chore!: deprecate homebrew, remove ruby install

Homebrew is deprecated and will be removed at the end of March 2023.

Homebrew reinstalls the bundled ruby if it's unavailable, so this helps
us save space in the short term until Homebrew is removed.

images/base/Dockerfile.centos

@@ -52,4 +52,13 @@ USER coder
 
 # install Homebrew, must be as a non-root user
 RUN HOMEBREW_INSTALL_FROM_API=1 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
-ENV PATH /home/linuxbrew/.linuxbrew/bin:${PATH}
+
+USER ROOT
+
+# install our deprecation message wrapper for homebrew
+COPY --chown=root:root --chmod=755 homebrew-wrapper.sh /usr/local/bin/brew
+# remove the bundled ruby from homebrew to save space, homebrew reinstalls
+# anyways
+RUN rm -rf /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/portable-ruby
+
+USER CODER

images/base/Dockerfile.ubuntu

@@ -60,4 +60,13 @@ USER coder
 
 # install Homebrew, must be as a non-root user
 RUN HOMEBREW_INSTALL_FROM_API=1 /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
-ENV PATH /home/linuxbrew/.linuxbrew/bin:${PATH}
+
+USER ROOT
+
+# install our deprecation message wrapper for homebrew
+COPY --chown=root:root --chmod=755 homebrew-wrapper.sh /usr/local/bin/brew
+# remove the bundled ruby from homebrew to save space, homebrew reinstalls
+# anyways
+RUN rm -rf /home/linuxbrew/.linuxbrew/Homebrew/Library/Homebrew/vendor/portable-ruby
+
+USER CODER

images/base/homebrew-wrapper.sh

@@ -0,0 +1,18 @@
+#!/bin/sh
+
+brew_bin="/home/linuxbrew/.linuxbrew/bin/brew"
+prefix="WARNING: "
+if [ -t 1 ]; then
+  # If stdout is a terminal, use color.
+  prefix="\033[1;33m${prefix}\033[0m"
+fi
+
+warning() {
+    echo "${prefix}Homebrew in Coder images is deprecated and will be removed at the end of March 2023." 1>&2
+}
+
+warning
+echo
+"$brew_bin" "$@"
+echo
+warning