Add bash completion support. Fix #218

.gitignore

@@ -4,4 +4,4 @@ bin
 .dub
 dub.selections.json
 .gdb_history
-dfmt
+bin/dfmt

bash-completion/completion/dfmt

@@ -0,0 +1,45 @@
+# Completion for dfmt
+_dfmt()
+{
+	local cur prev opts
+	COMPREPLY=()
+	cur="${COMP_WORDS[COMP_CWORD]}"
+    prev="${COMP_WORDS[COMP_CWORD-1]}"
+    opts="--help -h --inplace -i --version --align_switch_statements --brace_style\
+		--end_of_line --indent_size --indent_style -t --soft_max_line_length\
+		--max_line_length --outdent_attributes --space_after_cast\
+		--selective_import_space --split_operator_at_line_end\
+		--compact_labeled_statements --template_constraint_style"
+	eolOpts="lf cr crlf"
+	braceOpts="allman otbs stroustrup"
+	indentOpts="tab space"
+	constraintOpts="conditional_newline_indent conditional_newline always_newline always_newline_indent"
+	if [[ ${cur} == -* ]]; then
+		COMPREPLY=($(compgen -W "${opts}" -- ${cur}))
+		return 0;
+	fi
+	case "${prev}" in
+		"--brace_style")
+			COMPREPLY=($(compgen -W "${braceOpts}" -- ${cur}))
+			return 0
+			;;
+		"--end_of_line")
+			COMPREPLY=($(compgen -W "${eolOpts}" -- ${cur}))
+			return 0
+			;;
+		"-t")
+			;&
+		"--indent_style")
+			COMPREPLY=($(compgen -W "${indentOpts}" -- ${cur}))
+			return 0
+			;;
+		"--template_constraint_style")
+			COMPREPLY=($(compgen -W "${constraintOpts}" -- ${cur}))
+			return 0
+			;;
+		*)
+			;;
+	esac
+	COMPREPLY=($(compgen -W "${opts}" -- ${cur}))
+}
+complete -F _dfmt dfmt