gallan: enable basic tab completion for orc, that can provide all available options, and suggest an application and environment.

Author: Graham Allan

Rakefile

@@ -30,6 +30,9 @@ task :package do
   sh 'mkdir -p build/package/usr/local/bin/'
   sh 'cp -r bin/* build/package/usr/local/bin/'
 
+  sh 'mkdir -p build/package/etc'
+  sh 'cp -r etc/* build/package/etc'
+
   arguments = [
     '--description', 'orchestration tool',
     '--url', 'https://github.com/tim-group/orc',

etc/bash_completion.d/orc

@@ -0,0 +1,33 @@
+# Provides bash completion for the orc command
+# Currently supports completing all long options, environment and application.
+#
+# Potential improvements:
+#   * the set of options should be generated by orc code, so it remains in sync when new options are added
+#   * once --environment has been specified, filter applications to only those in that environment, and vice-versa
+
+_orc()
+{
+  CMDB_HOME=$HOME/.cmdb
+
+  local cur=${COMP_WORDS[COMP_CWORD]}
+  local prev=${COMP_WORDS[COMP_CWORD-1]}
+
+  case "$prev" in
+    -e|--environment)
+      local all_environments="$(ls -1 $CMDB_HOME)"
+      COMPREPLY=( $(compgen -W "${all_environments}" -- "$cur" ))
+      return 0
+      ;;
+    -a|--application)
+      local all_applications="$(find $CMDB_HOME -name "*.yaml" -type f -exec basename {} ';' | sed -e 's/.yaml//g' | sort | uniq )"
+      COMPREPLY=( $(compgen -W "${all_applications}" -- "$cur" ))
+      return 0
+      ;;
+  esac
+
+  COMPREPLY=( $(compgen -W "--debug --environment --promote-from --application\
+                            --version --group --status --deploy --install \
+                            --limited-install --swap --resolve --promote" -- "$cur") )
+
+}
+complete -F _orc orc