Merge pull request #2 from cytopia/release-0.2

Be 100% posix and remove bash as a dependency to shrink size

Author: cytopia

Dockerfile

@@ -33,14 +33,13 @@ RUN set -eux \
 	&& chmod +x /usr/bin/terraform
 
 # Use a clean tiny image to store artifacts in
-FROM alpine:3.9
+FROM alpine:3.8
 LABEL \
 	maintainer="cytopia <[email protected]>" \
 	repo="https://github.com/cytopia/docker-terragrunt-fmt"
-RUN set -eux \
-	&& apk add --no-cache bash
 COPY --from=builder /usr/bin/terraform /usr/bin/terraform
 COPY data/terragrunt-fmt.sh /terragrunt-fmt.sh
+COPY data/fmt.sh /fmt.sh
 
 WORKDIR /data
 ENTRYPOINT ["/terragrunt-fmt.sh"]

data/fmt.sh

@@ -0,0 +1,70 @@
+#!/bin/sh
+
+# Be strict
+set -e
+set -u
+
+###
+### Inputs
+###
+_list="${1}"
+_write="${2}"
+_diff="${3}"
+_check="${4}"
+_file="${5}"
+# shellcheck disable=SC2155
+_temp="/tmp/$(basename "${_file}").tf"
+_ret=0
+
+
+###
+### Build command (only append if default values are overwritten)
+###
+_cmd="terraform fmt"
+if [ "${_list}" = "0" ]; then
+	_cmd="${_cmd} -list=false"
+else
+	_cmd="${_cmd} -list=true"
+fi
+if [ "${_write}" = "1" ]; then
+	_cmd="${_cmd} -write=true"
+else
+	_cmd="${_cmd} -write=false"
+fi
+if [ "${_diff}" = "1" ]; then
+	_cmd="${_cmd} -diff"
+fi
+if [ "${_check}" = "1" ]; then
+	_cmd="${_cmd} -check"
+fi
+
+###
+### Output and execute command
+###
+echo "${_cmd} ${_file}"
+cp -f "${_file}" "${_temp}"
+if ! eval "${_cmd} ${_temp}"; then
+	_ret=1
+fi
+
+###
+### If -write was specified, copy file back
+###
+if [ "${_write}" = "1" ]; then
+	# Get owner and permissions of current file
+	_UID="$(stat -c %u "${_file}")"
+	_GID="$(stat -c %g "${_file}")"
+	_PERM="$(stat -c %a "${_file}")"
+
+	# Adjust permissions of temporary file
+	chown ${_UID}:${_GID} "${_temp}"
+	chmod ${_PERM} "${_temp}"
+
+	# Overwrite existing file
+	mv -f "${_temp}" "${_file}"
+fi
+
+###
+### Exit
+###
+exit "${_ret}"

data/terragrunt-fmt.sh

@@ -1,9 +1,8 @@
-#!/usr/bin/env bash
+#!/bin/sh
 
 # Be strict
 set -e
 set -u
-set -o pipefail
 
 
 # --------------------------------------------------------------------------------
@@ -55,60 +54,6 @@ print_usage() {
 }
 
 
-_fmt() {
-	local list="${1}"
-	local write="${2}"
-	local diff="${3}"
-	local check="${4}"
-	local file="${5}"
-	# shellcheck disable=SC2155
-	local temp="/tmp/$(basename "${file}").tf"
-	local ret=0
-
-	# Build command (only append if default values are overwritten)
-	local cmd="terraform fmt"
-	if [ "${list}" = "0" ]; then
-		cmd="${cmd} -list=false"
-	else
-		cmd="${cmd} -list=true"
-	fi
-	if [ "${write}" = "1" ]; then
-		cmd="${cmd} -write=true"
-	else
-		cmd="${cmd} -write=false"
-	fi
-	if [ "${diff}" = "1" ]; then
-		cmd="${cmd} -diff"
-	fi
-	if [ "${check}" = "1" ]; then
-		cmd="${cmd} -check"
-	fi
-
-	# Output and execute command
-	echo "${cmd} ${file}"
-	cp -f "${file}" "${temp}"
-	if ! eval "${cmd} ${temp}"; then
-		ret=$(( ret + 1 ))
-	fi
-
-	# If -write was specified, copy file back
-	if [ "${write}" = "1" ]; then
-		# Get owner and permissions of current file
-		_UID="$(stat -c %u "${file}")"
-		_GID="$(stat -c %g "${file}")"
-		_PERM="$(stat -c %a "${file}")"
-
-		# Adjust permissions of temporary file
-		chown ${_UID}:${_GID} "${temp}"
-		chmod ${_PERM} "${temp}"
-
-		# Overwrite existing file
-		mv -f "${temp}" "${file}"
-	fi
-	return "${ret}"
-}
-
-
 # --------------------------------------------------------------------------------
 # ENTRYPOINT (EVALUATE ARGUMENTS)
 # --------------------------------------------------------------------------------
@@ -301,7 +246,7 @@ fi
 ### (1/3) Single file
 ###
 if [ -f "${ARG_PATH}" ]; then
-	_fmt "${ARG_LIST}" "${ARG_WRITE}" "${ARG_DIFF}" "${ARG_CHECK}" "${ARG_PATH}"
+	/fmt.sh "${ARG_LIST}" "${ARG_WRITE}" "${ARG_DIFF}" "${ARG_CHECK}" "${ARG_PATH}"
 	exit "${?}"
 else
 	###
@@ -311,33 +256,37 @@ else
 
 		# evaluate ignore paths
 		if [ -n "${ARG_IGNORE}" ]; then
-			_EXCLUDE=" -not \( -path \"${ARG_PATH}/${ARG_IGNORE//,/*\" -o -path \"${ARG_PATH}\/}*\" \)"
+			_EXCLUDE=" -not \( -path \"${ARG_PATH}/$( echo "${ARG_IGNORE}" | sed 's/,/*/g' )\" -o -path \"${ARG_PATH}\/}*\" \)"
 		else
 			_EXCLUDE=""
 		fi
 
-		find_cmd="find ${ARG_PATH}${_EXCLUDE} -name '*.hcl' -type f -print0"
+		# Store exit code
+		echo "0" > "/tmp/exit.txt"
+
+		find_cmd="find ${ARG_PATH}${_EXCLUDE} -name '*.hcl' -type f"
 		echo "[INFO] Finding files: ${find_cmd}"
-		ret=0
-		while IFS= read -rd '' file; do
-			if ! _fmt "${ARG_LIST}" "${ARG_WRITE}" "${ARG_DIFF}" "${ARG_CHECK}" "${file}"; then
-				ret="1"
-			fi
-		done < <(eval "${find_cmd}")
-		exit "${ret}"
+		eval "${find_cmd} -print0 | xargs -n1 -0 sh -c '\
+			if [ -f \"\${1}\" ]; then \
+				if ! /fmt.sh \"${ARG_LIST}\" \"${ARG_WRITE}\" \"${ARG_DIFF}\" \"${ARG_CHECK}\" \"\${1}\"; then \
+					echo 1 > /tmp/exit.txt; \
+				fi \
+			fi' --"
+
+		# Read exit code and return it
+		exit "$( cat /tmp/exit.txt )"
 
 	###
 	### (3/3) Current directory only
 	###
 	else
-		find_cmd="ls ${ARG_PATH}/*.hcl"
-		echo "[INFO] Finding files: ${find_cmd}"
+		echo "[INFO] Finding files: for file in *.hcl; do"
 		ret=0
-		while IFS= read -r file; do
-			if ! _fmt "${ARG_LIST}" "${ARG_WRITE}" "${ARG_DIFF}" "${ARG_CHECK}" "${file}"; then
+		for file in *.hcl; do
+			if ! /fmt.sh "${ARG_LIST}" "${ARG_WRITE}" "${ARG_DIFF}" "${ARG_CHECK}" "${file}"; then
 				ret="1"
 			fi
-		done < <(eval "${find_cmd}" 2>/dev/null)
+		done
 		exit "${ret}"
 	fi
 fi