feat(cli): allow setting default values for Control Plane and CAS endpoints endpoints at the CLI build time

Signed-off-by: Daniel Liszka <daniel@chainloop.dev>

Author: danlishka

app/cli/cmd/root.go

@@ -37,6 +37,8 @@ var (
 	flagOutputFormat string
 	actionOpts       *action.ActionsOpts
 	logger           zerolog.Logger
+	defaultCpAPI     = "api.cp.chainloop.dev:443"
+	defaultCasAPI    = "api.cas.chainloop.dev:443"
 )
 
 const useWorkflowRobotAccount = "withWorkflowRobotAccount"
@@ -92,11 +94,12 @@ func NewRootCmd(l zerolog.Logger) *cobra.Command {
 	rootCmd.SetHelpCommand(&cobra.Command{Hidden: true})
 
 	rootCmd.PersistentFlags().StringVarP(&flagCfgFile, "config", "c", "", "Path to an existing config file (default is $HOME/.config/chainloop/config.toml)")
-	rootCmd.PersistentFlags().String(confOptions.controlplaneAPI.flagName, "api.cp.chainloop.dev:443", "URL for the Control Plane API")
+
+	rootCmd.PersistentFlags().String(confOptions.controlplaneAPI.flagName, defaultCpAPI, "URL for the Control Plane API")
 	err := viper.BindPFlag(confOptions.controlplaneAPI.viperKey, rootCmd.PersistentFlags().Lookup(confOptions.controlplaneAPI.flagName))
 	cobra.CheckErr(err)
 
-	rootCmd.PersistentFlags().String(confOptions.CASAPI.flagName, "api.cas.chainloop.dev:443", "URL for the Artifacts Content Addressable Storage (CAS)")
+	rootCmd.PersistentFlags().String(confOptions.CASAPI.flagName, defaultCasAPI, "URL for the Artifacts Content Addressable Storage (CAS)")
 	err = viper.BindPFlag(confOptions.CASAPI.viperKey, rootCmd.PersistentFlags().Lookup(confOptions.CASAPI.flagName))
 	cobra.CheckErr(err)
 

devel/README.md

@@ -69,3 +69,41 @@ You will get redirected to the pre-configured local OIDC provider (DEX) where th
 - `john@chainloop.local`/`password`
 
 Once logged in, please refer to our [Getting Started guide](https://docs.chainloop.dev/getting-started/setup) to learn how to setup an OCI registry.
+
+## Building CLI
+### Updating default values
+
+By default the Chainloop command line tool uses the following values for the Control Plane and Artifacts CAS API endpoints:
+
+- Artifacts CAS: api.cas.chainloop.dev:443
+- Control Plane API: api.cp.chainloop.dev:443
+
+You can review them in the Chainloop CLI help message.
+
+```
+Flags:
+      --artifact-cas string    URL for the Artifacts Content Addressable Storage (CAS) (default "api.cas.chainloop.dev:443")
+  -c, --config string          Path to an existing config file (default is $HOME/.config/chainloop/config.toml)
+      --control-plane string   URL for the Control Plane API (default "api.cp.chainloop.dev:443")
+```
+
+If you want to change these default values to your custom endpoints, you can do that at the command line build time. Please take a look at some examples below:
+
+**Example 1** Building the Chainloop CLI:
+
+```
+cd chainloop
+go build app/cli/main.go
+```
+
+**Example 2** Set the default value for the Artifacts CAS endpoint. We will use `ldflags` and the `defaultCasAPI` variable. We assume in this example that we have our instance of CAS running at the following location: `api.cas.acme.com:443`.
+
+```
+go build -ldflags "-X 'github.com/chainloop-dev/chainloop/app/cli/cmd.defaultCasAPI=api.cas.acme.com:443'" app/cli/main.go
+```
+
+**Example 3** Set both the Artifacts CAS and Control Plane endpoints. We use two variables here: `defaultCasAPI` and `defaultCpAPI`.
+
+```
+go build -ldflags "-X 'github.com/chainloop-dev/chainloop/app/cli/cmd.defaultCasAPI=api.cas.acme.com:443' -X 'github.com/chainloop-dev/chainloop/app/cli/cmd.defaultCpAPI=api.cp.acme.com:443'" app/cli/main.go
+```