Make using check-version.sh support and/or

check-version.sh

@@ -1,13 +1,29 @@
 #!/usr/bin/env bash
 
-# Compare the current tmux version against a given version.
-# Exit: 0 if comparison is true, 1 if false
+# Compare the current tmux version against one or more version constraints.
+#
+# Each constraint pairs an operator and version in a single argument,
+# e.g. ">= 3.2". Multiple constraints can be joined with the logical operators
+# `and` / `or`, where `and` binds tighter than `or` (standard precedence). This
+# allows a single invocation to express a range without spawning the script
+# multiple times.
+#
+# Exit: 0 if the whole expression is true, 1 if false
+#
+# Examples:
+#   check-version.sh ">= 3.2"
+#   check-version.sh ">= 3.2" and "< 3.3"
+#   check-version.sh "< 2.9" or ">= 3.4"
 
 set -euo pipefail
 
 usage() {
-  echo "usage: $0 <operator> <version>" >&2
-  echo "operators: < <= == >= >" >&2
+  cat >&2 <<'EOF'
+usage: check-version.sh <constraint> [and|or <constraint> ...]
+  constraint: <operator> <version>, e.g. ">= 3.2"
+  operators:  < <= == >= >
+  logical:    and or  (and binds tighter than or)
+EOF
 }
 
 if [[ ${1:-} == "-h" || ${1:-} == "--help" ]]; then
@@ -15,14 +31,11 @@ if [[ ${1:-} == "-h" || ${1:-} == "--help" ]]; then
   exit 0
 fi
 
-if [[ $# -ne 2 ]]; then
+if [[ $# -eq 0 ]]; then
   usage
   exit 1
 fi
 
-operator="$1"
-target_version="$2"
-
 # Extract tmux version (e.g., "tmux 3.3a" -> "3.3a")
 current_version=$(tmux -V | sed 's/^tmux //')
 
@@ -75,22 +88,78 @@ compare_versions() {
   echo 0
 }
 
-result=$(compare_versions "$current_version" "$target_version")
+# Evaluate a single constraint (e.g. ">= 3.2") against the current version.
+# Returns 0 (true) or 1 (false); exits on a malformed constraint.
+eval_constraint() {
+  local constraint="$1"
+  local operator version
+  read -r operator version <<< "$constraint"
 
-case "$operator" in
-  '<')
-    [[ "$result" -eq -1 ]] && exit 0 || exit 1 ;;
-  '<=')
-    [[ "$result" -le 0 ]] && exit 0 || exit 1 ;;
-  '==')
-    [[ "$result" -eq 0 ]] && exit 0 || exit 1 ;;
-  '>=')
-    [[ "$result" -ge 0 ]] && exit 0 || exit 1 ;;
-  '>')
-    [[ "$result" -eq 1 ]] && exit 0 || exit 1 ;;
-  *)
-    echo "error: invalid operator: $operator" >&2
+  if [[ -z "$operator" || -z "$version" ]]; then
+    echo "error: invalid constraint: '$constraint' (expected '<operator> <version>', e.g. '>= 3.2')" >&2
     usage
     exit 1
-    ;;
-esac
+  fi
+
+  local result
+  result=$(compare_versions "$current_version" "$version")
+
+  case "$operator" in
+    '<')  [[ "$result" -eq -1 ]] ;;
+    '<=') [[ "$result" -le 0 ]] ;;
+    '==') [[ "$result" -eq 0 ]] ;;
+    '>=') [[ "$result" -ge 0 ]] ;;
+    '>')  [[ "$result" -eq 1 ]] ;;
+    *)
+      echo "error: invalid operator: '$operator'" >&2
+      usage
+      exit 1 ;;
+  esac
+}
+
+# Walk the alternating constraint/logical sequence, accumulating each `and`
+# group (1 = true) and folding completed groups into the `or` result. Truth
+# values are tracked as ints and converted to an exit code at the end.
+or_result=0
+and_result=1
+expect=constraint
+
+for token in "$@"; do
+  if [[ "$expect" == "constraint" ]]; then
+    case "$token" in
+      and | or)
+        echo "error: expected a constraint, got logical operator: $token" >&2
+        usage
+        exit 1 ;;
+    esac
+    if eval_constraint "$token"; then
+      and_result=$(( and_result & 1 ))
+    else
+      and_result=$(( and_result & 0 ))
+    fi
+    expect=logical
+  else
+    case "$token" in
+      and)
+        ;;
+      or)
+        or_result=$(( or_result | and_result ))
+        and_result=1 ;;
+      *)
+        echo "error: expected 'and' or 'or', got: $token" >&2
+        usage
+        exit 1 ;;
+    esac
+    expect=constraint
+  fi
+done
+
+if [[ "$expect" == "constraint" ]]; then
+  echo "error: expression ends with a logical operator" >&2
+  usage
+  exit 1
+fi
+
+or_result=$(( or_result | and_result ))
+
+[[ "$or_result" -eq 1 ]] && exit 0 || exit 1

tmux.conf

@@ -28,7 +28,7 @@ set -g status-interval 2
 set -g default-terminal "tmux-256color"
 
 # Enable true-color
-if '~/.config/tmux/check-version.sh "<" 3.2' \
+if '~/.config/tmux/check-version.sh "< 3.2"' \
   'set-option -as terminal-features ",xterm*:Tc"' \
   'set-option -as terminal-features ",xterm*:RGB"'
 
@@ -52,7 +52,7 @@ unbind -T copy-mode-vi MouseDragEnd1Pane
 # Enable changing cursor shape per pane, vim or zsh should emit escape
 # sequences to change cursor shape.
 # iTerm2 only requires this before tmux 2.9
-if '[ -n $ITERM_PROFILE ] && ~/.config/tmux/check-version.sh "<" 2.9' \
+if '[ -n $ITERM_PROFILE ] && ~/.config/tmux/check-version.sh "< 2.9"' \
   'set -ga terminal-overrides "*:Ss=\E]1337;CursorShape=%p1%d\7"'
 # VTE compatible terminals.
 if '[ ! -n $ITERM_PROFILE ]' \
@@ -61,7 +61,7 @@ if '[ ! -n $ITERM_PROFILE ]' \
 # Enable strikethrough on VTE compatible terminals.
 set -ga terminal-overrides 'xterm*:smxx=\E[9m'
 
-if -b '~/.config/tmux/check-version.sh ">=" 3.2 && ~/.config/tmux/check-version.sh "<" 3.3' {
+if -b '~/.config/tmux/check-version.sh ">= 3.2" and "< 3.3"' {
   bind A if -F '#{==:#{session_name},agent}' { detach-client } {
     display-popup -d '#{pane_current_path}' -w 50% -h 90% -E ~/.config/tmux/agent.sh
   }
@@ -72,7 +72,7 @@ if -b '~/.config/tmux/check-version.sh ">=" 3.2 && ~/.config/tmux/check-version.
   bind S display-popup -w 60 -h 10 -E ~/.config/tmux/session.sh
   bind T display-popup -d '#{pane_current_path}' -E $SHELL
 }
-if -b '~/.config/tmux/check-version.sh ">=" 3.3' {
+if -b '~/.config/tmux/check-version.sh ">= 3.3"' {
   bind A if -F '#{==:#{session_name},agent}' { detach-client } {
     display-popup -S fg=#54546D -b rounded -d '#{pane_current_path}' -w 75% -h 90% -E ~/.config/tmux/agent.sh
   }