From 5f304686f7d41cd07b0e8e4cdaf0279b27101be4 Mon Sep 17 00:00:00 2001
From: Quentin Duchemin <quentinduchemin@tuta.io>
Date: Sat, 28 Oct 2023 23:13:37 +0200
Subject: [PATCH] Handle prepending for custom env conf, fix bugs in external
 conf

---
 .init_config.sh | 42 ++++++++++++++++++++++++++++--------------
 1 file changed, 28 insertions(+), 14 deletions(-)

diff --git a/.init_config.sh b/.init_config.sh
index 817484d..7b8a562 100755
--- a/.init_config.sh
+++ b/.init_config.sh
@@ -19,8 +19,10 @@ POLYBAR_CONFIG="polybar"
 ARCH_PACKAGES="bootstrap"
 MERGE_DIRS="${I3_CONFIG} ${POLYBAR_CONFIG} ${ARCH_PACKAGES}"
 
+changed_files="$(git --git-dir=$HOME/.cfg/ --work-tree=$HOME diff-tree -r --name-status --no-commit-id HEAD^1 HEAD)"
+
 # Check if a file has been modified and deleted since last commit, if so perform an action
-# $1 : relative path starting from the folder with "dest"
+# $1 : absolute path of the file
 # $2 : command to launch if file has been created of modifed
 # $3 : command to launch if file has been deleted
 function check_copy() {
@@ -29,15 +31,15 @@ function check_copy() {
 		echo -e "* Running \"$2\"" && eval "$2"
 		return
 	fi
-	echo "$changed_files" | grep --quiet "${1#$HOME/}"
-	if [ $? == "0" ]; then
-		echo "$changed_files" | cut -f 1 | grep --quiet "D"
-		if [ $? == "0" ]; then
+	changed_file=`grep "${1#$HOME/}" <<< "${changed_files}"`
+	if [ ! -z "${changed_file}" ]; then
+		if echo "$changed_file" | grep -q -E "^D"; then
 			echo "* $1 has been removed"
 			echo -e "\t* Running \"$3\"" && eval "$3"
-		else
-			echo "* Changes detected in $1"
-			echo -e "* Running \"$2\"" && eval "$2"
+		fi
+		if echo "$changed_file" | grep -q -E "^(A|M)"; then
+			echo "* Changes detected in $(basename $1)"
+			echo -e "\t* Running \"$2\"" && eval "$2"
 		fi
 	else
 		echo "$1 not modified, no need to copy"
@@ -49,6 +51,7 @@ function check_copy() {
 # a common base for multiple computer, and per-computer stuff.
 # $1 : path of the folder 
 # $2 : optional current environment
+# $3 : if defined, prepend $2 instead of appending
 function merge_config() {
 	echo -e "\n=== Generate ${m} config file ==="
 	rm -f ${CONFIG}/${m}/${FINAL_CONFIG}
@@ -58,8 +61,17 @@ function merge_config() {
 	# If there is an override folder, merge given env
 	if [ ! -z ${2} ] && [ -d ${CONFIG}/${m}/${MERGE_CONFIG_FOLDER} ]; then
 		for f in `find ${CONFIG}/${m}/config.d -type f -path "*${2}"`; do
-			echo "Found ${f}, add to regular config file"
-			cat "${f}" >> ${CONFIG}/${m}/${FINAL_CONFIG}
+			final_path=${CONFIG}/${m}/${FINAL_CONFIG}
+			if [ ! -z $3 ]; then 
+				echo "Found ${f}, append to regular config file"
+				cat "${f}" >> ${final_path}
+			else
+				echo "Found ${f}, prepend to regular config file"
+				cat ${f} > /tmp/config
+				echo -e '\n' >> /tmp/config
+				cat ${final_path} >> /tmp/config
+				mv /tmp/config ${final_path}
+			fi
 		done
 	fi
 }
@@ -75,10 +87,12 @@ CONFIG=${XDG_CONFIG_HOME:-$HOME/.config}
 
 ENV=${1}
 
-changed_files="$(git --git-dir=$HOME/.cfg/ --work-tree=$HOME diff-tree -r --name-status --no-commit-id HEAD^1 HEAD)"
-
 for m in ${MERGE_DIRS}; do
-	merge_config $m ${ENV}
+	if [ -f ${m}/above ]; then
+		merge_config $m ${ENV} true
+	else
+		merge_config $m ${ENV}
+	fi
 done
 
 if [ ! -z "$INIT" ]; then
@@ -147,7 +161,7 @@ for f in `find ${CONFIG} -type f -name ${DEST_FILENAME}`; do
 		real_dest=${DEST}/${subfolder}
                 sudo mkdir -p ${real_dest}
 		absolute_source=`realpath "${DIR}/${config_file}"`
-		check_copy "${filename}" "sudo cp ${absolute_source} ${real_dest}" "sudo rm ${real_dest}/${filename}"
+		check_copy "${absolute_source}" "sudo cp ${absolute_source} ${real_dest}" "sudo rm ${real_dest}/${filename}"
 	done
 done