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Support config overrides using env variables

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Override configuration values by setting PAT_* environment variables.
This is handy when deploying a containerized/scripted setup.

Syntax examples:
* PAT_MYCALL=LA5NTA
* PAT_ARDOP_ADDR="host:port"
This commit is contained in:
Martin Hebnes Pedersen 2023-11-04 13:39:39 +01:00
parent 230e2cfc7f
commit 77cc83bdc1
3 changed files with 17 additions and 3 deletions
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17
config.go
View file

@ -11,15 +11,26 @@ import (
"path"
"strings"
"github.com/kelseyhightower/envconfig"
"github.com/la5nta/pat/cfg"
"github.com/la5nta/pat/internal/buildinfo"
"github.com/la5nta/pat/internal/debug"
)
func LoadConfig(cfgPath string, fallback cfg.Config) (config cfg.Config, err error) {
config, err = ReadConfig(cfgPath)
if os.IsNotExist(err) {
return fallback, WriteConfig(fallback, cfgPath)
} else if err != nil {
switch {
case os.IsNotExist(err):
config = fallback
if err := WriteConfig(config, cfgPath); err != nil {
return config, err
}
case err != nil:
return config, err
}
// Environment variables overrides values from the config file
if err := envconfig.Process(buildinfo.AppName, &config); err != nil {
return config, err
}

1
go.mod
View file

@ -12,6 +12,7 @@ require (
github.com/gorilla/websocket v1.4.2
github.com/harenber/ptc-go/v2 v2.2.3
github.com/howeyc/gopass v0.0.0-20190910152052-7cb4b85ec19c
github.com/kelseyhightower/envconfig v1.4.0
github.com/la5nta/wl2k-go v0.11.8
github.com/microcosm-cc/bluemonday v1.0.16
github.com/n8jja/Pat-Vara v1.1.4

2
go.sum
View file

@ -34,6 +34,8 @@ github.com/howeyc/crc16 v0.0.0-20171223171357-2b2a61e366a6 h1:IIVxLyDUYErC950b8k
github.com/howeyc/crc16 v0.0.0-20171223171357-2b2a61e366a6/go.mod h1:JslaLRrzGsOKJgFEPBP65Whn+rdwDQSk0I0MCRFe2Zw=
github.com/howeyc/gopass v0.0.0-20190910152052-7cb4b85ec19c h1:aY2hhxLhjEAbfXOx2nRJxCXezC6CO2V/yN+OCr1srtk=
github.com/howeyc/gopass v0.0.0-20190910152052-7cb4b85ec19c/go.mod h1:lADxMC39cJJqL93Duh1xhAs4I2Zs8mKS89XWXFGp9cs=
github.com/kelseyhightower/envconfig v1.4.0 h1:Im6hONhd3pLkfDFsbRgu68RDNkGF1r3dvMUtDTo2cv8=
github.com/kelseyhightower/envconfig v1.4.0/go.mod h1:cccZRl6mQpaq41TPp5QxidR+Sa3axMbJDNb//FQX6Gg=
github.com/kr/pretty v0.2.1/go.mod h1:ipq/a2n7PKx3OHsz4KJII5eveXtPO4qwEXGdVfWzfnI=
github.com/kr/pty v1.1.1/go.mod h1:pFQYn66WHrOpPYNljwOMqo10TkYh1fy3cYio2l3bCsQ=
github.com/kr/text v0.1.0/go.mod h1:4Jbv+DJW3UT/LiOwJeYQe1efqtUx/iVham/4vfdArNI=