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|
package git
import (
"bytes"
"errors"
"fmt"
"strconv"
"strings"
)
// ConfigEntry represents an entry in the gitconfig.
type ConfigEntry struct {
// Key is the entry's key, with any common `prefix` removed (see
// `Config()`).
Key string
// Value is the entry's value, as a string.
Value string
}
// Config represents the gitconfig, or part of the gitconfig, read by
// `ReadConfig()`.
type Config struct {
// Prefix is the key prefix that was read to fill this `Config`.
Prefix string
// Entries contains the configuration entries that matched
// `Prefix`, in the order that they are reported by `git config
// --list`.
Entries []ConfigEntry
}
// GetConfig returns the entries from gitconfig. If `prefix` is
// provided, then only include entries in that section, which must
// match the at a component boundary (as defined by
// `configKeyMatchesPrefix()`), and strip off the prefix in the keys
// that are returned.
func (repo *Repository) GetConfig(prefix string) (*Config, error) {
cmd := repo.GitCommand("config", "--list", "-z")
out, err := cmd.Output()
if err != nil {
return nil, fmt.Errorf("reading git configuration: %w", err)
}
config := Config{
Prefix: prefix,
}
for len(out) > 0 {
keyEnd := bytes.IndexByte(out, '\n')
if keyEnd == -1 {
return nil, errors.New("invalid output from 'git config'")
}
key := string(out[:keyEnd])
out = out[keyEnd+1:]
valueEnd := bytes.IndexByte(out, 0)
if valueEnd == -1 {
return nil, errors.New("invalid output from 'git config'")
}
value := string(out[:valueEnd])
out = out[valueEnd+1:]
ok, rest := configKeyMatchesPrefix(key, prefix)
if !ok {
continue
}
entry := ConfigEntry{
Key: rest,
Value: value,
}
config.Entries = append(config.Entries, entry)
}
return &config, nil
}
// FullKey returns the full gitconfig key name for the relative key
// name `key`.
func (config *Config) FullKey(key string) string {
if config.Prefix == "" {
return key
}
return fmt.Sprintf("%s.%s", config.Prefix, key)
}
// configKeyMatchesPrefix checks whether `key` starts with `prefix` at
// a component boundary (i.e., at a '.'). If yes, it returns `true`
// and the part of the key after the prefix; e.g.:
//
// configKeyMatchesPrefix("foo.bar", "foo") → true, "bar"
// configKeyMatchesPrefix("foo.bar", "foo.") → true, "bar"
// configKeyMatchesPrefix("foo.bar", "foo.bar") → true, ""
// configKeyMatchesPrefix("foo.bar", "foo.bar.") → false, ""
func configKeyMatchesPrefix(key, prefix string) (bool, string) {
if prefix == "" {
return true, key
}
if !strings.HasPrefix(key, prefix) {
return false, ""
}
if prefix[len(prefix)-1] == '.' {
return true, key[len(prefix):]
}
if len(key) == len(prefix) {
return true, ""
}
if key[len(prefix)] == '.' {
return true, key[len(prefix)+1:]
}
return false, ""
}
func (repo *Repository) ConfigStringDefault(key string, defaultValue string) (string, error) {
cmd := repo.GitCommand(
"config",
"--default", defaultValue,
key,
)
out, err := cmd.Output()
if err != nil {
return defaultValue, fmt.Errorf("running 'git config': %w", err)
}
if len(out) > 0 && out[len(out)-1] == '\n' {
out = out[:len(out)-1]
}
return string(out), nil
}
func (repo *Repository) ConfigBoolDefault(key string, defaultValue bool) (bool, error) {
cmd := repo.GitCommand(
"config",
"--type", "bool",
"--default", strconv.FormatBool(defaultValue),
key,
)
out, err := cmd.Output()
if err != nil {
return defaultValue, fmt.Errorf("running 'git config': %w", err)
}
s := string(bytes.TrimSpace(out))
value, err := strconv.ParseBool(s)
if err != nil {
return defaultValue, fmt.Errorf("unexpected bool value from 'git config': %q", s)
}
return value, nil
}
func (repo *Repository) ConfigIntDefault(key string, defaultValue int) (int, error) {
cmd := repo.GitCommand(
"config",
"--type", "int",
"--default", strconv.Itoa(defaultValue),
key,
)
out, err := cmd.Output()
if err != nil {
return defaultValue, fmt.Errorf("running 'git config': %w", err)
}
s := string(bytes.TrimSpace(out))
value, err := strconv.Atoi(s)
if err != nil {
return defaultValue, fmt.Errorf("unexpected int value from 'git config': %q", s)
}
return value, nil
}
|
