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Add -config flag using cobra to specify config file path

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This commit is contained in:
Jeffrey Paul
2026-01-08 04:58:05 -08:00
parent 271527679e
commit 6a20406b0f
4 changed files with 82 additions and 23 deletions
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26
cmd/pixad/main.go
View File

@@ -2,6 +2,10 @@
package main
import (
"fmt"
"os"
"github.com/spf13/cobra"
"go.uber.org/fx"
"sneak.berlin/go/pixa/internal/config"
"sneak.berlin/go/pixa/internal/database"
@@ -19,11 +23,33 @@ var (
Buildarch string //nolint:gochecknoglobals // set by ldflags
)
var configPath string //nolint:gochecknoglobals // cobra flag
func main() {
rootCmd := &cobra.Command{
Use: "pixad",
Short: "Pixa image caching proxy server",
Run: run,
}
rootCmd.Flags().StringVarP(&configPath, "config", "c", "", "path to config file")
if err := rootCmd.Execute(); err != nil {
fmt.Fprintln(os.Stderr, err)
os.Exit(1)
}
}
func run(_ *cobra.Command, _ []string) {
globals.Appname = Appname
globals.Version = Version
globals.Buildarch = Buildarch
// Set config path in environment if specified via flag
if configPath != "" {
_ = os.Setenv("PIXA_CONFIG_PATH", configPath)
}
fx.New(
fx.Provide(
config.New,

2
go.mod
View File

@@ -11,6 +11,7 @@ require (
github.com/go-chi/cors v1.2.2
github.com/prometheus/client_golang v1.23.2
github.com/slok/go-http-metrics v0.13.0
github.com/spf13/cobra v1.10.2
go.uber.org/fx v1.24.0
golang.org/x/image v0.34.0
modernc.org/sqlite v1.42.2
@@ -85,6 +86,7 @@ require (
github.com/hashicorp/hcl v1.0.1-vault-7 // indirect
github.com/hashicorp/serf v0.10.1 // indirect
github.com/hashicorp/vault/api v1.20.0 // indirect
github.com/inconshreveable/mousetrap v1.1.0 // indirect
github.com/josharian/intern v1.0.0 // indirect
github.com/json-iterator/go v1.1.12 // indirect
github.com/kylelemons/godebug v1.1.0 // indirect

8
go.sum
View File

@@ -85,6 +85,7 @@ github.com/coreos/go-semver v0.3.1 h1:yi21YpKnrx1gt5R+la8n5WgS0kCrsPp33dmEyHReZr
github.com/coreos/go-semver v0.3.1/go.mod h1:irMmmIw/7yzSRPWryHsK7EYSg09caPQL03VsM8rvUec=
github.com/coreos/go-systemd/v22 v22.5.0 h1:RrqgGjYQKalulkV8NGVIfkXQf6YYmOyiJKk8iXXhfZs=
github.com/coreos/go-systemd/v22 v22.5.0/go.mod h1:Y58oyj3AT4RCenI/lSvhwexgC+NSVTIJ3seZv2GcEnc=
github.com/cpuguy83/go-md2man/v2 v2.0.6/go.mod h1:oOW0eioCTA6cOiMLiUPZOpcVxMig6NIQQ7OS05n1F4g=
github.com/creack/pty v1.1.9/go.mod h1:oKZEueFk5CKHvIhNR5MUki03XCEU+Q6VDXinZuGJ33E=
github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
@@ -228,6 +229,8 @@ github.com/hashicorp/serf v0.10.1 h1:Z1H2J60yRKvfDYAOZLd2MU0ND4AH/WDz7xYHDWQsIPY
github.com/hashicorp/serf v0.10.1/go.mod h1:yL2t6BqATOLGc5HF7qbFkTfXoPIY0WZdWHfEvMqbG+4=
github.com/hashicorp/vault/api v1.20.0 h1:KQMHElgudOsr+IbJgmbjHnCTxEpKs9LnozA1D3nozU4=
github.com/hashicorp/vault/api v1.20.0/go.mod h1:GZ4pcjfzoOWpkJ3ijHNpEoAxKEsBJnVljyTe3jM2Sms=
github.com/inconshreveable/mousetrap v1.1.0 h1:wN+x4NVGpMsO7ErUn/mUI3vEoE6Jt13X2s0bqwp9tc8=
github.com/inconshreveable/mousetrap v1.1.0/go.mod h1:vpF70FUmC8bwa3OWnCshd2FqLfsEA9PFc4w1p2J65bw=
github.com/josharian/intern v1.0.0 h1:vlS4z54oSdjm0bgjRigI+G1HpF+tI+9rE5LLzOg8HmY=
github.com/josharian/intern v1.0.0/go.mod h1:5DoeVV0s6jJacbCEi61lwdGj/aVlrQvzHFFd8Hwg//Y=
github.com/json-iterator/go v1.1.6/go.mod h1:+SdeFBvtyEkXs7REEP0seUULqWtbJapLOCVDaaPEHmU=
@@ -340,6 +343,7 @@ github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec h1:W09IVJc94
github.com/remyoudompheng/bigfft v0.0.0-20230129092748-24d4a6f8daec/go.mod h1:qqbHyh8v60DhA7CoWK5oRCqLrMHRGoxYCSS9EjAz6Eo=
github.com/rogpeppe/go-internal v1.13.1 h1:KvO1DLK/DRN07sQ1LQKScxyZJuNnedQ5/wKSR38lUII=
github.com/rogpeppe/go-internal v1.13.1/go.mod h1:uMEvuHeurkdAXX61udpOXGD/AzZDWNMNyH2VO9fmH0o=
github.com/russross/blackfriday/v2 v2.1.0/go.mod h1:+Rmxgy9KzJVeS9/2gXHxylqXiyQDYRxCVz55jmeOWTM=
github.com/ryanuber/columnize v0.0.0-20160712163229-9b3edd62028f/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
github.com/ryanuber/columnize v2.1.0+incompatible/go.mod h1:sm1tb6uqfes/u+d4ooFouqFdy9/2g9QGwK3SQygK0Ts=
github.com/ryanuber/go-glob v1.0.0 h1:iQh3xXAumdQ+4Ufa5b25cRpC5TYKlno6hsv6Cb3pkBk=
@@ -350,6 +354,9 @@ github.com/sirupsen/logrus v1.2.0/go.mod h1:LxeOpSwHxABJmUn/MG1IvRgCAasNZTLOkJPx
github.com/sirupsen/logrus v1.4.2/go.mod h1:tLMulIdttU9McNUspp0xgXVQah82FyeX6MwdIuYE2rE=
github.com/slok/go-http-metrics v0.13.0 h1:lQDyJJx9wKhmbliyUsZ2l6peGnXRHjsjoqPt5VYzcP8=
github.com/slok/go-http-metrics v0.13.0/go.mod h1:HIr7t/HbN2sJaunvnt9wKP9xoBBVZFo1/KiHU3b0w+4=
github.com/spf13/cobra v1.10.2 h1:DMTTonx5m65Ic0GOoRY2c16WCbHxOOw6xxezuLaBpcU=
github.com/spf13/cobra v1.10.2/go.mod h1:7C1pvHqHw5A4vrJfjNwvOdzYu0Gml16OCs2GRiTUUS4=
github.com/spf13/pflag v1.0.9/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
github.com/spf13/pflag v1.0.10 h1:4EBh2KAYBwaONj6b2Ye1GiHfwjqyROoF4RwYO+vPwFk=
github.com/spf13/pflag v1.0.10/go.mod h1:McXfInJRrz4CZXVZOBLb0bTZqETkiAhM9Iw0y3An2Bg=
github.com/stretchr/objx v0.1.0/go.mod h1:HFkY916IF+rwdDfMAkV7OtwuqBVzrE8GR6GFx+wExME=
@@ -413,6 +420,7 @@ go.uber.org/zap v1.27.0 h1:aJMhYGrd5QSmlpLMr2MftRKl7t8J8PTZPA732ud/XR8=
go.uber.org/zap v1.27.0/go.mod h1:GB2qFLM7cTU87MWRP2mPIjqfIDnGu+VIO4V/SdhGo2E=
go.yaml.in/yaml/v2 v2.4.2 h1:DzmwEr2rDGHl7lsFgAHxmNz/1NlQ7xLIrlN2h5d1eGI=
go.yaml.in/yaml/v2 v2.4.2/go.mod h1:081UH+NErpNdqlCXm3TtEran0rJZGxAYx9hb/ELlsPU=
go.yaml.in/yaml/v3 v3.0.4/go.mod h1:DhzuOOF2ATzADvBadXxruRBLzYTpT36CKvDb3+aBEFg=
golang.org/x/crypto v0.0.0-20180904163835-0709b304e793/go.mod h1:6SG95UA2DQfeDnfUPMdvaQW0Q7yPrPDi9nlGo2tz2b4=
golang.org/x/crypto v0.0.0-20190308221718-c2843e01d9a2/go.mod h1:djNgcEr1/C05ACkg1iLfiJU5Ep61QUkGW8qpdssI0+w=
golang.org/x/crypto v0.0.0-20190923035154-9ee001bba392/go.mod h1:/lpIB1dKB+9EgE3H3cr1v9wB50oz8l4C4h62xy7jSTY=

69
internal/config/config.go
View File

@@ -3,6 +3,7 @@ package config
import (
"fmt"
"log/slog"
"os"
"path/filepath"
"strings"
@@ -48,29 +49,9 @@ func New(_ fx.Lifecycle, params Params) (*Config, error) {
log := params.Logger.Get()
name := params.Globals.Appname
var sc *smartconfig.Config
var err error
// Try loading config from standard locations
configPaths := []string{
fmt.Sprintf("/etc/%s/config.yml", name),
fmt.Sprintf("/etc/%s/config.yaml", name),
filepath.Join(os.Getenv("HOME"), ".config", name, "config.yml"),
filepath.Join(os.Getenv("HOME"), ".config", name, "config.yaml"),
"config.yml",
"config.yaml",
}
for _, path := range configPaths {
if _, statErr := os.Stat(path); statErr == nil {
sc, err = smartconfig.NewFromConfigPath(path)
if err == nil {
log.Info("loaded config file", "path", path)
break
}
log.Warn("failed to parse config file", "path", path, "error", err)
}
sc, err := loadConfigFile(log, name)
if err != nil {
return nil, err
}
if sc == nil {
@@ -103,6 +84,48 @@ func New(_ fx.Lifecycle, params Params) (*Config, error) {
return c, nil
}
// loadConfigFile loads configuration from PIXA_CONFIG_PATH env var or standard locations.
func loadConfigFile(log *slog.Logger, appName string) (*smartconfig.Config, error) {
// Check for explicit config path from environment
if envPath := os.Getenv("PIXA_CONFIG_PATH"); envPath != "" {
sc, err := smartconfig.NewFromConfigPath(envPath)
if err != nil {
return nil, fmt.Errorf("failed to load config from %s: %w", envPath, err)
}
log.Info("loaded config file", "path", envPath)
return sc, nil
}
// Try loading config from standard locations
configPaths := []string{
fmt.Sprintf("/etc/%s/config.yml", appName),
fmt.Sprintf("/etc/%s/config.yaml", appName),
filepath.Join(os.Getenv("HOME"), ".config", appName, "config.yml"),
filepath.Join(os.Getenv("HOME"), ".config", appName, "config.yaml"),
"config.yml",
"config.yaml",
}
for _, path := range configPaths {
if _, statErr := os.Stat(path); statErr == nil {
sc, err := smartconfig.NewFromConfigPath(path)
if err != nil {
log.Warn("failed to parse config file", "path", path, "error", err)
continue
}
log.Info("loaded config file", "path", path)
return sc, nil
}
}
return nil, nil //nolint:nilnil // nil config is valid (use defaults)
}
func getString(sc *smartconfig.Config, key, defaultVal string) string {
if sc == nil {
return defaultVal