feat(cmd/network): Add network set-chain-context subcommand

cmd/network/network.go

@@ -55,6 +55,7 @@ func init() {
 	Cmd.AddCommand(governance.Cmd)
 	Cmd.AddCommand(listCmd)
 	Cmd.AddCommand(rmCmd)
+	Cmd.AddCommand(setChainContextCmd)
 	Cmd.AddCommand(setDefaultCmd)
 	Cmd.AddCommand(setRPCCmd)
 	Cmd.AddCommand(showCmd)

cmd/network/set_chain_context.go

@@ -0,0 +1,30 @@
+package network
+
+import (
+	"fmt"
+
+	"github.com/spf13/cobra"
+
+	cliConfig "github.com/oasisprotocol/cli/config"
+)
+
+var setChainContextCmd = &cobra.Command{
+	Use:   "set-chain-context <name> <chain-context>",
+	Short: "Sets the chain context of the given network",
+	Args:  cobra.ExactArgs(2),
+	Run: func(cmd *cobra.Command, args []string) {
+		cfg := cliConfig.Global()
+		name, chainContext := args[0], args[1]
+
+		net := cfg.Networks.All[name]
+		if net == nil {
+			cobra.CheckErr(fmt.Errorf("network '%s' does not exist", name))
+			return // To make staticcheck happy as it doesn't know CheckErr exits.
+		}
+
+		net.ChainContext = chainContext
+
+		err := cfg.Save()
+		cobra.CheckErr(err)
+	},
+}