TDEPS-70 Detect missing jar in classpath and recompute

CHANGELOG.md

@@ -5,7 +5,10 @@ Changelog
 
 clj has both stable and prerelease versions. Current and former stable build are listed in **bold** and are (or were) available from the default [brew formula](https://github.com/clojure/brew-install/). Other versions can be obtained using versioned formulas only.
 
-Prerelease versions: none
+Prerelease versions:
+
+* next
+  * TDEPS-70 - Detect missing jar in classpath and recompute
 
 **Current stable version:**
 

src/main/resources/clojure/install/clojure

@@ -355,12 +355,24 @@ if "$force" || "$trace" || "$tree" || "$prep" || [ ! -f "$cp_file" ]; then
 elif [[ -n "$tool_name" ]] && [ "$config_dir/tools/$tool_name.edn" -nt "$cp_file" ]; then
   stale=true
 else
+  # Are deps.edn files stale?
   for config_path in "${config_paths[@]}"; do
     if [ "$config_path" -nt "$cp_file" ]; then
       stale=true
       break
     fi
   done
+
+  # Are .jar files in classpath missing?
+  IFS=':'; read -ra cp_entries <<<"$(cat $cp_file)"
+  for cp_entry in "${cp_entries[@]}"; do
+    if [[ "$cp_entry" == *.jar && ! -f "$cp_entry" ]]; then
+      stale=true
+      break
+    fi
+  done
+
+  # Are manifest files in local/git deps stale?
   if [[ "$stale" = false && -f "$manifest_file" ]]; then
     set +e
     IFS=$'\n' read -ra manifest_files -d '' <"$manifest_file"