Document CLI options for istio_ca (#441)

* Generate documentation for istio_ca

* linter

_docs/reference/commands/istio_ca.md

@@ -0,0 +1,72 @@
+---
+title: istio_ca
+overview: Istio Certificate Authority (CA)
+layout: docs
+order: 301
+type: markdown
+---
+
+<a name="istio_ca_cmd"></a>
+## istio_ca
+
+Istio Certificate Authority (CA)
+
+### Synopsis
+
+
+Istio Certificate Authority (CA)
+
+```
+istio_ca [flags]
+```
+
+### Options
+
+```
+      --alsologtostderr                  log to standard error as well as files
+      --ca-cert-ttl duration             The TTL of self-signed CA root certificate (default 8760h0m0s)
+      --cert-chain string                Speicifies path to the certificate chain file
+      --cert-ttl duration                The TTL of issued certificates (default 1h0m0s)
+      --grpc-hostname string             Specifies the hostname for GRPC server. (default "localhost")
+      --grpc-port int                    Specifies the port number for GRPC server. If unspecified, Istio CA will not server GRPC request.
+      --kube-config string               Specifies path to kubeconfig file. This must be specified when not running inside a Kubernetes pod.
+      --log_backtrace_at traceLocation   when logging hits line file:N, emit a stack trace (default :0)
+      --log_dir string                   If non-empty, write log files in this directory
+      --logtostderr                      log to standard error instead of files
+      --namespace string                 Select a namespace for the CA to listen to. If unspecified, Istio CA tries to use the ${NAMESPACE} environment variable. If neither is set, Istio CA listens to all namespaces.
+      --root-cert string                 Specifies path to the root certificate file
+      --self-signed-ca                   Indicates whether to use auto-generated self-signed CA certificate. When set to true, the '--signing-cert' and '--signing-key' options are ignored.
+      --self-signed-ca-org string        The issuer organization used in self-signed CA certificate (default to k8s.cluster.local) (default "k8s.cluster.local")
+      --signing-cert string              Specifies path to the CA signing certificate file
+      --signing-key string               Specifies path to the CA signing key file
+      --stderrthreshold severity         logs at or above this threshold go to stderr (default 2)
+  -v, --v Level                          log level for V logs
+      --vmodule moduleSpec               comma-separated list of pattern=N settings for file-filtered logging
+```
+
+<a name="istio_ca_version"></a>
+## istio_ca version
+
+Display version information
+
+### Synopsis
+
+
+Display version information
+
+```
+istio_ca version
+```
+
+### Options inherited from parent commands
+
+```
+      --alsologtostderr                  log to standard error as well as files
+      --log_backtrace_at traceLocation   when logging hits line file:N, emit a stack trace (default :0)
+      --log_dir string                   If non-empty, write log files in this directory
+      --logtostderr                      log to standard error instead of files
+      --stderrthreshold severity         logs at or above this threshold go to stderr (default 2)
+  -v, --v Level                          log level for V logs
+      --vmodule moduleSpec               comma-separated list of pattern=N settings for file-filtered logging
+```
+

scripts/generate-cli-docs.sh

@@ -6,6 +6,10 @@ set -o pipefail
 
 # TODO(REVIEWER): how do we want to handle finding the two binaries? set a default and try, or abort?
 ISTIOCTL=${ISTIOCTL:-istioctl}
+if [[ -z "${ISTIO_CA_CLI}" ]]; then
+    echo "No istio_ca command defined via the environment variable ISTIO_CA_CLI"
+    exit 1
+fi
 if [[ -z "${MIXCOL_CLI}" ]]; then
     echo "No mixcol command defined via the environment variable MIXCOL_CLI"
     exit 1
@@ -98,6 +102,7 @@ function processPerBinaryFiles() {
 # Generate our output
 ${MIXCOL_CLI} -o ${WORKING_DIR}
 ${ISTIOCTL} markdown --dir ${WORKING_DIR}
+${ISTIO_CA_CLI} markdown --dir ${WORKING_DIR}
 
 # Clean up the target directory
 mkdir -p ${OUTPUT_DIR}
@@ -107,5 +112,6 @@ generateIndex > ${OUTPUT_DIR}/index.md
 processPerBinaryFiles "istioctl" 1 > ${OUTPUT_DIR}/istioctl.md
 processPerBinaryFiles "mixc" 101 >  ${OUTPUT_DIR}/mixc.md
 processPerBinaryFiles "mixs" 201 >  ${OUTPUT_DIR}/mixs.md
+processPerBinaryFiles "istio_ca" 301 >  ${OUTPUT_DIR}/istio_ca.md
 
 rm -rfd ${WORKING_DIR}