Make chains namespace configurable

This makes chains namespace configurable with new flag
chains-namespace where you can specify in which namespace
the chains is configured, by default it is tekton-chains

Do refacotring in chains cmd code

Update docs

docs/cmd/tkn.md

@@ -21,7 +21,7 @@ CLI for tekton pipelines
 ### SEE ALSO
 
 * [tkn bundle](tkn_bundle.md)	 - Manage Tekton Bundles
-* [tkn chains](tkn_chains.md)	 - Manage Tekton Chains
+* [tkn chain](tkn_chain.md)	 - Manage Chains
 * [tkn clustertask](tkn_clustertask.md)	 - Manage ClusterTasks
 * [tkn clustertriggerbinding](tkn_clustertriggerbinding.md)	 - Manage ClusterTriggerBindings
 * [tkn completion](tkn_completion.md)	 - Prints shell completion scripts

docs/cmd/tkn_chain.md

@@ -0,0 +1,33 @@
+## tkn chain
+
+Manage Chains
+
+***Aliases**: chains*
+
+### Usage
+
+```
+tkn chain
+```
+
+### Synopsis
+
+Manage Chains
+
+### Options
+
+```
+      --chains-namespace string   namespace in which chains is installed (default "tekton-chains")
+  -c, --context string            name of the kubeconfig context to use (default: kubectl config current-context)
+  -h, --help                      help for chain
+  -k, --kubeconfig string         kubectl config file (default: $HOME/.kube/config)
+  -n, --namespace string          namespace to use (default: from $KUBECONFIG)
+  -C, --no-color                  disable coloring (default: false)
+```
+
+### SEE ALSO
+
+* [tkn](tkn.md)	 - CLI for tekton pipelines
+* [tkn chain payload](tkn_chain_payload.md)	 - Print Tekton Chains' payload for a specific taskrun
+* [tkn chain signature](tkn_chain_signature.md)	 - Print Tekton Chains' signature for a specific taskrun
+

docs/cmd/tkn_chains_payload.md → docs/cmd/tkn_chain_payload.md

@@ -1,16 +1,16 @@
-## tkn chains payload
+## tkn chain payload
 
-Print a Tekton chains' payload for a specific taskrun
+Print Tekton Chains' payload for a specific taskrun
 
 ### Usage
 
 ```
-tkn chains payload
+tkn chain payload
 ```
 
 ### Synopsis
 
-Print a Tekton chains' payload for a specific taskrun
+Print Tekton Chains' payload for a specific taskrun
 
 ### Options
 
@@ -26,10 +26,14 @@ Print a Tekton chains' payload for a specific taskrun
 ### Options inherited from parent commands
 
 ```
-  -C, --no-color   disable coloring (default: false)
+      --chains-namespace string   namespace in which chains is installed (default "tekton-chains")
+  -c, --context string            name of the kubeconfig context to use (default: kubectl config current-context)
+  -k, --kubeconfig string         kubectl config file (default: $HOME/.kube/config)
+  -n, --namespace string          namespace to use (default: from $KUBECONFIG)
+  -C, --no-color                  disable coloring (default: false)
 ```
 
 ### SEE ALSO
 
-* [tkn chains](tkn_chains.md)	 - Manage Tekton Chains
+* [tkn chain](tkn_chain.md)	 - Manage Chains
 

docs/cmd/tkn_chain_signature.md

@@ -0,0 +1,34 @@
+## tkn chain signature
+
+Print Tekton Chains' signature for a specific taskrun
+
+### Usage
+
+```
+tkn chain signature
+```
+
+### Synopsis
+
+Print Tekton Chains' signature for a specific taskrun
+
+### Options
+
+```
+  -h, --help   help for signature
+```
+
+### Options inherited from parent commands
+
+```
+      --chains-namespace string   namespace in which chains is installed (default "tekton-chains")
+  -c, --context string            name of the kubeconfig context to use (default: kubectl config current-context)
+  -k, --kubeconfig string         kubectl config file (default: $HOME/.kube/config)
+  -n, --namespace string          namespace to use (default: from $KUBECONFIG)
+  -C, --no-color                  disable coloring (default: false)
+```
+
+### SEE ALSO
+
+* [tkn chain](tkn_chain.md)	 - Manage Chains
+

docs/man/man1/tkn-chains-payload.1 → docs/man/man1/tkn-chain-payload.1

@@ -1,21 +1,21 @@
-.TH "TKN\-CHAINS\-PAYLOAD" "1" "" "Auto generated by spf13/cobra" "" 
+.TH "TKN\-CHAIN\-PAYLOAD" "1" "" "Auto generated by spf13/cobra" "" 
 .nh
 .ad l
 
 
 .SH NAME
 .PP
-tkn\-chains\-payload \- Print a Tekton chains' payload for a specific taskrun
+tkn\-chain\-payload \- Print Tekton Chains' payload for a specific taskrun
 
 
 .SH SYNOPSIS
 .PP
-\fBtkn chains payload\fP
+\fBtkn chain payload\fP
 
 
 .SH DESCRIPTION
 .PP
-Print a Tekton chains' payload for a specific taskrun
+Print Tekton Chains' payload for a specific taskrun
 
 
 .SH OPTIONS
@@ -46,11 +46,27 @@ Print a Tekton chains' payload for a specific taskrun
 
 
 .SH OPTIONS INHERITED FROM PARENT COMMANDS
+.PP
+\fB\-\-chains\-namespace\fP="tekton\-chains"
+    namespace in which chains is installed
+
+.PP
+\fB\-c\fP, \fB\-\-context\fP=""
+    name of the kubeconfig context to use (default: kubectl config current\-context)
+
+.PP
+\fB\-k\fP, \fB\-\-kubeconfig\fP=""
+    kubectl config file (default: $HOME/.kube/config)
+
+.PP
+\fB\-n\fP, \fB\-\-namespace\fP=""
+    namespace to use (default: from $KUBECONFIG)
+
 .PP
 \fB\-C\fP, \fB\-\-no\-color\fP[=false]
     disable coloring (default: false)
 
 
 .SH SEE ALSO
 .PP
-\fBtkn\-chains(1)\fP
+\fBtkn\-chain(1)\fP

docs/man/man1/tkn-chain-signature.1

@@ -0,0 +1,51 @@
+.TH "TKN\-CHAIN\-SIGNATURE" "1" "" "Auto generated by spf13/cobra" "" 
+.nh
+.ad l
+
+
+.SH NAME
+.PP
+tkn\-chain\-signature \- Print Tekton Chains' signature for a specific taskrun
+
+
+.SH SYNOPSIS
+.PP
+\fBtkn chain signature\fP
+
+
+.SH DESCRIPTION
+.PP
+Print Tekton Chains' signature for a specific taskrun
+
+
+.SH OPTIONS
+.PP
+\fB\-h\fP, \fB\-\-help\fP[=false]
+    help for signature
+
+
+.SH OPTIONS INHERITED FROM PARENT COMMANDS
+.PP
+\fB\-\-chains\-namespace\fP="tekton\-chains"
+    namespace in which chains is installed
+
+.PP
+\fB\-c\fP, \fB\-\-context\fP=""
+    name of the kubeconfig context to use (default: kubectl config current\-context)
+
+.PP
+\fB\-k\fP, \fB\-\-kubeconfig\fP=""
+    kubectl config file (default: $HOME/.kube/config)
+
+.PP
+\fB\-n\fP, \fB\-\-namespace\fP=""
+    namespace to use (default: from $KUBECONFIG)
+
+.PP
+\fB\-C\fP, \fB\-\-no\-color\fP[=false]
+    disable coloring (default: false)
+
+
+.SH SEE ALSO
+.PP
+\fBtkn\-chain(1)\fP

docs/man/man1/tkn-chain.1

@@ -0,0 +1,49 @@
+.TH "TKN\-CHAIN" "1" "" "Auto generated by spf13/cobra" "" 
+.nh
+.ad l
+
+
+.SH NAME
+.PP
+tkn\-chain \- Manage Chains
+
+
+.SH SYNOPSIS
+.PP
+\fBtkn chain\fP
+
+
+.SH DESCRIPTION
+.PP
+Manage Chains
+
+
+.SH OPTIONS
+.PP
+\fB\-\-chains\-namespace\fP="tekton\-chains"
+    namespace in which chains is installed
+
+.PP
+\fB\-c\fP, \fB\-\-context\fP=""
+    name of the kubeconfig context to use (default: kubectl config current\-context)
+
+.PP
+\fB\-h\fP, \fB\-\-help\fP[=false]
+    help for chain
+
+.PP
+\fB\-k\fP, \fB\-\-kubeconfig\fP=""
+    kubectl config file (default: $HOME/.kube/config)
+
+.PP
+\fB\-n\fP, \fB\-\-namespace\fP=""
+    namespace to use (default: from $KUBECONFIG)
+
+.PP
+\fB\-C\fP, \fB\-\-no\-color\fP[=false]
+    disable coloring (default: false)
+
+
+.SH SEE ALSO
+.PP
+\fBtkn(1)\fP, \fBtkn\-chain\-payload(1)\fP, \fBtkn\-chain\-signature(1)\fP