57 lines
2.0 KiB
Go
57 lines
2.0 KiB
Go
// Copyright © 2022 Roberto Hidalgo <chinampa@un.rob.mx>
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// SPDX-License-Identifier: Apache-2.0
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package exec
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import (
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"bytes"
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"context"
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"fmt"
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os_exec "os/exec"
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"strings"
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"time"
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"git.rob.mx/nidito/chinampa/pkg/errors"
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"github.com/sirupsen/logrus"
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"github.com/spf13/cobra"
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)
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// ExecFunc is replaced in tests.
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var ExecFunc = WithSubshell
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// WithSubshell is the default runner of subprocesses.
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func WithSubshell(ctx context.Context, env []string, executable string, args ...string) (bytes.Buffer, bytes.Buffer, error) {
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cmd := os_exec.CommandContext(ctx, executable, args...) // #nosec G204
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var stdout bytes.Buffer
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cmd.Stdout = &stdout
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var stderr bytes.Buffer
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cmd.Stderr = &stderr
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cmd.Env = env
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return stdout, stderr, cmd.Run()
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}
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// Exec runs a subprocess and returns a list of lines from stdout.
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func Exec(name string, args []string, env []string, timeout time.Duration, log *logrus.Entry) ([]string, cobra.ShellCompDirective, error) {
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ctx, cancel := context.WithTimeout(context.Background(), timeout)
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defer cancel() // The cancel should be deferred so resources are cleaned up
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log.Tracef("executing a subshell for %s", args)
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executable := args[0]
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args = args[1:]
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stdout, _, err := ExecFunc(ctx, env, executable, args...)
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if ctx.Err() == context.DeadlineExceeded {
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log.Warn("Sub-command timed out")
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log.Debugf("timeout running %s %s: %s", executable, args, stdout.String())
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return []string{}, cobra.ShellCompDirectiveError, fmt.Errorf("timed out resolving %s %s", executable, args)
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}
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if err != nil {
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log.Debugf("error running %s %s: %s", executable, args, err)
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return []string{}, cobra.ShellCompDirectiveError, errors.BadArguments{Msg: fmt.Sprintf("could not validate argument for command %s, ran <%s %s> failed: %s", name, executable, strings.Join(args, " "), err)}
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}
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log.Tracef("finished running %s %s: %s", executable, args, stdout.String())
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return strings.Split(strings.TrimSuffix(stdout.String(), "\n"), "\n"), cobra.ShellCompDirectiveDefault, nil
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}
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