container/ps: add HealthCheck formatter field

Signed-off-by: Mohammed Thaha <mohammedthahacse@gmail.com>

Author: Mohammed-Thaha

cli/command/formatter/container.go

@@ -28,6 +28,7 @@ const (
 	localVolumes     = "LOCAL VOLUMES"
 	networksHeader   = "NETWORKS"
 	platformHeader   = "PLATFORM"
+	healthCheckHeader = "HEALTHCHECK"
 )
 
 // Platform wraps a [ocispec.Platform] to implement the stringer interface.
@@ -121,6 +122,7 @@ func NewContainerContext() *ContainerContext {
 		"LocalVolumes": localVolumes,
 		"Networks":     networksHeader,
 		"Platform":     platformHeader,
+		"HealthCheck": healthCheckHeader,
 	}
 	return &containerCtx
 }
@@ -352,6 +354,27 @@ func (c *ContainerContext) Networks() string {
 	return strings.Join(networks, ",")
 }
 
+// HealthCheck returns the container's health status (for example, "healthy","unhealthy", or "starting").
+// If no healthcheck is configured, an empty
+// string is returned.
+func (c *ContainerContext) HealthCheck() string {
+	if c.c.Health != nil && c.c.Health.Status != "" {
+		return string(c.c.Health.Status)
+	}
+
+	// Fallback for daemons/API versions that include health only in Status text.
+	switch {
+	case strings.HasSuffix(c.c.Status, "(healthy)"):
+		return string(container.Healthy)
+	case strings.HasSuffix(c.c.Status, "(unhealthy)"):
+		return string(container.Unhealthy)
+	case strings.HasSuffix(c.c.Status, "(health: starting)"):
+		return string(container.Starting)
+	}
+
+	return ""
+}
+
 // DisplayablePorts returns formatted string representing open ports of container
 // e.g. "0.0.0.0:80->9090/tcp, 9988/tcp"
 // it's used by command 'docker ps'

cli/command/formatter/container_test.go

@@ -494,6 +494,7 @@ func TestContainerContextWriteJSON(t *testing.T) {
 		{
 			"Command":      `""`,
 			"CreatedAt":    expectedCreated,
+			"HealthCheck":  "",
 			"ID":           "containerID1",
 			"Image":        "ubuntu",
 			"Labels":       "",
@@ -511,6 +512,7 @@ func TestContainerContextWriteJSON(t *testing.T) {
 		{
 			"Command":      `""`,
 			"CreatedAt":    expectedCreated,
+			"HealthCheck":  "",
 			"ID":           "containerID2",
 			"Image":        "ubuntu",
 			"Labels":       "",
@@ -528,6 +530,7 @@ func TestContainerContextWriteJSON(t *testing.T) {
 		{
 			"Command":      `""`,
 			"CreatedAt":    expectedCreated,
+			"HealthCheck":  "",
 			"ID":           "containerID3",
 			"Image":        "ubuntu",
 			"Labels":       "",
@@ -615,6 +618,7 @@ func TestContainerBackCompat(t *testing.T) {
 		{field: "Image", expected: "docker.io/library/ubuntu"},
 		{field: "Command", expected: `"/bin/sh"`},
 		{field: "CreatedAt", expected: time.Unix(createdAtTime.Unix(), 0).String()},
+		{field: "HealthCheck", expected: ""},
 		{field: "RunningFor", expected: "12 months ago"},
 		{field: "Ports", expected: "8080/tcp"},
 		{field: "Status", expected: "running"},

docs/reference/commandline/container_ls.md

@@ -405,6 +405,7 @@ Valid placeholders for the Go template are listed below:
 | `.Ports`      | Exposed ports.                                                                                  |
 | `.State`      | Container status (for example; "created", "running", "exited").                                 |
 | `.Status`     | Container status with details about duration and health-status.                                 |
+| `.HealthCheck`| Container health status ("starting", "healthy", "unhealthy", or "none"; empty when unavailable).|
 | `.Size`       | Container disk size.                                                                            |
 | `.Names`      | Container names.                                                                                |
 | `.Labels`     | All labels assigned to the container.                                                           |