sneak
332bc909ce
check / check (push) Successful in 39s
Main ran the command tree on a background context, so SIGINT, SIGTERM or SIGHUP killed the process before the deferred cleanup ran: the agent's temporary directory and socket, and the install working directory, were left behind. Main now runs the tree on a signal.NotifyContext for those three signals. A signal cancels the context, which ends the child ssh or sftp started with exec.CommandContext, and the deferred cleanup then runs. The exit status after a signal stays 1 unless ssh reported one of its own. For "ssh to" the child is cancelled with SIGTERM rather than the default kill, so ssh restores the terminal before it goes. Model: opus-4-8
98 lines
2.6 KiB
Go
98 lines
2.6 KiB
Go
// Package cli builds the command tree and runs it.
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package cli
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import (
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"context"
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"errors"
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"fmt"
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"os"
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"os/signal"
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"runtime/debug"
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"syscall"
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"git.eeqj.de/sneak/keyfunc/internal/cli/age"
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"git.eeqj.de/sneak/keyfunc/internal/cli/mnemonic"
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"git.eeqj.de/sneak/keyfunc/internal/cli/options"
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"git.eeqj.de/sneak/keyfunc/internal/cli/ssh"
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"github.com/spf13/cobra"
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)
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// devVersion is what Version holds until a build stamps a real one.
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const devVersion = "dev"
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// Version is what --version prints. make build stamps it with -ldflags.
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//
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//nolint:gochecknoglobals // set at build time with -ldflags
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var Version = devVersion
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// resolveVersion chooses what --version reports. A value stamped at
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// build time wins. Otherwise, for a binary from go install, the module
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// version recorded in the build info is used, unless that is empty or
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// the "(devel)" of a local build. When neither names a version, the
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// "dev" fallback stays.
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func resolveVersion(stamped string, info *debug.BuildInfo) string {
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if stamped != devVersion {
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return stamped
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}
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if info != nil && info.Main.Version != "" &&
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info.Main.Version != "(devel)" {
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return info.Main.Version
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}
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return devVersion
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}
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// Root returns the whole command tree.
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func Root() *cobra.Command {
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info, _ := debug.ReadBuildInfo()
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root := &cobra.Command{
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Use: "keyfunc",
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Short: "derive key pairs from a BIP-39 mnemonic",
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Long: "keyfunc turns a BIP-39 mnemonic into key pairs that can " +
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"be recreated from that mnemonic at any time. The same " +
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"mnemonic, key type and index always give the same key.",
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Version: resolveVersion(Version, info),
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SilenceUsage: true,
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SilenceErrors: true,
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}
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options.Add(root)
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root.AddCommand(ssh.Command(), age.Command(), mnemonic.Command())
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return root
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}
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// Main runs the tool and returns the status the process should exit
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// with. An error ends the tool with status 1, except when it carries a
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// status of its own, which "ssh to" uses to hand on the status ssh
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// ended with. ssh has already said whatever it had to say in that
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// case, so nothing more is printed.
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//
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// SIGINT, SIGTERM and SIGHUP cancel the command's context instead of
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// killing the process outright, so the child ssh or sftp ends and the
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// deferred cleanup that removes the agent socket and the install
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// working directory still runs.
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func Main() int {
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ctx, stop := signal.NotifyContext(
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context.Background(),
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syscall.SIGINT, syscall.SIGTERM, syscall.SIGHUP,
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)
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defer stop()
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err := Root().ExecuteContext(ctx)
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if err == nil {
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return 0
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}
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var passed ssh.StatusError
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if errors.As(err, &passed) {
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return passed.Status
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}
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fmt.Fprintln(os.Stderr, "keyfunc: "+err.Error())
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return 1
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}
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