podman-pod{rm,start,stop}: support --pod-id-file

Support the `--pod-id-file` flag in the rm, start and stop pod commands.
This completes the already support flag in pod-create and is another
prerequisite for generating generic systemd unit files for pods.

Also add completions, docs and tests.

Signed-off-by: Valentin Rothberg <rothberg@redhat.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/cmd/podman/pods/common.go b/cmd/podman/pods/common.go
new file mode 100644
index 000000000..1c4195095
--- /dev/null
+++ b/cmd/podman/pods/common.go
@@ -0,0 +1,23 @@
+package pods
+
+import (
+	"io/ioutil"
+	"strings"
+
+	"github.com/pkg/errors"
+)
+
+// readPodIDFiles reads the specified files and returns their content (i.e.,
+// first line).
+func readPodIDFiles(files []string) ([]string, error) {
+	ids := []string{}
+	for _, podFile := range files {
+		content, err := ioutil.ReadFile(podFile)
+		if err != nil {
+			return nil, errors.Wrap(err, "error reading pod ID file")
+		}
+		id := strings.Split(string(content), "\n")[0]
+		ids = append(ids, id)
+	}
+	return ids, nil
+}