fix: Completions wofk with init fish

Instead of trying to use `fish_complete_path`, just source all the
files. This also solves the problem of a file not being the same name
as the file to be completed. This allows ammending completions for new
git subcommands

Author: hyperupcall

docs/installation.md

@@ -47,8 +47,13 @@ eval "$(bpm init bash)" # replace 'bash' with your shell
 For `fish`
 
 ```fish
-set -gx PATH "${XDG_DATA_HOME:-$HOME/.local/share}/bpm/source/pkg/bin" $PATH
-source (bpm init fish | psub)
+if test -n "$XDG_DATA_HOME"
+  set -gx PATH $XDG_DATA_HOME/bpm/source/pkg/bin $PATH
+else
+  set -gx PATH $HOME/.local/share/bpm/source/pkg/bin $PATH
+end
+
+bpm init fish | source
 ```
 
 And now you're done! Move on to [Getting Started](./getting-started.md) to learn the basics

pkg/lib/commands/do-init.sh

@@ -57,7 +57,7 @@ do-init() {
 		set -gx BPM_PACKAGES_PATH $BPM_PACKAGES_PATH
 
 		# bpm completion
-		set -g fish_complete_path \$BPM_ROOT/source/completions \$fish_complete_path
+		source \$BPM_ROOT/source/completions/bpm.fish
 
 		# bpm include function
 		if [ -f "$BPM_ROOT/source/pkg/share/include.fish" ]
@@ -70,7 +70,12 @@ do-init() {
 		end
 
 		# bpm packages completions
-		set -g fish_complete_path \$BPM_PREFIX/completions/fish \$fish_complete_path
+		# set -gx fish_complete_path \$fish_complete_path
+		if [ -d \$BPM_PREFIX/completions/fish ]
+		  for f in \$BPM_PREFIX/completions/fish/?*.fish
+		    source \$f
+		  end
+		end
 		EOF
 		;;
 	bash)