Add dependency handling

Dependencies for any project can be determined by calling
project_dependencies() with a given project and (optional)
arguments. This is the function you will almost always want to call
when you're wanting to collect a list of dependencies. The output of
the topological sort is only one possible ordering of those
dependencies.

'dependencies' files may now contain any number of spaces or tabs
between each argument.

1 files changed, 101 insertions, 4 deletions

diff --git a/libs/project b/libs/project
index b9d33114..cfb886ed 100755
--- a/libs/project
+++ b/libs/project
@@ -60,12 +60,89 @@ project_dependencies() {
 	local project=$1
 	shift
 
-	local -a dependencies
-	mapfile -t dependencies < <(project_file_contents_herit "$project" "$CONFIGS" "$DEPENDENCIES" "$@")
+	if [[ -n "${PROJECTS_FORCE[*]}" ]]; then
+		local expanded
+		local project_force
 
-	if [[ -n ${dependencies[*]} ]]; then
-		printf '%s\n' "${dependencies[@]}"
+		for project_force in "${PROJECTS_FORCE[@]}"; do
+			project_arguments_expand_recursive $project_force | while IFS='' read -r expanded; do
+				project_dependencies_sort $expanded
+			done
+		done
 	fi
+
+	project_dependencies_sort "$project" "$@" | head -n -1
+}
+
+project_dependencies_collect() {
+	local project=$1
+	shift
+
+	local argument
+	local path
+
+	for argument in "" "$@"; do
+		if [[ -z $argument ]]; then
+			path=$CONFIGS
+		else
+			path=$path/$argument
+		fi
+
+		project_file_contents "$project" "$path" "$DEPENDENCIES"
+	done
+
+	project_dependencies_collect_recursive "$project" "$@"
+}
+
+project_dependencies_collect_recursive() {
+	local project=$1
+	shift
+
+	local argument
+	local path
+
+	for argument in "" "$@"; do
+		if [[ -z $argument ]]; then
+			path=$CONFIGS
+		else
+			path=$path/$argument
+		fi
+	done
+
+	project_action_helper arguments "$project" "$@" | while IFS='' read -r argument; do
+		project_file_contents "$project" "$path/$argument" "$DEPENDENCIES"
+		project_dependencies_collect_recursive "$project" "$@" "$argument"
+	done
+}
+
+project_dependencies_encode_recursive() {
+	local project=$1
+	shift
+
+	local project_arguments=$(arguments_concat ' ' "$project" "$@")
+	local project_arguments_encoded=$(base64 -w0 <<< "$project_arguments")
+
+	local dependency
+
+	project_dependencies_collect "$project" "$@" | while IFS='' read -r dependency; do
+		local dependency_arguments=$(arguments_concat ' ' $dependency)
+		local dependency_arguments_encoded=$(base64 -w0 <<< "$dependency_arguments")
+
+		printf '%s\n' "$project_arguments_encoded $dependency_arguments_encoded"
+
+		project_dependencies_encode_recursive $dependency
+	done
+}
+
+project_dependencies_sort() {
+	local project=$1
+	shift
+
+	(
+		set -o pipefail
+
+		project_dependencies_encode_recursive "$project" "$@" | tsort | base64 -d -w0 | tac
+	)
 }
 
 project_dependencies_check() {
@@ -705,6 +782,26 @@ project_arguments_targets() {
 	fi
 }
 
+project_arguments_expand_recursive() {
+	local project=$1
+	shift
+
+	local -a arguments
+	readarray -t arguments < <(project_action_helper arguments "$project" "$@")
+
+	if [[ -z "${arguments[*]}" ]]; then
+		echo "$project" "$@"
+
+		return 0
+	fi
+
+	local argument
+
+	for argument in "${arguments[@]}"; do
+		project_arguments_expand_recursive "$project" "$@" "$argument"
+	done
+}
+
 project_usage_actions() {
 	local project="$1"
 	shift