feature: make install easier for unixers with asdf

.tool-versions

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+python 3.10.10

setup-asdf.bash

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+#!/usr/bin/env bash
+
+#
+# Setup ASDF and Plugins
+#
+# @example
+#
+#    ASDF_PLUGIN_URL_nodejs=https://someurl \
+#      ./setup.bash
+#
+
+set -e
+
+[ $(command -v git) ] || {
+  echo "==> 📛📦 Missing git"
+  exit 1
+}
+[ $(command -v curl) ] || {
+  echo "==> 📛📦 Missing curl"
+  exit 1
+}
+
+# Local vars
+ASDF_VERSION=${ASDF_VERSION:-v0.9.0}
+ASDF_HOME=$HOME/.asdf
+ASDF_BIN=$ASDF_HOME/asdf.sh
+
+##
+# Helper to idempotently add strings to target files
+#
+append_uniquely() {
+  # this is a more correct way to test for presence of strings in files
+  # and then act on the outcome.
+  cat "${1}" | grep -zqv "${2}" && {
+    echo "==> ✍ Writing \"$2\" into \"$1\" "
+    echo "${2}" >>$1
+  } || {
+    echo "==> ✅ '${2}' already exists in ${1}"
+  }
+}
+
+get_processor() {
+  [[ $(sysctl -e -n machdep.cpu.brand_string) =~ "Apple" ]] && {
+    echo 'M1'
+  } || uname -m
+}
+get_platform() {
+  uname -s
+}
+
+case "${SHELL}" in
+/bin/bash)
+  SHELL_PROFILE=~/.bashrc
+  SHELL_NAME="bash"
+  ;;
+/bin/zsh)
+  SHELL_PROFILE=~/.zshrc
+  SHELL_NAME="zsh"
+  ;;
+esac
+
+echo "==> 💁 [ASDF] install with plugins"
+
+if [ ! -f "$ASDF_BIN" ]; then
+  echo "===> ⤵️ ASDF not detected ... installing"
+  git clone https://github.com/asdf-vm/asdf.git "$ASDF_HOME" --branch $ASDF_VERSION
+  [ ! command -v asdf ] &>/dev/null && {
+    echo "====> ⚕️ adding to shell profile"
+    append_uniquely "$SHELL_PROFILE" ". $ASDF_HOME/asdf.sh"
+    append_uniquely "$SHELL_PROFILE" ". $ASDF_HOME/completions/asdf.bash"
+  }
+fi
+
+source "$ASDF_BIN"
+
+for plugin in $(cut -d' ' -f1 ./.tool-versions); do
+  echo "==> 💁 [ASDF] Ensure ${plugin} plugin"
+  if [ -d "$ASDF_HOME/plugins/${plugin}" ]; then
+    echo "===> 📦 attempting upgrade"
+    asdf plugin-update "${plugin}"
+  else
+    echo "===> ⤵️ installing"
+    plugin_url_var=ASDF_PLUGIN_URL_${plugin//-/_}
+    plugin_url="${!plugin_url_var}"
+
+    if [ ${!plugin_url_var+x} ]; then
+      echo "====> 💁 [${plugin}] installed from ${plugin_url}"
+    fi
+
+    asdf plugin-add "${plugin}" "${plugin_url}"
+  fi
+done
+
+PROCESSOR=$(get_processor)
+
+echo "==> 💁 [ASDF] install tools"
+case $PROCESSOR in
+M1)
+  echo "===> 💁 [ASDF] install for M1"
+  RUBY_CFLAGS=-DUSE_FFI_CLOSURE_ALLOC \
+    arch -arm64 \
+    asdf install
+  ;;
+
+x86_64)
+  echo "===> 💁 [ASDF] install for x86_64"
+  asdf install
+  ;;
+esac
+
+echo "==> 💁 [ASDF] reshim globals"
+asdf reshim
+
+echo "==> 💁 [ASDF] Done ✅"