93 lines
2.4 KiB
Go
93 lines
2.4 KiB
Go
package run
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import (
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"flag"
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"fmt"
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"io"
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"os"
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"github.com/BurntSushi/toml"
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)
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// PrintConfigCommand represents the command executed by "influxd config".
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type PrintConfigCommand struct {
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Stdin io.Reader
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Stdout io.Writer
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Stderr io.Writer
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}
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// NewPrintConfigCommand return a new instance of PrintConfigCommand.
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func NewPrintConfigCommand() *PrintConfigCommand {
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return &PrintConfigCommand{
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Stdin: os.Stdin,
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Stdout: os.Stdout,
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Stderr: os.Stderr,
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}
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}
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// Run parses and prints the current config loaded.
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func (cmd *PrintConfigCommand) Run(args ...string) error {
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// Parse command flags.
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fs := flag.NewFlagSet("", flag.ContinueOnError)
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configPath := fs.String("config", "", "")
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fs.Usage = func() { fmt.Fprintln(cmd.Stderr, printConfigUsage) }
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if err := fs.Parse(args); err != nil {
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return err
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}
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// Parse config from path.
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opt := Options{ConfigPath: *configPath}
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config, err := cmd.parseConfig(opt.GetConfigPath())
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if err != nil {
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return fmt.Errorf("parse config: %s", err)
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}
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// Apply any environment variables on top of the parsed config
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if err := config.ApplyEnvOverrides(); err != nil {
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return fmt.Errorf("apply env config: %v", err)
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}
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// Validate the configuration.
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if err := config.Validate(); err != nil {
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return fmt.Errorf("%s. To generate a valid configuration file run `influxd config > influxdb.generated.conf`", err)
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}
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toml.NewEncoder(cmd.Stdout).Encode(config)
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fmt.Fprint(cmd.Stdout, "\n")
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return nil
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}
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// ParseConfig parses the config at path.
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// Returns a demo configuration if path is blank.
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func (cmd *PrintConfigCommand) parseConfig(path string) (*Config, error) {
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config, err := NewDemoConfig()
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if err != nil {
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config = NewConfig()
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}
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if path == "" {
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return config, nil
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}
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fmt.Fprintf(os.Stderr, "Merging with configuration at: %s\n", path)
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if err := config.FromTomlFile(path); err != nil {
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return nil, err
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}
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return config, nil
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}
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var printConfigUsage = `Displays the default configuration.
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Usage: influxd config [flags]
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-config <path>
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Set the path to the initial configuration file.
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This defaults to the environment variable INFLUXDB_CONFIG_PATH,
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~/.influxdb/influxdb.conf, or /etc/influxdb/influxdb.conf if a file
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is present at any of these locations.
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Disable the automatic loading of a configuration file using
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the null device (such as /dev/null).
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`
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