$ helm install wordpress stable/wordpress --namespace wordpress --create-namespace

⋊> ~/g/s/g/h/h/bin on fix-6794 ⨯ ./helm version
version.BuildInfo{Version:"v3.1+unreleased", GitCommit:"694cf61aacba6bc4ed59a65d23acd20f6c8b95bd", GitTreeState:"clean", GoVersion:"go1.12.12"}

⋊> ~/g/s/g/h/h/bin on fix-6794 ⨯ git log | head
commit 694cf61aacba6bc4ed59a65d23acd20f6c8b95bd
Author: Matthew Fisher <matt.fisher@microsoft.com>
Date:   Thu Feb 20 11:56:03 2020 -0800

    feat(install): introduce --create-namespace

    Signed-off-by: Matthew Fisher <matt.fisher@microsoft.com>

commit f7bcdf194b8782c10ec476a77929807199ad9baf
Merge: 99304c86 2a742

⋊> ~/g/s/g/h/h/bin on fix-6794 ⨯ ./helm create foo
Creating foo

⋊> ~/g/s/g/h/h/bin on fix-6794 ⨯ ls -l
total 41068
drwxr-xr-x 4 illya illya     4096 Feb 20 16:41 bar/
drwxr-xr-x 4 illya illya     4096 Feb 24 10:48 foo/
-rwxr-xr-x 1 illya illya 42038352 Feb 24 10:48 helm*

⋊> ~/g/s/g/h/h/bin on fix-6794 ⨯ ./helm install foo ./foo
NAME: foo
LAST DEPLOYED: Mon Feb 24 10:48:49 2020
NAMESPACE: default
STATUS: deployed
REVISION: 1
NOTES:
1. Get the application URL by running these commands:
  export POD_NAME=$(kubectl get pods --namespace default -l "app.kubernetes.io/name=foo,app.kubernetes.io/instance=foo" -o jsonpath="{.items[0].metadata.name}")
  echo "Visit http://127.0.0.1:8080 to use your application"
  kubectl --namespace default port-forward $POD_NAME 8080:80

⋊> ~/g/s/g/h/h/bin on fix-6794 ⨯ kubectl get all
NAME                      READY   STATUS    RESTARTS   AGE
pod/foo-9458c558d-24nbw   1/1     Running   0          9s

NAME                 TYPE        CLUSTER-IP    EXTERNAL-IP   PORT(S)   AGE
service/foo          ClusterIP   10.99.16.16   <none>        80/TCP    9s
service/kubernetes   ClusterIP   10.96.0.1     <none>        443/TCP   24d

NAME                  READY   UP-TO-DATE   AVAILABLE   AGE
deployment.apps/foo   1/1     1            1           9s

NAME                            DESIRED   CURRENT   READY   AGE
replicaset.apps/foo-9458c558d   1         1         1       9s

⋊> ~/g/s/g/h/h/bin on fix-6794 ⨯ ./helm list
NAME    NAMESPACE       REVISION        UPDATED                                 STATUS          CHART           APP VERSION
foo     default         1               2020-02-24 10:48:49.656651438 -0800 PST deployed        foo-0.1.0       1.16.0

⋊> ~/g/s/g/h/h/bin on fix-6794 ⨯ helm delete foo
release "foo" uninstalled

# Verify that artifacts were removed
⋊> ~/g/s/g/h/h/bin on fix-6794 ⨯ kubectl get all
NAME                      READY   STATUS        RESTARTS   AGE
pod/foo-9458c558d-24nbw   0/1     Terminating   0          22s

NAME                 TYPE        CLUSTER-IP   EXTERNAL-IP   PORT(S)   AGE
service/kubernetes   ClusterIP   10.96.0.1    <none>        443/TCP   24d

# List all namespaces
⋊> ~/g/s/g/h/h/bin on fix-6794 ⨯ kubectl get ns
NAME              STATUS   AGE
bar               Active   3d17h
default           Active   24d
kube-node-lease   Active   24d
kube-public       Active   24d
kube-system       Active   24d

⋊> ~/g/s/g/h/h/bin on fix-6794 ⨯ helm install foo ./foo -n foo
Error: create: failed to create: namespaces "foo" not found

# Install helm chart into non-existing namespace with flag `--create-namespace`
⋊> ~/g/s/g/h/h/bin on fix-6794 ⨯ helm install foo ./foo -n foo --create-namespace
Error: unknown flag: --create-namespace

# Repeat with `--namespace` vs. `-n`
⋊> ~/g/s/g/h/h/bin on fix-6794 ⨯ helm install foo ./foo --namespace foo --create-namespace
Error: unknown flag: --create-namespace

⋊> ~/g/s/g/h/h/bin on fix-6794 ⨯ ./helm install foo ./foo --namespace foo --create-namespace
NAME: foo
LAST DEPLOYED: Mon Feb 24 11:03:07 2020
NAMESPACE: foo
STATUS: deployed
REVISION: 1
NOTES:
1. Get the application URL by running these commands:
  export POD_NAME=$(kubectl get pods --namespace foo -l "app.kubernetes.io/name=foo,app.kubernetes.io/instance=foo" -o jsonpath="{.items[0].metadata.name}")
  echo "Visit http://127.0.0.1:8080 to use your application"
  kubectl --namespace foo port-forward $POD_NAME 8080:80

⋊> ~/g/s/g/h/h/bin on fix-6794 ⨯ kubectl get ns
NAME              STATUS   AGE
bar               Active   3d17h
default           Active   24d
foo               Active   15s
kube-node-lease   Active   24d
kube-public       Active   24d
kube-system       Active   24d