Made secret adapters raise a meaningful error if the required CLI is not installed

lib/kamal/secrets/adapters/base.rb

@@ -2,6 +2,7 @@ class Kamal::Secrets::Adapters::Base
   delegate :optionize, to: Kamal::Utils
 
   def fetch(secrets, account:, from: nil)
+    check_dependencies!
     session = login(account)
     full_secrets = secrets.map { |secret| [ from, secret ].compact.join("/") }
     fetch_secrets(full_secrets, account: account, session: session)
@@ -15,4 +16,8 @@ class Kamal::Secrets::Adapters::Base
     def fetch_secrets(...)
       raise NotImplementedError
     end
+
+    def check_dependencies!
+      raise NotImplementedError
+    end
 end

lib/kamal/secrets/adapters/bitwarden.rb

@@ -63,4 +63,13 @@ class Kamal::Secrets::Adapters::Bitwarden < Kamal::Secrets::Adapters::Base
       result = `#{full_command}`.strip
       raw ? result : JSON.parse(result)
     end
+
+    def check_dependencies!
+      raise RuntimeError, "Bitwarden CLI is not installed" unless cli_installed?
+    end
+
+    def cli_installed?
+      `bw --version 2> /dev/null`
+      $?.success?
+    end
 end

lib/kamal/secrets/adapters/last_pass.rb

@@ -27,4 +27,13 @@ class Kamal::Secrets::Adapters::LastPass < Kamal::Secrets::Adapters::Base
         end
       end
     end
+
+    def check_dependencies!
+      raise RuntimeError, "LastPass CLI is not installed" unless cli_installed?
+    end
+
+    def cli_installed?
+      `lpass --version 2> /dev/null`
+      $?.success?
+    end
 end

lib/kamal/secrets/adapters/one_password.rb

@@ -58,4 +58,13 @@ class Kamal::Secrets::Adapters::OnePassword < Kamal::Secrets::Adapters::Base
         raise RuntimeError, "Could not read #{fields.join(", ")} from #{item} in the #{vault} 1Password vault" unless $?.success?
       end
     end
+
+    def check_dependencies!
+      raise RuntimeError, "1Password CLI is not installed" unless cli_installed?
+    end
+
+    def cli_installed?
+      `op --version 2> /dev/null`
+      $?.success?
+    end
 end

lib/kamal/secrets/adapters/test.rb

@@ -7,4 +7,8 @@ class Kamal::Secrets::Adapters::Test < Kamal::Secrets::Adapters::Base
     def fetch_secrets(secrets, account:, session:)
       secrets.to_h { |secret| [ secret, secret.reverse ] }
     end
+
+    def check_dependencies!
+      # no op
+    end
 end