vscode patch script for jdtls using maxj/ecj

replace-jdtls-plugins.sh

#!/bin/bash
# Replace VSCode's JDTLS plugins with custom patched versions
# This replaces the actual JDTLS server files in the extension directory

set -e

RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m'

CUSTOM_REPO="/Users/hpeters/repos/eclipse.platform.releng.aggregator"
CUSTOM_PLUGINS_DIR="${CUSTOM_REPO}/eclipse.jdt.ls/org.eclipse.jdt.ls.product/target/repository/plugins"
VSCODE_EXT_DIR="/Users/hpeters/.vscode/extensions/redhat.java-1.51.0-darwin-arm64"
VSCODE_PLUGINS_DIR="${VSCODE_EXT_DIR}/server/plugins"

echo -e "${BLUE}=== Replacing JDTLS Plugins in VSCode Extension ===${NC}\n"

# Check if custom plugins exist
if [ ! -d "${CUSTOM_PLUGINS_DIR}" ]; then
    echo -e "${RED}Error: Custom JDTLS plugins not found${NC}"
    echo "Please build the custom JDTLS first:"
    echo "  cd ${CUSTOM_REPO}"
    echo "  mvn clean install"
    exit 1
fi

# Check if VSCode extension exists
if [ ! -d "${VSCODE_PLUGINS_DIR}" ]; then
    echo -e "${RED}Error: VSCode Java extension not found${NC}"
    echo "Please install 'Extension Pack for Java' in VSCode"
    exit 1
fi

echo -e "${GREEN}✓ Custom plugins found: ${CUSTOM_PLUGINS_DIR}${NC}"
echo -e "${GREEN}✓ VSCode extension found: ${VSCODE_PLUGINS_DIR}${NC}\n"

# Create backup
BACKUP_DIR="${VSCODE_PLUGINS_DIR}.backup.$(date +%Y%m%d_%H%M%S)"
if [ ! -d "${VSCODE_PLUGINS_DIR}.backup" ]; then
    echo -e "${BLUE}Creating backup of original plugins...${NC}"
    cp -r "${VSCODE_PLUGINS_DIR}" "${BACKUP_DIR}"
    echo -e "${GREEN}✓ Backup created: ${BACKUP_DIR}${NC}\n"
fi

# Find all org.eclipse.jdt.core* plugins in custom build
CUSTOM_CORE_PLUGINS=$(find "${CUSTOM_PLUGINS_DIR}" -name "org.eclipse.jdt.core*.jar" -type f)

if [ -z "${CUSTOM_CORE_PLUGINS}" ]; then
    echo -e "${RED}Error: No org.eclipse.jdt.core plugins found in custom build${NC}"
    exit 1
fi

echo -e "${BLUE}Replacing JDTLS core plugins...${NC}"

# Replace each plugin by matching base name (ignoring version)
for custom_plugin in ${CUSTOM_CORE_PLUGINS}; do
    # Extract plugin prefix (e.g., "org.eclipse.jdt.core" from "org.eclipse.jdt.core_3.42.0.v20250606-1600.jar")
    plugin_prefix=$(basename "${custom_plugin}" | sed 's/_[0-9].*//')
    
    # Find matching plugin in VSCode extension by prefix
    vscode_plugin=$(find "${VSCODE_PLUGINS_DIR}" -name "${plugin_prefix}_*.jar" | head -1)
    
    if [ -n "${vscode_plugin}" ]; then
        vscode_name=$(basename "${vscode_plugin}")
        custom_name=$(basename "${custom_plugin}")
        echo "  Replacing: ${vscode_name}"
        echo "    With:     ${custom_name}"
        # Backup original
        if [ ! -f "${vscode_plugin}.orig" ]; then
            cp "${vscode_plugin}" "${vscode_plugin}.orig"
        fi
        # Replace with custom version (keep VSCode's filename to maintain references)
        cp "${custom_plugin}" "${vscode_plugin}"
        echo -e "    ${GREEN}✓ Replaced${NC}"
    else
        echo -e "  ${YELLOW}Warning: No matching plugin found for ${plugin_prefix}${NC}"
    fi
done

# Also replace the main JDTLS launcher and other critical plugins
echo ""
echo -e "${BLUE}Replacing other critical JDTLS plugins...${NC}"

# Replace org.eclipse.jdt.ls.core if it exists
CUSTOM_LS_CORE=$(find "${CUSTOM_PLUGINS_DIR}" -name "org.eclipse.jdt.ls.core*.jar" | head -1)
if [ -n "${CUSTOM_LS_CORE}" ]; then
    VSCODE_LS_CORE=$(find "${VSCODE_PLUGINS_DIR}" -name "org.eclipse.jdt.ls.core*.jar" | head -1)
    if [ -n "${VSCODE_LS_CORE}" ]; then
        echo "  Replacing: $(basename "${VSCODE_LS_CORE}")"
        mv "${VSCODE_LS_CORE}" "${VSCODE_LS_CORE}.orig"
        cp "${CUSTOM_LS_CORE}" "${VSCODE_LS_CORE}"
        echo -e "    ${GREEN}✓ Replaced${NC}"
    fi
fi

# Replace equinox launcher if version differs
CUSTOM_LAUNCHER=$(find "${CUSTOM_PLUGINS_DIR}" -name "org.eclipse.equinox.launcher_*.jar" | head -1)
if [ -n "${CUSTOM_LAUNCHER}" ]; then
    VSCODE_LAUNCHER=$(find "${VSCODE_PLUGINS_DIR}" -name "org.eclipse.equinox.launcher_*.jar" | head -1)
    if [ -n "${VSCODE_LAUNCHER}" ]; then
        echo "  Replacing: $(basename "${VSCODE_LAUNCHER}")"
        mv "${VSCODE_LAUNCHER}" "${VSCODE_LAUNCHER}.orig"
        cp "${CUSTOM_LAUNCHER}" "${VSCODE_LAUNCHER}"
        echo -e "    ${GREEN}✓ Replaced${NC}"
    fi
fi

echo ""
echo -e "${GREEN}=== Replacement Complete ===${NC}\n"
echo "Next steps:"
echo "1. Close VSCode completely"
echo "2. Restart VSCode"
echo "3. Open a Java file with custom operators"
echo "4. Check that red squiggles are gone"
echo ""
echo -e "${YELLOW}Note:${NC} You may need to run this script again if:"
echo "- VSCode updates the Java extension"
echo "- The extension gets reinstalled"