Add debian packaging

debian/changelog

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+cosmic-edit (0.1.0) jammy; urgency=medium
+
+  * Initial release.
+
+ -- Jeremy Soller <jeremy@system76.com>  Tue, 03 Oct 2023 07:37:28 -0600

debian/control

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+Source: cosmic-edit
+Section: admin
+Priority: optional
+Maintainer: Jeremy Soller <jeremy@system76.com>
+Build-Depends:
+    debhelper-compat (=13),
+    just (>= 1.13.0),
+    libclang-dev,
+    libwayland-dev,
+    libxkbcommon-dev,
+    pkg-config,
+    rust-all,
+Standards-Version: 4.6.2
+Homepage: https://github.com/pop-os/cosmic-edit
+
+Package: cosmic-edit
+Architecture: amd64 arm64
+Depends: ${misc:Depends}, ${shlibs:Depends}
+Description: Cosmic Text Editor

debian/copyright

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+Format: https://www.debian.org/doc/packaging-manuals/copyright-format/1.0/
+Upstream-Name: cosmic-edit
+Upstream-Contact: Jeremy Soller <jeremy@system76.com>
+Source: https://github.com/pop-os/cosmic-edit
+Files: *
+Copyright: System76 <info@system76.com>
+License: GPL-3.0

debian/rules

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+#!/usr/bin/make -f
+
+export DESTDIR = debian/cosmic-edit
+export VENDOR ?= 1
+
+%:
+	dh $@
+
+override_dh_auto_clean:
+	if ! ischroot && test "${VENDOR}" = "1"; then \
+		mkdir -p .cargo; \
+		cargo vendor | head -n -1 > .cargo/config; \
+		echo 'directory = "vendor"' >> .cargo/config; \
+		tar pcf vendor.tar vendor; \
+		rm -rf vendor; \
+	fi
+
+override_dh_auto_build:
+	just build-vendored
+
+override_dh_auto_install:
+	just rootdir=$(DESTDIR) install

debian/source/format

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+3.0 (native)

debian/source/options

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+tar-ignore=.github
+tar-ignore=.vscode
+tar-ignore=vendor
+tar-ignore=target