ci: switch build to GitHub Actions

ci/cargo-out-dir

@@ -0,0 +1,19 @@
+#!/bin/bash
+
+# Finds Cargo's `OUT_DIR` directory from the most recent build.
+#
+# This requires one parameter corresponding to the target directory
+# to search for the build output.
+
+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 ripgrep-stamp -print0 \
+  | xargs -0 ls -t \
+  | head -n1 \
+  | xargs dirname

ci/docker/README.md

@@ -0,0 +1,24 @@
+These are Docker images used for cross compilation in CI builds (or locally)
+via the [Cross](https://github.com/rust-embedded/cross) tool.
+
+The Cross tool actually provides its own Docker images, and all Docker images
+in this directory are derived from one of them. We provide our own in order
+to customize the environment. For example, we need to install some things like
+`asciidoc` in order to generate man pages. We also install compression tools
+like `xz` so that tests for the `-z/--search-zip` flag are run.
+
+If you make a change to a Docker image, then you can re-build it. `cd` into the
+directory containing the `Dockerfile` and run:
+
+    $ cd x86_64-unknown-linux-musl
+    $ ./build
+
+At this point, subsequent uses of `cross` will now use your built image since
+Docker prefers local images over remote images. In order to make these changes
+stick, they need to be pushed to Docker Hub:
+
+    $ docker push burntsushi/cross:x86_64-unknown-linux-musl
+
+Of course, only I (BurntSushi) can push to that location. To make `cross` use
+a different location, then edit `Cross.toml` in the root of this repo to use
+a different image name for the desired target.

ci/docker/arm-unknown-linux-gnueabihf/Dockerfile

@@ -0,0 +1,4 @@
+FROM rustembedded/cross:arm-unknown-linux-gnueabihf
+
+COPY stage/ubuntu-install-packages /
+RUN /ubuntu-install-packages

ci/docker/arm-unknown-linux-gnueabihf/build

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+mkdir -p stage
+cp ../../ubuntu-install-packages ./stage/
+docker build -t burntsushi/cross:arm-unknown-linux-gnueabihf .

ci/docker/i686-unknown-linux-gnu/Dockerfile

@@ -0,0 +1,4 @@
+FROM rustembedded/cross:i686-unknown-linux-gnu
+
+COPY stage/ubuntu-install-packages /
+RUN /ubuntu-install-packages

ci/docker/i686-unknown-linux-gnu/build

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+mkdir -p stage
+cp ../../ubuntu-install-packages ./stage/
+docker build -t burntsushi/cross:i686-unknown-linux-gnu .

ci/docker/mips64-unknown-linux-gnuabi64/Dockerfile

@@ -0,0 +1,4 @@
+FROM rustembedded/cross:mips64-unknown-linux-gnuabi64
+
+COPY stage/ubuntu-install-packages /
+RUN /ubuntu-install-packages

ci/docker/mips64-unknown-linux-gnuabi64/build

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+mkdir -p stage
+cp ../../ubuntu-install-packages ./stage/
+docker build -t burntsushi/cross:mips64-unknown-linux-gnuabi64 .

ci/docker/x86_64-unknown-linux-musl/Dockerfile

@@ -1,5 +1,4 @@
 FROM rustembedded/cross:x86_64-unknown-linux-musl
 
-RUN apt-get update \
- && apt-get install -y --no-install-recommends \
-      libxslt1-dev asciidoc docbook-xsl xsltproc libxml2-utils
+COPY stage/ubuntu-install-packages /
+RUN /ubuntu-install-packages

ci/docker/x86_64-unknown-linux-musl/build

@@ -0,0 +1,5 @@
+#!/bin/sh
+
+mkdir -p stage
+cp ../../ubuntu-install-packages ./stage/
+docker build -t burntsushi/cross:x86_64-unknown-linux-musl .

ci/macos-install-packages

@@ -0,0 +1,3 @@
+#!/bin/sh
+
+brew install asciidoc docbook-xsl

ci/test_complete.sh

@@ -18,7 +18,7 @@ get_comp_args() {
 
 main() {
     local diff
-    local  rg="${0:a:h}/../target/${TARGET:-}/release/rg"
+    local  rg="${0:a:h}/../${TARGET_DIR:-target}/release/rg"
     local _rg="${0:a:h}/../complete/_rg"
     local -a help_args comp_args
 

ci/ubuntu-install-packages

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+sudo apt-get update
+sudo apt-get install -y --no-install-recommends \
+  libxslt1-dev asciidoc docbook-xsl xsltproc libxml2-utils \
+  zsh xz-utils liblz4-tool musl-tools