LSP Configuration

scripts/jdtls

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+#!/bin/sh
+# jdtls launcher: the eclipse.jdt.ls project ships no bin/jdtls of its own --
+# every consumer (nvim-jdtls, mason.nvim, coc-java, etc.) hand-writes one, so
+# this mirrors that same well-established convention. Installed at
+# /usr/local/bin/jdtls by the Containerfile so OpenCode's Java LSP
+# integration (which has no auto-download fallback for jdtls, unlike gopls)
+# can find a bare `jdtls` command on PATH.
+set -eu
+
+JDTLS_HOME=/opt/jdtls
+
+# jdtls requires a persistent, project-specific workspace dir (`-data`): the
+# same one must be reused across restarts for a given project, and different
+# projects must NOT share one (jdtls indexes it as if it were a single
+# workspace). Derived from a hash of the real project path and stored under
+# OpenCode's own host-persisted data dir (see the Makefile's DATA_DIR bind
+# mount) so it survives container restarts instead of vanishing with `--rm`.
+workspace_hash=$(printf '%s' "$(pwd -P)" | cksum | cut -d' ' -f1)
+data_dir="$HOME/.local/share/opencode/jdtls-workspaces/$workspace_hash"
+mkdir -p "$data_dir"
+
+launcher=$(ls "$JDTLS_HOME"/plugins/org.eclipse.equinox.launcher_*.jar 2>/dev/null | head -n1)
+if [ -z "$launcher" ]; then
+  echo "jdtls: equinox launcher jar not found under $JDTLS_HOME/plugins" >&2
+  exit 1
+fi
+
+exec java \
+  --add-modules=ALL-SYSTEM \
+  --add-opens java.base/java.util=ALL-UNNAMED \
+  --add-opens java.base/java.lang=ALL-UNNAMED \
+  -Declipse.application=org.eclipse.jdt.ls.core.id1 \
+  -Dosgi.bundles.defaultStartLevel=4 \
+  -Declipse.product=org.eclipse.jdt.ls.core.product \
+  -Dlog.protocol=true -Dlog.level=ALL -Xmx1G \
+  -jar "$launcher" \
+  -configuration "$JDTLS_HOME/config_linux" \
+  -data "$data_dir" \
+  "$@"