package installer that auto-backports i3-wm

1 files changed, 105 insertions, 0 deletions

diff --git a/install-packages.bash b/install-packages.bash
new file mode 100644
index 0000000..3363353
--- /dev/null
+++ b/install-packages.bash
@@ -0,0 +1,105 @@
+#!/bin/bash
+set -e
+
+apt()
+{
+        (set -x; command apt "$@")
+}
+
+[ "$(id -u)" = 0 ] || exec sudo bash "$0" "$@"
+
+basics='etckeeper git par ssh tmux vim w3m'
+#xorg='xorg xterm i3'
+xorg='xorg xterm'
+media='libdbus-glib-1-2 mpv pulseaudio'
+apt install --no-upgrade $basics $xorg $media
+
+apt_backport()
+{
+    (
+        set -e
+        apt install --no-upgrade debhelper
+        SOURCES_DIR=$1
+        TARGET_URL=$2
+        TARGET_PKG=$3
+        case "$TARGET_PKG" in
+                '' | */*) exit 1 ;;
+        esac
+        mkdir -p "$SOURCES_DIR"
+        cd "$SOURCES_DIR"
+
+        if [ -e "$TARGET_PKG" ]
+        then
+                cd "$TARGET_PKG"
+                git pull --ff-only
+        else
+                rm -rf "$TARGET_PKG"~tmp
+                git clone --depth=1 "$TARGET_URL" "$TARGET_PKG"~tmp
+                mv -T "$TARGET_PKG"~tmp "$TARGET_PKG"
+                cd "$TARGET_PKG"
+        fi
+
+        arch=$(dpkg-architecture -q DEB_BUILD_ARCH)
+        version=$(dpkg-parsechangelog --show-field Version)
+        pkgs=$(dh_listpackages)
+        debs=
+        for pkg in $pkgs
+        do
+                debs="$debs ${pkg}_${version}_${arch}.deb"
+        done
+
+        set -x
+        pwd
+        for deb in $debs
+        do
+                [ -e ../"$deb" ] && continue || true
+                # We are missing a deb, therefore build.
+
+                if command -v mk-build-deps >/dev/null
+                then
+                        mk-build-deps "$TARGET_PKG" --install
+                else
+                        # We could 'apt install devscripts' but it pulls
+                        # in like 50MB of perl deps, possibly nullifying
+                        # the savings from removing unneeded build deps.
+
+                        # However, we cannot simply use 'apt build-dep'
+                        # because that would use the build-deps from the
+                        # version of the package in the repo, which may
+                        # differ from the source version.
+
+                        # Arguably we do want to try that though, since
+                        # it's a backport...
+
+                        if [ "$try_newer_build_deps" ]
+                        then
+                                build_deps=$(get_build_deps)
+                                apt install $build_deps
+                        else
+                                apt build-dep "$TARGET_PKG"
+                        fi
+                fi
+                fakeroot ./debian/rules binary
+                break
+        done
+
+        set --
+        for deb in $debs
+        do
+                set -- "$@" ../"$deb"
+        done
+        apt install "$@"
+    )
+}
+
+get_build_deps()
+{
+        # credit: Archemar @ https://unix.stackexchange.com/a/648927
+        build_deps=$(dpkg-checkbuilddeps 2>&1 |
+                sed -n -e 's/dpkg-checkbuilddeps:\serror:\sUnmet build dependencies: //gp' \
+                       -e 's/[\(][^)]*[\)] //g')
+}
+
+try_newer_build_deps=y
+apt_backport /usr/local/src https://salsa.debian.org/i3-team/i3-wm.git i3-wm
+