feat(build): Debian packaging support (#124)

* build: Add Makefile for building on Linux with make

* packaging: Add debian packaging to build on Debian platforms

* Define `env CLEAN=0` to prevent from rebuilding sources
* Define `env VENDOR=0` to prevent vendoring of sources

To build in a schroot for bionic:

```
sbuild -d bionic --extra-repository='deb [trusted=yes] http://ppa.launchpad.net/mmstick76/rust/ubuntu bionic main'
```

Replace bionic with whichever Ubuntu release you are building for

6 files changed, 108 insertions, 1 deletions

diff --git a/.gitignore b/.gitignore
index 53eaa21..28fb351 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,14 @@
-/target
+.cargo/
+target/
+vendor/
+vendor.tar
 **/*.rs.bk
+
+# Debian support
+
+debian/*
+!debian/changelog
+!debian/control
+!debian/copyright
+!debian/rules
+!debian/source
diff --git a/Makefile b/Makefile
new file mode 100644
index 0000000..6da0877
--- /dev/null
+++ b/Makefile
@@ -0,0 +1,50 @@
+prefix ?= /usr/local
+
+TARGET=debug
+DEBUG ?= 0
+ifeq ($(DEBUG),0)
+	TARGET = release
+	ARGS = --release
+endif
+
+VENDOR ?= 0
+ifeq ($(VENDOR),1)
+	ARGS += --frozen
+endif
+
+APP=bandwhich
+BIN=target/$(TARGET)/$(APP)
+BIN_DST=$(DESTDIR)$(prefix)/bin/$(APP)
+DOC_DST=$(DESTDIR)$(prefix)/share/man/man1/bandwhich.1
+LIC_DST=$(DESTDIR)$(prefix)/share/licenses/$(APP)
+SRC = Makefile Cargo.lock Cargo.toml $(shell find src -type f -wholename 'src/*.rs')
+
+.PHONY: all clean distclean install uninstall vendor
+
+all: $(BIN)
+
+clean:
+	cargo clean
+
+distclean:
+	rm -rf .cargo vendor vendor.tar
+
+$(BIN): $(SRC)
+ifeq ($(VENDOR),1)
+	tar pxf vendor.tar
+endif
+	cargo build $(ARGS)
+
+install:
+	install -Dm755 $(BIN) $(BIN_DST)
+	install -Dm644 docs/bandwhich.1 $(DOC_DST)
+	install -Dm644 LICENSE.md $(LIC_DST)/LICENSE
+
+uninstall:
+	rm -rf $(BIN_DST) $(DOC_DST) $(LIC_DST)
+
+vendor:
+	mkdir -p .cargo
+	cargo vendor | head -n -1 > .cargo/config
+	echo 'directory = "vendor"' >> .cargo/config
+	tar pcf vendor.tar vendor
diff --git a/debian/changelog b/debian/changelog
new file mode 100644
index 0000000..69b8713
--- /dev/null
+++ b/debian/changelog
@@ -0,0 +1,5 @@
+bandwhich (0.9.0) bionic; urgency=medium
+
+  * Initial debian packaging
+
+ -- Michael Aaron Murphy <michael@system76.com>  Thu, 16 Jan 2020 8:26:58 -0700
diff --git a/debian/control b/debian/control
new file mode 100644
index 0000000..7c04b07
--- /dev/null
+++ b/debian/control
@@ -0,0 +1,17 @@
+Source: bandwhich
+Section: utils
+Priority: optional
+Maintainer: Michael Aaron Murphy <mmstick@pm.me>
+Build-Depends:
+  cargo (>=0.40),
+  clang,
+  debhelper-compat (=9),
+  rustc (>=1.39)
+Standards-Version: 4.4.1
+Homepage: https://github.com/imsnif/bandwhich
+
+Package: bandwhich
+Architecture: any
+Depends: ${misc:Depends}, ${shlib:Depends}
+Description: Terminal bandwidth utilization tool
+  Terminal bandwidth utilization tool
diff --git a/debian/rules b/debian/rules
new file mode 100755
index 0000000..d16f6b9
--- /dev/null
+++ b/debian/rules
@@ -0,0 +1,22 @@
+#!/usr/bin/make -f
+
+export VENDOR ?= 1
+export prefix = /usr
+CLEAN ?= 1
+
+%:
+	dh $@
+
+override_dh_auto_clean:
+ifeq ($(CLEAN),1)
+	make clean;
+endif
+ifeq ($(VENDOR),1)
+	if ! ischroot; then \
+		make vendor; \
+		rm -rf vendor; \
+	fi
+endif
+
+override_dh_auto_build:
+	env CARGO_HOME="$$(pwd)/target/cargo" dh_auto_build
diff --git a/debian/source/format b/debian/source/format
new file mode 100644
index 0000000..89ae9db
--- /dev/null
+++ b/debian/source/format
@@ -0,0 +1 @@
+3.0 (native)