bootstrap: Switch package list to tsv

Package list is now a single tab separated list. That should make
several automations in the future much simpler.

The table is built as follows:
`Name   Description Source  Target`

with one line per package. Source denotes official repositories or AUR,
and target is kept for future potential of creating different
deployments per target automatically (e.g. different package list for
desktop and server, and so on).

There is an updater script `bootstrap/update_package_list.sh` which will
automatically populate the table, removing uninstalled packages, adding
new ones and (making its best attempt to be) keeping the selected
targets as they are.

The git commit hook comparing installed and committed packages has also
been rewritten to use the new table and be a little simpler overall.

Fixes #2.

bootstrap/update_package_list.sh

@@ -0,0 +1,61 @@
+#!/usr/bin/env bash
+BOOTSTRAP_DIR=~/.dotfiles/bootstrap
+OUTPUT=${BOOTSTRAP_DIR}/packages.tsv
+
+pkg_all=$(pacman -Qqett | grep -v "$(pacman -Qqg base-devel)")
+
+pkg_repo=$(pacman -Qqn)
+pkg_aur=$(pacman -Qqm)
+
+# tsv file:
+# packagename, description, source, target
+# toot  a toot manager  A   D
+
+if [ -f "${OUTPUT}_TEMP" ]; then
+    rm "${OUTPUT}_TEMP"
+fi
+touch "${OUTPUT}_TEMP"
+
+# create new package list
+for pkg in $pkg_all; do
+
+    source=""
+    if $(echo "$pkg_repo" | grep -F -q -x "$pkg"); then
+        source="R"
+    elif $(echo "$pkg_aur" | grep -F -q -x "$pkg"); then
+        source="A"
+    else
+        echo "ERROR: The package $pkg could not be found in repositories or AUR."
+        exit 1
+    fi
+
+    desc=$(pacman -Qs "$pkg" | grep -A1 --color "local/$pkg\s" | tail -n1)
+    #remove leading whitespace
+    desc="${desc#"${desc%%[![:space:]]*}"}"
+
+    target=""
+    if [ -f "$OUTPUT" ]; then
+        found_line=$(grep -e "^$pkg" "$OUTPUT")
+    fi
+    if [ -n "$found_line" ]; then
+        target=$(echo "$found_line" | cut -f4)
+        printf "Updating pkg: %s:%s from: %s, for: %s\n" "$pkg" "$desc" "$source" "$target"
+    else
+        printf "Adding pkg: %s:%s from: %s, for: %s\n" "$pkg" "$desc" "$source" "$target"
+    fi
+
+    printf "%s\t%s\t%s\t%s\n" "$pkg" "$desc" "$source" "$target" >>"${OUTPUT}_TEMP"
+done
+
+# notify on any removed packages
+if [ -f "$OUTPUT" ]; then
+    while read -r line; do
+        if ! echo "$line" | cut -f1 | xargs -I _ grep -F -q -x _ <(echo "$pkg_all"); then
+            printf "REMOVED: %s" "$line"
+        fi
+    done <<<$(tail +2 "$OUTPUT")
+fi
+
+# actually write to file
+cat <(printf "Name\tDescription\tSource\tTarget\n") "${OUTPUT}_TEMP" >"$OUTPUT"
+rm "${OUTPUT}_TEMP"