Add debug tracing

I expected the fish script install steps that failed to cause the
install step as a whole to fail, but that didn't happen.  Why!?

taskwarrior.cygport

@@ -33,31 +33,45 @@ src_test () {
 	./problems
 }
 
+vverbose () {
+	local msg rc
+	printf -v msg '%q ' "$@"
+	inform "${msg::-1}"
+	rc=0
+	"${@}" || rc="$?"
+	printf -v msg '%s returns %d\n' "${cmd[0]}" "$rc"
+	inform "$msg"
+	return "$rc"
+}
+
 src_install () {
-	cd "$B"
-	cyginstall
+	inform "${BASHOPTS@Q} / ${BASH_LINENO[@]@Q} / ${BASH_SOURCE[@]@Q} / ${FUNCNAME[@]@Q} / ${LINENO} / ${PIPESTATUS[@]@Q}"
+	vverbose cd "$B"
+	vverbose cyginstall
 
 	# The taskwarrior installer puts actually useful completion and Vim
 	# scripts in the documentation folder.  Put those somewhere more
 	# useful.
-	cd "$D"
+	vverbose cd "$D"
 
+	vverbose pkg-config --variable=completionsdir bash-completion
 	bash_completions_dir="$(pkg-config --variable=completionsdir bash-completion)"
 	bash_completions_dir="${bash_completions_dir#/}"
-	mkdir -p "$bash_completions_dir"
-	mv usr/share/doc/taskwarrior/scripts/bash/task.sh "$bash_completions_dir"/task
+	vverbose mkdir -p "$bash_completions_dir"
+	vverbose mv usr/share/doc/taskwarrior/scripts/bash/task.sh "$bash_completions_dir"/task
 
+	vverbose pkg-config --variable=completionsdir fish
 	fish_completions_dir="$(pkg-config --variable=completionsdir fish)"
 	fish_completions_dir="${fish_completions_dir#/}"
-	mkdir -p "$fish_completions_dir"
-	mv usr/share/doc/scripts/fish/task.fish "$fish_completions_dir"
+	vverbose mkdir -p "$fish_completions_dir"
+	vverbose mv usr/share/doc/scripts/fish/task.fish "$fish_completions_dir"
 
 	# Seems like there should be a better option than hard-coding this
 	# path, but I couldn't trivially find one.
 	vim_config_dir=usr/share/vim/vimfiles
-	mkdir -p "$vim_config_dir"
-	mv usr/share/doc/taskwarrior/scripts/vim/{ftdetect,syntax} "$vim_config_dir"
-	mv usr/share/doc/taskwarrior/scripts/vim/README usr/share/doc/taskwarrior/vim.README
+	vverbose mkdir -p "$vim_config_dir"
+	vverbose mv usr/share/doc/taskwarrior/scripts/vim/{ftdetect,syntax} "$vim_config_dir"
+	vverbose mv usr/share/doc/taskwarrior/scripts/vim/README usr/share/doc/taskwarrior/vim.README
 }
 
 # vim: set noexpandtab tabstop=8 listchars=tab\:\ \ ,trail\:-,lead\:-