/
sql.go
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/
sql.go
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// Copyright 2020 Erik Agsjö
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package letarette
import (
"embed"
"fmt"
"strings"
)
var sqlCache = map[string]string{}
func loadSearchQuery(strategy int) (string, error) {
return SQL(fmt.Sprintf("search_%d.sql", strategy))
}
//go:embed sql
var sqlFS embed.FS
// SQL loads sql code from resources and strips away comments
func SQL(path string) (string, error) {
if loaded, found := sqlCache[path]; found {
return loaded, nil
}
path = strings.TrimLeft(path, "/")
sqlAsset := fmt.Sprintf("sql/%s", path)
sql, err := sqlFS.ReadFile(sqlAsset)
if err != nil {
return "", err
}
// Strip comments to avoid name binding getting caught on the url
// in the license header (!)
lines := strings.Split(string(sql), "\n")
uncommented := []string{}
for _, line := range lines {
trimmed := strings.TrimSpace(line)
if strings.HasPrefix(trimmed, "--") {
continue
}
uncommented = append(uncommented, trimmed)
}
result := strings.Join(uncommented, "\n")
sqlCache[path] = result
return result, nil
}