Re-sync with internal repository

build/buck2/README.md

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+# Easy buck2 builds for Facebook projects
+
+This directory contains buck2 targets designed to simplify buck2 builds of
+Meta open source projects.
+
+The most notable target is `//build/buck2/install_deps`, which will attempt to
+discover and install necessary third party packages from apt / dnf / etc.
+See the "repos" directory for the currently supported platforms.
+
+## Deployment
+
+This directory is copied literally into a number of different Facebook open
+source repositories.  Any change made to code in this directory will be
+automatically be replicated by our open source tooling into all GitHub hosted
+repositories that use `buck2`.  Typically this directory is copied
+into the open source repositories as `build/buck2/`.

build/buck2/install_deps/BUCK

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+# Copyright (c) Meta Platforms, Inc. and affiliates.
+#
+# This source code is licensed under both the MIT license found in the
+# LICENSE-MIT file in the root directory of this source tree and the Apache
+# License, Version 2.0 found in the LICENSE-APACHE file in the root directory
+# of this source tree.
+load("@fbcode_macros//build_defs:native_rules.bzl", "buck_sh_binary")
+
+oncall("open_source")
+
+buck_sh_binary(
+    name = "install_deps",
+    main = "install_deps.sh",
+    resources = glob(["repos/*"]),
+)

build/buck2/install_deps/install_deps.sh

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+#!/bin/sh
+# (c) Meta Platforms, Inc. and affiliates. Confidential and proprietary.
+
+if [ -z "$INSTALL_COMMAND" ]; then
+  if [ -f /etc/os-release ]; then
+    . /etc/os-release;
+  fi
+
+  if command -v brew >/dev/null; then
+    ID="homebrew";
+  fi
+
+  if [ -f "$BUCK_DEFAULT_RUNTIME_RESOURCES/repos/$ID" ]; then
+    # shellcheck disable=SC1090
+    . "$BUCK_DEFAULT_RUNTIME_RESOURCES/repos/$ID";
+  else
+    echo "Unable to determine platform id / install commands";
+    return 1;
+  fi
+fi
+
+if [ -z "${BUCK2_COMMAND}" ]; then
+  if command -v buck2 >/dev/null; then
+    BUCK2_COMMAND="buck2"
+  elif command -v dotslash >/dev/null && [ -f ./buck2 ]; then
+    BUCK2_COMMAND="dotslash ./buck2"
+  else
+    echo "Unable to determine buck2 command";
+    return 1;
+  fi
+fi
+
+PKG_FILE=$(mktemp /tmp/buck2-install-pkgs.XXXXXX)
+
+eval "$BUCK2_COMMAND \\
+    cquery \"attrregexfilter(labels, 'third-party:$ID:', deps(//...))\" \\
+    --json --output-attribute=labels 2>/dev/null \\
+  | grep -o \"third-party:$ID:[^\\\"]*\" \\
+  | sort \\
+  | uniq \\
+  | sed \"s/third-party:$ID://\" \\
+  > $PKG_FILE"
+
+echo "About to install the project dependencies with the following command:"
+echo
+eval "cat $PKG_FILE | xargs echo $INSTALL_COMMAND"
+echo
+echo "Press \"y\" to continue"
+read -r REPLY
+echo
+
+if expr "X$REPLY" : '^X[Yy]$' >/dev/null; then
+  eval "cat $PKG_FILE | xargs -r $INSTALL_COMMAND"
+else
+  echo "Not installing dependencies"
+fi
+
+rm "$PKG_FILE"

build/buck2/install_deps/repos/fedora

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+INSTALL_COMMAND="sudo -E dnf install -y"

build/buck2/install_deps/repos/homebrew

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+INSTALL_COMMAND="brew install"

build/buck2/install_deps/repos/ubuntu

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+INSTALL_COMMAND="sudo -E apt-get install -y"