Implement bash and zsh completions.

completions/bash/cdist-completion.bash

@@ -0,0 +1,59 @@
+_cdist()
+{
+    local cur prev prevprev opts cmds projects
+    COMPREPLY=()
+    cur="${COMP_WORDS[COMP_CWORD]}"
+    prev="${COMP_WORDS[COMP_CWORD-1]}"
+    prevprev="${COMP_WORDS[COMP_CWORD-2]}"
+    opts="-h --help -d --debug -v --verbose -V --version"
+    cmds="banner shell config"
+
+    case "${prevprev}" in
+        shell)
+            case "${prev}" in
+                -s|--shell)
+                    shells=$(grep -v '^#' /etc/shells)
+                    COMPREPLY=( $(compgen -W "${shells}" -- ${cur}) )
+                    return 0
+                    ;;
+            esac
+            ;;
+    esac
+
+    case "${prev}" in
+        -*)
+            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+            return 0
+            ;;
+        banner)
+            opts="-h --help -d --debug -v --verbose"
+            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+            return 0
+            ;;
+        shell)
+            opts="-h --help -d --debug -v --verbose -s --shell"
+            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+            return 0
+            ;;
+        config)
+            opts="-h --help -d --debug -v --verbose \
+                -c --conf-dir -f --file -i --initial-manifest -n --dry-run \
+                -o --out-dir -p --parallel -s --sequential --remote-copy \
+                --remote-exec"
+            COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+            return 0
+            ;;
+        *)
+            ;;
+    esac
+
+    if [[ ${cur} == -* ]]; then 
+    	COMPREPLY=( $(compgen -W "${opts}" -- ${cur}) )
+    	return 0
+    fi
+
+    COMPREPLY=( $(compgen -W "${cmds}" -- ${cur}) )
+    return 0
+}
+
+complete -F _cdist cdist