added releaser

ci/build-dep

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+set -e
+D="$(cd "$(dirname "${BASH_SOURCE[0]}")" >/dev/null 2>&1 && pwd)"
+
+# This script builds a binary dpkg for Debian based distros. It does not
+# currently run in CI, and is instead run manually and the resulting dpkg is
+# uploaded to GitHub via the web UI.
+#
+# Note that this requires 'cargo deb', which can be installed with
+# 'cargo install cargo-deb'.
+#
+# This should be run from the root of the ripgrep repo.
+
+if ! command -V cargo-deb > /dev/null 2>&1; then
+    echo "cargo-deb command missing" >&2
+    exit 1
+fi
+
+# 'cargo deb' does not seem to provide a way to specify an asset that is
+# created at build time, such as ripgrep's man page. To work around this,
+# we force a debug build, copy out the man page (and shell completions)
+# produced from that build, put it into a predictable location and then build
+# the deb, which knows where to look.
+cargo build
+
+DEPLOY_DIR=deployment/deb
+OUT_DIR="$("$D"/cargo-out-dir target/debug/)"
+mkdir -p "$DEPLOY_DIR"
+
+# Since we're distributing the dpkg, we don't know whether the user will have
+# PCRE2 installed, so just do a static build.
+PCRE2_SYS_STATIC=1 cargo deb --target x86_64-unknown-linux-musl

ci/cargo-out-dir

@@ -0,0 +1,14 @@
+#!/bin/bash
+
+if [ $# != 1 ]; then
+  echo "Usage: $(basename "$0") <target-dir>" >&2
+  exit 2
+fi
+
+# This works by finding the most recent stamp file, which is produced by
+# every ripgrep build.
+target_dir="$1"
+find "$target_dir" -name kignore-stamp -print0 \
+  | xargs -0 ls -t \
+  | head -n1 \
+  | xargs dirname

ci/ubuntu-install-packages

@@ -0,0 +1,10 @@
+#!/bin/sh
+
+if ! command -V sudo; then
+  apt-get update
+  apt-get install -y --no-install-recommends sudo
+fi
+sudo apt-get update
+sudo apt-get install -y --no-install-recommends \
+  zsh xz-utils liblz4-tool musl-tools \
+  brotli zstd