Fix verify scripts: prereq check and contrib CWD issue

- Add prerequisite check for gpg, java, flit, uv, svn at script start
  (fails early with clear error instead of cryptic flit-not-found)
- Fix contrib verify: cd to /tmp before running python imports to avoid
  CWD shadowing installed hamilton package with local repo directory

Author: skrawcz

scripts/verify-sub-packages/verify_contrib.sh

@@ -38,6 +38,14 @@ if [ -z "$VERSION" ] || [ -z "$RC" ]; then
 fi
 
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+# Check prerequisites
+for cmd in gpg java flit uv svn; do
+    if ! command -v "$cmd" > /dev/null 2>&1; then
+        echo "ERROR: $cmd is required but not found. Please install it."
+        exit 1
+    fi
+done
 PACKAGE="apache-hamilton-contrib"
 SRC_TAR="${PACKAGE}-${VERSION}-incubating-src.tar.gz"
 WHEEL="apache_hamilton_contrib-${VERSION}-py3-none-any.whl"
@@ -135,6 +143,9 @@ cd /tmp  # prevent '' in sys.path from resolving local hamilton checkout
 
 uv pip install -q "$ARTIFACTS_DIR/$WHEEL" apache-hamilton
 
+# Run from /tmp to avoid CWD shadowing the installed hamilton package
+cd /tmp
+
 python -c "import importlib.metadata; assert importlib.metadata.version('apache-hamilton-contrib') == '${VERSION}'"
 echo "  ✓ Version correct"
 

scripts/verify-sub-packages/verify_lsp.sh

@@ -38,6 +38,14 @@ if [ -z "$VERSION" ] || [ -z "$RC" ]; then
 fi
 
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+# Check prerequisites
+for cmd in gpg java flit uv svn; do
+    if ! command -v "$cmd" > /dev/null 2>&1; then
+        echo "ERROR: $cmd is required but not found. Please install it."
+        exit 1
+    fi
+done
 PACKAGE="apache-hamilton-lsp"
 SRC_TAR="${PACKAGE}-${VERSION}-incubating-src.tar.gz"
 WHEEL="apache_hamilton_lsp-${VERSION}-py3-none-any.whl"

scripts/verify-sub-packages/verify_sdk.sh

@@ -38,6 +38,14 @@ if [ -z "$VERSION" ] || [ -z "$RC" ]; then
 fi
 
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+# Check prerequisites
+for cmd in gpg java flit uv svn; do
+    if ! command -v "$cmd" > /dev/null 2>&1; then
+        echo "ERROR: $cmd is required but not found. Please install it."
+        exit 1
+    fi
+done
 PACKAGE="apache-hamilton-sdk"
 SRC_TAR="${PACKAGE}-${VERSION}-incubating-src.tar.gz"
 WHEEL="apache_hamilton_sdk-${VERSION}-py3-none-any.whl"

scripts/verify-sub-packages/verify_ui.sh

@@ -38,6 +38,14 @@ if [ -z "$VERSION" ] || [ -z "$RC" ]; then
 fi
 
 SCRIPT_DIR="$(cd "$(dirname "$0")" && pwd)"
+
+# Check prerequisites
+for cmd in gpg java flit uv svn; do
+    if ! command -v "$cmd" > /dev/null 2>&1; then
+        echo "ERROR: $cmd is required but not found. Please install it."
+        exit 1
+    fi
+done
 PACKAGE="apache-hamilton-ui"
 SRC_TAR="${PACKAGE}-${VERSION}-incubating-src.tar.gz"
 WHEEL="apache_hamilton_ui-${VERSION}-py3-none-any.whl"