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backend: let ParseConfig return a Config pointer

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In order to change the backend initialization in `global.go` to be able
to generically call cfg.ApplyEnvironment() for supported backends, the
`interface{}` returned by `ParseConfig` must contain a pointer to the
configuration.

An alternative would be to use reflection to convert the type from
`interface{}(Config)` to `interface{}(*Config)` (from value to pointer
type). However, this would just complicate the type mess further.
This commit is contained in:
Michael Eischer
2023-04-21 21:35:34 +02:00
parent 25a0be7f26
commit f903db492c
26 changed files with 165 additions and 146 deletions
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8
internal/backend/gs/config.go
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@@ -35,9 +35,9 @@ func init() {
// ParseConfig parses the string s and extracts the gcs config. The
// supported configuration format is gs:bucketName:/[prefix].
func ParseConfig(s string) (Config, error) {
func ParseConfig(s string) (*Config, error) {
if !strings.HasPrefix(s, "gs:") {
return Config{}, errors.New("gs: invalid format")
return nil, errors.New("gs: invalid format")
}
// strip prefix "gs:"
@@ -47,7 +47,7 @@ func ParseConfig(s string) (Config, error) {
// remainder as prefix
bucket, prefix, colon := strings.Cut(s, ":")
if !colon {
return Config{}, errors.New("gs: invalid format: bucket name or path not found")
return nil, errors.New("gs: invalid format: bucket name or path not found")
}
prefix = strings.TrimPrefix(path.Clean(prefix), "/")
@@ -55,7 +55,7 @@ func ParseConfig(s string) (Config, error) {
cfg := NewConfig()
cfg.Bucket = bucket
cfg.Prefix = prefix
return cfg, nil
return &cfg, nil
}
// ApplyEnvironment saves values from the environment to the config.