replace installation script with a Makefile

Both Bash and GNU Make are not really fit for purpose here, but it turns out
Make sucks marginally less. It would be preferable to use something like Python
(or even Chef/Puppet/Ansible if we were really serious about ops). However, it
seems it is 2018 and I still need access to these tools in BusyBox-like
environments with almost nothing modern available.

Author: Smattr

Makefile

@@ -1,12 +1,107 @@
-# TODO: subsume internal/install.sh
+ifdef VERBOSE
+  V :=
+else
+  V := @
+endif
 
 CC ?= cc
-CFLAGS ?= -std=c11 -W -Wall -Wextra -Wshadow -Wwrite-strings
+CFLAGS ?= -std=c11 -O3 -W -Wall -Wextra -Wshadow -Wwrite-strings
+
+CXX ?= c++
+CFLAGS ?= -std=c++11 -O3 -W -Wall -Wextra -Wshadow -Wwrite-strings -Wmissing-declarations
 
 # Serenity now
 SHELL := $(shell which bash)
 
-default: ${HOME}/bin/cub
+default: \
+  ${HOME}/.ssh/config_mattutils \
+  ${HOME}/.agignore \
+  ${HOME}/.dircolors \
+  ${HOME}/.emacs \
+  ${HOME}/.fonts.conf \
+  ${HOME}/.gdbinit \
+  ${HOME}/.gitconfig \
+  ${HOME}/.hgrc \
+  ${HOME}/.mplayer \
+  ${HOME}/.screenrc \
+  ${HOME}/.tmux.conf \
+  ${HOME}/.tmux-new-pane_current_path.conf \
+  ${HOME}/.tmux-new-vi-copy.conf \
+  ${HOME}/.tmux-old-pane_current_path.conf \
+  ${HOME}/.tmux-old-vi-copy.conf \
+  ${HOME}/.tmux-tpm.conf \
+  ${HOME}/.vimrc \
+  ${HOME}/.vim \
+  ${HOME}/.wgetrc \
+  ${HOME}/.Xdefaults \
+  ${HOME}/.zsh \
+  ${HOME}/.zshrc \
+  ${HOME}/bin/addcert.sh \
+  ${HOME}/bin/after \
+  ${HOME}/bin/ag \
+  ${HOME}/bin/bashd.sh \
+  ${HOME}/bin/check_tmux_version.sh \
+  ${HOME}/bin/cmake \
+  ${HOME}/bin/compresspdf.sh \
+  ${HOME}/bin/cub \
+  ${HOME}/bin/dif \
+  ${HOME}/bin/fifi.sh \
+  ${HOME}/bin/find-broken.sh \
+  ${HOME}/bin/fwdmail.py \
+  ${HOME}/bin/generate-passwd \
+  ${HOME}/bin/g \
+  ${HOME}/bin/ifind \
+  ${HOME}/bin/kage \
+  ${HOME}/bin/meta_c \
+  ${HOME}/bin/meta_h \
+  ${HOME}/bin/meta_l \
+  ${HOME}/bin/meta_u \
+  ${HOME}/bin/meta_z \
+  ${HOME}/bin/notate.py \
+  ${HOME}/bin/pdfcrop.sh \
+  ${HOME}/bin/prefix \
+  ${HOME}/bin/pyman \
+  ${HOME}/bin/search \
+  ${HOME}/bin/ssh-proxy \
+  ${HOME}/bin/t \
+  ${HOME}/bin/term \
+  ${HOME}/bin/timestamp \
+  ${HOME}/bin/ubiquity \
+  ${HOME}/bin/validate.py \
+  ${HOME}/bin/wim \
+
+
+${HOME}/.ssh/config_mattutils: config/.ssh/config Makefile
+	@printf ' [LN] %s\n' "$(notdir $@)"
+	${V}if [ ! -e "$@" ]; then ln -s $$(pwd)/$< $@; elif [ ! -L "$@" ]; then printf 'Warning: Skipping %s that already exists\n' "$@" >&2; fi
+
 
 ${HOME}/bin/cub: cub.c Makefile
-	${CC} ${CFLAGS} -o $@ $<
+	@printf ' [CC] %s\n' "$(notdir $@)"
+	${V}mkdir -p "$(dir $@)"
+	${V}${CC} ${CFLAGS} -o $@ $<
+
+${HOME}/bin/dif: dif.cpp
+	@printf ' [CXX] %s\n' "$(notdir $@)"
+	${V}mkdir -p "$(dir $@)"
+	${V}${CXX} ${CXXFLAGS} -o $@ $<
+
+${HOME}/.%: config/.% Makefile
+	@printf ' [LN] %s\n' "$(notdir $@)"
+	${V}if [ ! -e "$@" ]; then ln -s $$(pwd)/$< $@; elif [ ! -L "$@" ]; then printf 'Warning: Skipping %s that already exists\n' "$@" >&2; fi
+
+${HOME}/bin/%: % Makefile
+	@printf ' [LN] %s\n' "$(notdir $@)"
+	${V}mkdir -p "$(dir $@)"
+	${V}if [ ! -e "$@" ]; then ln -s $$(pwd)/$< $@; elif [ ! -L "$@" ]; then printf 'Warning: Skipping %s that already exists\n' "$@" >&2; fi
+
+${HOME}/bin/rerebase: rerebase.c Makefile
+	@printf ' [CC] %s\n' "$(notdir $@)"
+	${V}mkdir -p "$(dir $@)"
+	${V}${CC} ${CFLAGS} -o $@ $<
+
+${HOME}/.tmux/plugins/tpm: Makefile
+	@printf 'Warning: Tmux Plugin Manager not found (~/.tmux/plugins/tpm)\n' >&2
+
+# Disable built-in rules.
+.SUFFIXES: