161 lines
3.9 KiB
Go
161 lines
3.9 KiB
Go
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// Copyright 2019 clair authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package ancestry
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import (
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"database/sql"
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"errors"
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log "github.com/sirupsen/logrus"
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"github.com/coreos/clair/database"
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"github.com/coreos/clair/database/pgsql/detector"
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"github.com/coreos/clair/database/pgsql/layer"
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"github.com/coreos/clair/database/pgsql/util"
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)
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const (
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insertAncestry = `
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INSERT INTO ancestry (name) VALUES ($1) RETURNING id`
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findAncestryID = `SELECT id FROM ancestry WHERE name = $1`
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removeAncestry = `DELETE FROM ancestry WHERE name = $1`
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insertAncestryFeatures = `
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INSERT INTO ancestry_feature
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(ancestry_layer_id, namespaced_feature_id, feature_detector_id, namespace_detector_id) VALUES
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($1, $2, $3, $4)`
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)
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func FindAncestry(tx *sql.Tx, name string) (database.Ancestry, bool, error) {
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var (
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ancestry = database.Ancestry{Name: name}
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err error
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)
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id, ok, err := FindAncestryID(tx, name)
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if !ok || err != nil {
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return ancestry, ok, err
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}
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if ancestry.By, err = FindAncestryDetectors(tx, id); err != nil {
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return ancestry, false, err
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}
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if ancestry.Layers, err = FindAncestryLayers(tx, id); err != nil {
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return ancestry, false, err
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}
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return ancestry, true, nil
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}
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func UpsertAncestry(tx *sql.Tx, ancestry database.Ancestry) error {
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if !ancestry.Valid() {
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return database.ErrInvalidParameters
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}
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if err := RemoveAncestry(tx, ancestry.Name); err != nil {
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return err
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}
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id, err := InsertAncestry(tx, ancestry.Name)
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if err != nil {
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return err
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}
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detectorIDs, err := detector.FindDetectorIDs(tx, ancestry.By)
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if err != nil {
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return err
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}
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// insert ancestry metadata
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if err := InsertAncestryDetectors(tx, id, detectorIDs); err != nil {
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return err
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}
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layers := make([]string, 0, len(ancestry.Layers))
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for _, l := range ancestry.Layers {
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layers = append(layers, l.Hash)
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}
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layerIDs, ok, err := layer.FindLayerIDs(tx, layers)
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if err != nil {
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return err
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}
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if !ok {
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log.Error("layer cannot be found, this indicates that the internal logic of calling UpsertAncestry is wrong or the database is corrupted.")
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return database.ErrMissingEntities
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}
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ancestryLayerIDs, err := InsertAncestryLayers(tx, id, layerIDs)
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if err != nil {
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return err
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}
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for i, id := range ancestryLayerIDs {
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if err := InsertAncestryFeatures(tx, id, ancestry.Layers[i]); err != nil {
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return err
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}
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}
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return nil
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}
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func InsertAncestry(tx *sql.Tx, name string) (int64, error) {
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var id int64
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err := tx.QueryRow(insertAncestry, name).Scan(&id)
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if err != nil {
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if util.IsErrUniqueViolation(err) {
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return 0, util.HandleError("insertAncestry", errors.New("other Go-routine is processing this ancestry (skip)"))
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}
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return 0, util.HandleError("insertAncestry", err)
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}
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return id, nil
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}
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func FindAncestryID(tx *sql.Tx, name string) (int64, bool, error) {
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var id sql.NullInt64
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if err := tx.QueryRow(findAncestryID, name).Scan(&id); err != nil {
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if err == sql.ErrNoRows {
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return 0, false, nil
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}
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return 0, false, util.HandleError("findAncestryID", err)
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}
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return id.Int64, true, nil
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}
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func RemoveAncestry(tx *sql.Tx, name string) error {
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result, err := tx.Exec(removeAncestry, name)
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if err != nil {
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return util.HandleError("removeAncestry", err)
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}
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affected, err := result.RowsAffected()
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if err != nil {
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return util.HandleError("removeAncestry", err)
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}
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if affected != 0 {
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log.WithField("ancestry", name).Debug("removed ancestry")
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}
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return nil
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}
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