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f903db492c
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.
74 lines
1.8 KiB
Go
74 lines
1.8 KiB
Go
package azure
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import (
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"os"
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"path"
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"strings"
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"github.com/restic/restic/internal/errors"
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"github.com/restic/restic/internal/options"
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)
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// Config contains all configuration necessary to connect to an azure compatible
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// server.
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type Config struct {
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AccountName string
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AccountSAS options.SecretString
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AccountKey options.SecretString
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Container string
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Prefix string
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Connections uint `option:"connections" help:"set a limit for the number of concurrent connections (default: 5)"`
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}
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// NewConfig returns a new Config with the default values filled in.
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func NewConfig() Config {
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return Config{
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Connections: 5,
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}
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}
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func init() {
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options.Register("azure", Config{})
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}
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// ParseConfig parses the string s and extracts the azure config. The
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// configuration format is azure:containerName:/[prefix].
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func ParseConfig(s string) (*Config, error) {
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if !strings.HasPrefix(s, "azure:") {
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return nil, errors.New("azure: invalid format")
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}
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// strip prefix "azure:"
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s = s[6:]
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// use the first entry of the path as the bucket name and the
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// remainder as prefix
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container, prefix, colon := strings.Cut(s, ":")
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if !colon {
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return nil, errors.New("azure: invalid format: bucket name or path not found")
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}
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prefix = strings.TrimPrefix(path.Clean(prefix), "/")
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cfg := NewConfig()
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cfg.Container = container
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cfg.Prefix = prefix
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return &cfg, nil
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}
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// ApplyEnvironment saves values from the environment to the config.
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func ApplyEnvironment(cfgRaw interface{}) error {
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cfg := cfgRaw.(*Config)
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if cfg.AccountName == "" {
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cfg.AccountName = os.Getenv("AZURE_ACCOUNT_NAME")
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}
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if cfg.AccountKey.String() == "" {
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cfg.AccountKey = options.NewSecretString(os.Getenv("AZURE_ACCOUNT_KEY"))
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}
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if cfg.AccountSAS.String() == "" {
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cfg.AccountSAS = options.NewSecretString(os.Getenv("AZURE_ACCOUNT_SAS"))
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}
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return nil
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}
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