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// Copyright 2022 Google Inc. All rights reserved.
//
// 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 starlark_fmt
import (
"fmt"
"sort"
"strings"
)
const (
indent = 4
)
// Indention returns an indent string of the specified level.
func Indention(level int) string {
if level < 0 {
panic(fmt.Errorf("indent level cannot be less than 0, but got %d", level))
}
return strings.Repeat(" ", level*indent)
}
// PrintBool returns a Starlark compatible bool string.
func PrintBool(item bool) string {
return strings.Title(fmt.Sprintf("%t", item))
}
// PrintsStringList returns a Starlark-compatible string of a list of Strings/Labels.
func PrintStringList(items []string, indentLevel int) string {
return PrintList(items, indentLevel, func(s string) string {
if strings.Contains(s, "\"") {
return `'''%s'''`
}
return `"%s"`
})
}
// PrintList returns a Starlark-compatible string of list formmated as requested.
func PrintList(items []string, indentLevel int, formatString func(string) string) string {
if len(items) == 0 {
return "[]"
} else if len(items) == 1 {
return fmt.Sprintf("["+formatString(items[0])+"]", items[0])
}
list := make([]string, 0, len(items)+2)
list = append(list, "[")
innerIndent := Indention(indentLevel + 1)
for _, item := range items {
list = append(list, fmt.Sprintf(`%s`+formatString(item)+`,`, innerIndent, item))
}
list = append(list, Indention(indentLevel)+"]")
return strings.Join(list, "\n")
}
// PrintStringListDict returns a Starlark-compatible string formatted as dictionary with
// string keys and list of string values.
func PrintStringListDict(dict map[string][]string, indentLevel int) string {
formattedValueDict := make(map[string]string, len(dict))
for k, v := range dict {
formattedValueDict[k] = PrintStringList(v, indentLevel+1)
}
return PrintDict(formattedValueDict, indentLevel)
}
// PrintBoolDict returns a starlark-compatible string containing a dictionary with string keys and
// values printed with no additional formatting.
func PrintBoolDict(dict map[string]bool, indentLevel int) string {
formattedValueDict := make(map[string]string, len(dict))
for k, v := range dict {
formattedValueDict[k] = PrintBool(v)
}
return PrintDict(formattedValueDict, indentLevel)
}
// PrintDict returns a starlark-compatible string containing a dictionary with string keys and
// values printed with no additional formatting.
func PrintDict(dict map[string]string, indentLevel int) string {
if len(dict) == 0 {
return "{}"
}
items := make([]string, 0, len(dict))
for k, v := range dict {
items = append(items, fmt.Sprintf(`%s"%s": %s,`, Indention(indentLevel+1), k, v))
}
sort.Strings(items)
return fmt.Sprintf(`{
%s
%s}`, strings.Join(items, "\n"), Indention(indentLevel))
}
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