Files
podman/cmd/podman/main.go
Paul Holzinger b5d1d89a37 Add shell completion with cobra
Allow automatic generation for shell completion scripts
with the internal cobra functions (requires v1.0.0+).

This should replace the handwritten completion scripts
and even adds support for fish. With this approach it is
less likley that completions and code are out of sync.

We can now create the scripts with
- podman completion bash
- podman completion zsh
- podman completion fish

To test the completion run:
source <(podman completion bash)

The same works for podman-remote and podman --remote and
it will complete your remote containers/images with
the correct endpoints values from --url/--connection.

The completion logic is written in go and provided by the
cobra library. The completion functions lives in
`cmd/podman/completion/completion.go`.

The unit test at cmd/podman/shell_completion_test.go checks
if each command and flag has an autocompletion function set.
This prevents that commands and flags have no shell completion set.

This commit does not replace the current autocompletion scripts.

Closes #6440

Signed-off-by: Paul Holzinger <paul.holzinger@web.de>
2020-11-12 11:38:31 +01:00

88 lines
2.7 KiB
Go

package main
import (
"fmt"
"os"
_ "github.com/containers/podman/v2/cmd/podman/completion"
_ "github.com/containers/podman/v2/cmd/podman/containers"
_ "github.com/containers/podman/v2/cmd/podman/generate"
_ "github.com/containers/podman/v2/cmd/podman/healthcheck"
_ "github.com/containers/podman/v2/cmd/podman/images"
_ "github.com/containers/podman/v2/cmd/podman/manifest"
_ "github.com/containers/podman/v2/cmd/podman/networks"
_ "github.com/containers/podman/v2/cmd/podman/play"
_ "github.com/containers/podman/v2/cmd/podman/pods"
"github.com/containers/podman/v2/cmd/podman/registry"
_ "github.com/containers/podman/v2/cmd/podman/system"
_ "github.com/containers/podman/v2/cmd/podman/system/connection"
_ "github.com/containers/podman/v2/cmd/podman/volumes"
"github.com/containers/podman/v2/pkg/rootless"
"github.com/containers/podman/v2/pkg/terminal"
"github.com/containers/storage/pkg/reexec"
"github.com/sirupsen/logrus"
"github.com/spf13/cobra"
)
func main() {
if reexec.Init() {
// We were invoked with a different argv[0] indicating that we
// had a specific job to do as a subprocess, and it's done.
return
}
// Hard code TMPDIR functions to use /var/tmp, if user did not override
if _, ok := os.LookupEnv("TMPDIR"); !ok {
os.Setenv("TMPDIR", "/var/tmp")
}
rootCmd = parseCommands()
Execute()
os.Exit(0)
}
func parseCommands() *cobra.Command {
cfg := registry.PodmanConfig()
for _, c := range registry.Commands {
for _, m := range c.Mode {
if cfg.EngineMode == m {
// Command cannot be run rootless
_, found := c.Command.Annotations[registry.UnshareNSRequired]
if found {
if rootless.IsRootless() && found && os.Getuid() != 0 {
c.Command.RunE = func(cmd *cobra.Command, args []string) error {
return fmt.Errorf("cannot run command %q in rootless mode, must execute `podman unshare` first", cmd.CommandPath())
}
}
} else {
_, found = c.Command.Annotations[registry.ParentNSRequired]
if rootless.IsRootless() && found {
c.Command.RunE = func(cmd *cobra.Command, args []string) error {
return fmt.Errorf("cannot run command %q in rootless mode", cmd.CommandPath())
}
}
}
parent := rootCmd
if c.Parent != nil {
parent = c.Parent
}
parent.AddCommand(c.Command)
// - templates need to be set here, as PersistentPreRunE() is
// not called when --help is used.
// - rootCmd uses cobra default template not ours
c.Command.SetHelpTemplate(helpTemplate)
c.Command.SetUsageTemplate(usageTemplate)
c.Command.DisableFlagsInUseLine = true
}
}
}
if err := terminal.SetConsole(); err != nil {
logrus.Error(err)
os.Exit(1)
}
return rootCmd
}