install.sh: install Homebrew, add bash, and seed the colour files

Three things a machine set up from this repo alone hit on its first run:

Homebrew was a dead end -- install.sh printed the command and exited, leaving
the one prerequisite everything else needs to be run by hand. It installs it
now, NONINTERACTIVE so it does not wait on a RETURN; the sudo password is still
asked for, which is why this script is run by hand.

bash was missing from the Brewfile, so bin/open and secrets/ ran under the
3.2 macOS ships and failed on `${v,,}`; config/bashrc also looks for the
bash-completion 2.x that wants 4.2.

Ghostty refused to start -- "error opening config-file ... error.FileNotFound"
-- because config-file pointed at the colour file bin/theme writes, which does
not exist until theme has run. The include is optional now (`?`), and this
script seeds the colour files when a machine has none, leaving a machine that
already has a theme alone.

1 files changed, 30 insertions, 1 deletions

diff --git a/install.sh b/install.sh
index 8870624..bdaba8f 100755
--- a/install.sh
+++ b/install.sh
@@ -28,8 +28,26 @@ if [[ "$(uname)" == "Darwin" ]]; then
       fi
     done
   fi
+  # Install Homebrew rather than print the command and stop: on a machine whose
+  # whole setup is this repo there is nothing else to run it, and everything
+  # below depends on it. NONINTERACTIVE so it does not wait on a RETURN it will
+  # never see; it still asks for the sudo password, which is why this script is
+  # run by hand and not on a timer.
   if ! command -v brew >/dev/null 2>&1; then
-    >&2 echo "ERROR: Homebrew is not installed. Install it first, then re-run this:"
+    echo "Homebrew is not installed; installing it now"
+    NONINTERACTIVE=1 /bin/bash -c \
+      "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"
+    for b in /opt/homebrew/bin/brew /usr/local/bin/brew; do
+      if [[ -x "${b}" ]]; then
+        eval "$("${b}" shellenv)"
+        break
+      fi
+    done
+  fi
+  if ! command -v brew >/dev/null 2>&1; then
+    >&2 echo "ERROR: Homebrew still not on PATH after installing it. Install it"
+    >&2 echo "by hand, then re-run this script:"
+    # shellcheck disable=SC2016  # printed for a human to paste, not expanded
     >&2 echo '  /bin/bash -c "$(curl -fsSL https://raw.githubusercontent.com/Homebrew/install/HEAD/install.sh)"'
     exit 1
   fi
@@ -63,6 +81,17 @@ if command -v nvim >/dev/null 2>&1; then
   nvim --headless "+Lazy! install" +qa || true
 fi
 
+# 4. The colours the terminals, tmux, nvim and bat read. bin/theme writes those
+#    files under $XDG_DATA_HOME; until it has run once they are absent, which
+#    every config tolerates -- nothing is themed, that is all. Seeded here only
+#    when this machine has none, with whatever mode and colourscheme `theme`
+#    reports (its own defaults on a fresh machine), so re-running this script
+#    never disturbs a machine whose theme is already set.
+theme_bin="${dotfiles_dir}/bin/theme"
+if [[ ! -e "${XDG_DATA_HOME:-${HOME}/.local/share}/tmux/color.conf" && -x "${theme_bin}" ]]; then
+  "${theme_bin}" --set "$("${theme_bin}" --mode)" "$("${theme_bin}" --colors)" || true
+fi
+
 if [[ "$(uname)" == "Darwin" ]]; then
   echo
   echo "Setting up a new Mac? Also run this, once:"