feat: Enable 'local' installation mode. Closes #12

'local' installation mode requires the presense of a 'bpm.toml' file. This is
to determine the root of the project (so we know where to place the 'bpm_packages'
folder)

Author: hyperupcall

pkg/completions/bpm.bash

@@ -1,5 +1,5 @@
 _bpm() {
-	local -ra listPreSubcommandOptions=(--help --version)
+	local -ra listPreSubcommandOptions=(--help --version --global)
 	local -ra listSubcommands=(add echo init link list package-path remove upgrade)
 
 	local -r currentWord="${COMP_WORDS[COMP_CWORD]}"

pkg/lib/cmd/bpm.sh

@@ -15,6 +15,8 @@ main() {
 		source "$f"
 	done
 
+	local is_global='no'
+
 	for arg; do
 		case "$arg" in
 		--help)
@@ -28,14 +30,37 @@ main() {
 			exit
 			;;
 		--global)
-			declare -rg BPM_MODE_GLOBAL=
+			is_global='yes'
+			shift
 			;;
 		*)
 			break
 			;;
 		esac
 	done
 
+	if [ "$is_global" = 'no' ]; then
+		if ! project_root_directory="$(
+			while [[ ! -f "bpm.toml" && "$PWD" != / ]]; do
+				cd ..
+			done
+
+			if [[ $PWD == / ]]; then
+				die "No 'bpm.toml' file found. Please create one to install local packages or pass the '--global' option"
+			fi
+
+			printf "%s" "$PWD"
+		)"; then
+			exit 1
+		fi
+
+		BPM_PREFIX="$project_root_directory/bpm_packages"
+		BPM_PACKAGES_PATH="$BPM_PREFIX/packages"
+		BPM_INSTALL_BIN="$BPM_PREFIX/bin"
+		BPM_INSTALL_MAN="$BPM_PREFIX/man"
+		BPM_INSTALL_COMPLETIONS="$BPM_PREFIX/completions"
+	fi
+
 	case "$1" in
 	add)
 		shift

pkg/lib/commands/do-plumbing-remove-deps.sh

@@ -20,15 +20,13 @@ do-plumbing-remove-deps() {
 		fi
 	fi
 
-	# TODO: bug: this removes dependencies specified with incorrect URLs
 	log.info "Removing dependencies for '$package'"
 	for dep in "${deps[@]}"; do
 		util.construct_clone_url "$repoSpec" "$with_ssh"
-		local uri="$REPLY1"
 		local site="$REPY2"
 		local package="$REPLY3"
 		local ref="$REPLY4"
 
-		rm -rf "${BPM_PACKAGES_PATH:?}/$package"
+		rm -rf "${BPM_PACKAGES_PATH:?}/$site/$package"
 	done
 }

tests/do-plumbing-remove-deps.bats

@@ -0,0 +1,3 @@
+#!/usr/bin/env bats
+
+# TODO