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Add 'environment' package

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This commit adds a new environment package that manages all calls to the
underlying operating system.
This commit is contained in:
Tom Wiesing 2022-09-18 14:24:22 +02:00
parent 822c70cd69
commit f19619ef9f
No known key found for this signature in database
60 changed files with 539 additions and 308 deletions
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19
internal/config/read.go
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@ -4,6 +4,7 @@ import (
"io"
"reflect"
"github.com/FAU-CDI/wisski-distillery/pkg/environment"
"github.com/FAU-CDI/wisski-distillery/pkg/envreader"
"github.com/FAU-CDI/wisski-distillery/pkg/stringparser"
)
@ -16,7 +17,7 @@ import (
// When a key is missing, it is set to the default value.
//
// See also [stringparser.Parse].
func (config *Config) Unmarshal(src io.Reader) error {
func (config *Config) Unmarshal(env environment.Environment, src io.Reader) error {
// read all the values!
values, err := envreader.ReadAll(src)
if err != nil {
@ -32,26 +33,26 @@ func (config *Config) Unmarshal(src io.Reader) error {
tField := tConfig.Field(i)
vField := vConfig.FieldByName(tField.Name)
env := tField.Tag.Get("env")
dflt := tField.Tag.Get("default")
parser := tField.Tag.Get("parser")
tEnv := tField.Tag.Get("env")
tDefault := tField.Tag.Get("default")
tParser := tField.Tag.Get("parser")
// skip it if it isn't loaded!
if env == "" {
if tEnv == "" {
continue
}
// read the value with a default
value, ok := values[env]
value, ok := values[tEnv]
if !ok || value == "" {
if dflt == "" {
if tDefault == "" {
continue
}
value = dflt
value = tDefault
}
// parse the value!
if err := stringparser.Parse(parser, value, vField); err != nil {
if err := stringparser.Parse(env, tParser, value, vField); err != nil {
return err
}
}