Issue reading in .env file

[dtrinh100]

Expected behavior (what you expected to happen):

For it to read in the config from the .env file and map it to the struct.

Actual behavior (what actually happened):

I get the following error: While parsing config: lineapp:doesn't match format

Repl.it link:

Code reproducing the issue:

.env:

APP_ENVIRONMENT=development

config.go:

type Configs struct {
    AppEnvironment           string `mapstructure:"APP_ENVIRONMENT"`
}

main.go

var configs config.Configs
viper.SetConfigType("env") // REQUIRED if the config file does not have the extension in the name
viper.AddConfigPath(".")               // optionally look for config in the working directory
err := viper.ReadInConfig() // Find and read the config file
if err != nil { // Handle errors reading the config file
    panic(fmt.Errorf("Fatal error config file: %s \n", err))
}
err := viper.Unmarshal(&configs)
if err != nil {
    panic(err)
}

Environment:

• Viper version: 1.6.3
• Config source: file
• File format: .env

Anything else we should know?:

[github-actions[bot]]

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[xwjdsh]

I tried your example, just add one line and everything will be fine.

viper.SetConfigType("env")
viper.AddConfigPath(".")
+ viper.SetConfigFile(".env")

[kchugalinskiy]

func New() *Viper {
...
    v.configName = "config"

this is the root cause of your issue. by specifying extension only viper assumes you're searching for config.env file. so use SetConfigFile as specified above please