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flagcfg

Go Reference

The flagcfg package populates flags from a TOML config file. Each flag is assumed to have an optional top-level value in the config file, having the same name. However, if a flag contains a dash or a period, those are converted to underscores.

Flags that have aready been assigned are not overwritten.

This package can be used together with github.com/facebookgo/flagenv to load flags from a config file, environment variable, or command-line.

Example:

// Parse flags from command-line
flag.Parse()

// Parser flags from config
flagcfg.AddDefaults()
// or use flagcfg.AddDefaultFiles("MYAPP_CONFIG", "myapp.config")
flagcfg.Parse()

// Parse flags from environment (using github.com/facebookgo/flagenv)
flagenv.Prefix = "MYPREFIX_"
flagenv.Parse()