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e8c1cfe142
When enabled, metrics are pushed to the provided Prometheus Push Gateway at the start and end of each command and periodically every few seconds. ``` --metrics-push-addr=http://address:port --metrics-push-interval=5s --metrics-push-job=kopia --metrics-push-grouping=a:b --metrics-push-grouping=c:d --metrics-push-username=user --metrics-push-password=pass ```
54 lines
1.2 KiB
Go
54 lines
1.2 KiB
Go
package cli
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import (
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"context"
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"io"
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"github.com/alecthomas/kingpin"
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"github.com/pkg/errors"
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"github.com/kopia/kopia/repo/logging"
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)
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// RunSubcommand executes the subcommand asynchronously in current process
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// with flags in an isolated CLI environment and returns standard output and standard error.
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func (c *App) RunSubcommand(ctx context.Context, kpapp *kingpin.Application, argsAndFlags []string) (stdout, stderr io.Reader, wait func() error, kill func()) {
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stdoutReader, stdoutWriter := io.Pipe()
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stderrReader, stderrWriter := io.Pipe()
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c.stdoutWriter = stdoutWriter
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c.stderrWriter = stderrWriter
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c.rootctx = logging.WithLogger(ctx, logging.Writer(stderrWriter))
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c.Attach(kpapp)
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var exitCode int
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resultErr := make(chan error, 1)
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c.osExit = func(ec int) {
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exitCode = ec
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}
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go func() {
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defer close(resultErr)
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defer stderrWriter.Close() //nolint:errcheck
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defer stdoutWriter.Close() //nolint:errcheck
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_, err := kpapp.Parse(argsAndFlags)
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if err != nil {
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resultErr <- err
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return
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}
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if exitCode != 0 {
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resultErr <- errors.Errorf("exit code %v", exitCode)
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return
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}
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}()
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return stdoutReader, stderrReader, func() error {
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return <-resultErr
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}, func() {}
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}
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