // path is the relative path to filter the commits to.
  bytes path = 5;
  // query is the search param to search commit messages against.
  string query = 6;
  // global_options contains the global options used to modify the behaviour of Git.
  GlobalOptions global_options = 7;
}

// CommitsByMessageResponse is the response for the CommitsByMessage RPC.
// One 'page' of the paginated response of CommitsByMessage.
message CommitsByMessageResponse {
  // commits is the list of commits which match the query from the request.
  repeated GitCommit commits = 1;
}

// FilterShasWithSignaturesRequest is the request for the FilterShasWithSignatures RPC.
message FilterShasWithSignaturesRequest {
  // repository is the repository to retrieve the commits from.
  Repository repository = 1 [(target_repository)=true];
  // shas is a set of commitish object IDs. If there is no corresponding commit for a
  // provided sha, no error will be thrown. Only signed commits will be returned in the
  // response.
  repeated bytes shas = 2;
}

// FilterShasWithSignaturesResponse is the response for the FilterShasWithSignatures RPC.
message FilterShasWithSignaturesResponse {
  // shas is the filtered list of shas from the request which have an associated signed
  // commit.
  repeated bytes shas = 1;
}

// GetCommitSignaturesRequest is the request for the GetCommitSignatures RPC.
message GetCommitSignaturesRequest {
  // repository is the repository to retrieve the commits from.
  Repository repository = 1 [(target_repository)=true];
  // commit_ids is the list of commitish object IDs for whom we want to retrieve
  // signature information. If a commit doesn't have associated signature information
  // it will be omitted from the results.
  repeated string commit_ids = 2;
}

// GetCommitSignaturesResponse is the response for the GetCommitSignatures RPC.
message GetCommitSignaturesResponse {
  // Signer of the commit. A commit can be signed either by a user or by Gitaly itself.
  enum Signer {
    // SIGNER_UNSPECIFIED indicates that the signer has not been specified.
    SIGNER_UNSPECIFIED = 0;
    // SIGNER_USER indicates that the commit has been signed by a user.
    SIGNER_USER = 1;
    // SIGNER_SYSTEM indicates that the commit has been signed by Gitaly itself.
    SIGNER_SYSTEM = 2;
  }

  // commit_id of the signature.
  string commit_id = 1;
  // signature of the commit (GPG or SSH).
  bytes signature = 2;
  // signed_text is text that is used to verify the signature.
  bytes signed_text = 3;
  // signer of the commit
  Signer signer = 4;
}

// GetCommitMessagesRequest is the request for the GetCommitMessages RPC.
message GetCommitMessagesRequest {
  // repository is the repository to retrieve the commits from.
  Repository repository = 1 [(target_repository)=true];
  // commit_ids is the list of commitish object IDs for whom we want to retrieve
  // the commit message.
  repeated string commit_ids = 2;
}

// GetCommitMessagesResponse is the response for the GetCommitMessages RPC.
message GetCommitMessagesResponse {
  // commit_id is the commit object ID. A response with commit_id set, will be followed with
  // response with the message field set with the commit message for that commit.
  string commit_id = 1;
  // message is the commit message for the commit.
  bytes message = 2;
}

// CheckObjectsExistRequest is a request for the CheckObjectsExist RPC.
message CheckObjectsExistRequest {
  // repository is the repository in which existence of objects and refs
  // are checked. Only the initial request must contain a repository, the repository of all
  // subsequent requests will be ignored.
  Repository repository = 1 [(target_repository)=true];
  // revisions contains the revisions that shall be checked for existence. This accepts all revisions
  // as documented in gitrevisions(7).
  repeated bytes revisions = 2;
}

// CheckObjectsExistResponse is a response for the CheckObjectsExist RPC.
message CheckObjectsExistResponse {
  // RevisionExistence lists a revision with information about its existence.
  message RevisionExistence {
    // name refers to the revision.
    bytes name = 1;
    // exists is true if the revision exists in the repository.
    bool exists = 2;
  };

  // revisions is the list of RevisionExistence objects used to indicate which
  // revisions exist.
  repeated RevisionExistence revisions = 1;
}