jdt-ls: init at 0.67.0

pkgs/development/tools/jdt-ls/default.nix

@@ -0,0 +1,58 @@
+{ lib
+, stdenv
+, fetchurl
+, jdk
+, bash
+}:
+
+stdenv.mkDerivation rec {
+  pname = "jdt-ls";
+  version = "0.67.0";
+  timestamp = "202012170459";
+
+  src = fetchurl {
+    url = "https://download.eclipse.org/jdtls/milestones/${version}/jdt-language-server-${version}-${timestamp}.tar.gz";
+    sha256 = "11qzwf2l737hdv1g7bfcrmdxcrl7g9z2k9nhy9lknlabmhq4mcdl";
+  };
+
+  # After running unpackPhase, the generic builder changes the current directory
+  # to the directory created by unpacking the sources. If there are multiple
+  # source directories, you should set sourceRoot to the name of the intended
+  # directory.
+  sourceRoot = ".";
+
+  buildInputs = [
+    bash
+    jdk
+  ];
+
+  installPhase =
+    let
+      # There are config_ss_* directories too, use them to run the lightweight
+      # version, see
+      # https://github.com/eclipse/eclipse.jdt.ls/wiki/Running-the-lightweight-syntax-language-server
+      config-path = if stdenv.isDarwin then "config_mac" else "config_linux";
+    in
+    ''
+      JARs_dir=$out/share/plugins
+
+      # Copy files
+      install -Dm 444 -t $JARs_dir plugins/*.jar
+      install -Dm 444 -t $out/share/config ${config-path}/*
+      install -Dm 755 ${./jdt-ls-wrapper.sh} $out/bin/jdt-ls
+
+      launcher="$(ls $JARs_dir/org.eclipse.equinox.launcher_* | sort -V | tail -n1)"
+      substituteInPlace $out/bin/jdt-ls \
+        --subst-var-by shell ${bash}/bin/bash \
+        --subst-var-by jdk ${jdk}/bin/java \
+        --subst-var-by config_path $out/share/config \
+        --subst-var launcher
+    '';
+
+  meta = with lib; {
+    homepage = "https://github.com/eclipse/eclipse.jdt.ls";
+    description = "Java language server";
+    license = licenses.epl20;
+    maintainers = with maintainers; [ matt-snider jlesquembre ];
+  };
+}

pkgs/development/tools/jdt-ls/jdt-ls-wrapper.sh

@@ -0,0 +1,135 @@
+#!@shell@
+
+# This script is a wrapper around jdt.ls.
+# jdt.ls is distributed as a jar file. To launch a java jar application, we
+# need to run this command:
+# java $JAVA_OPTIONS -jar /paht/to/jdt.ls.jar $APP_OPTIONS
+
+# Some options are harcoded in the script (only one specific value makes sense
+# for those).
+# For other options, a sensible default is provided but it's possible to
+# override its value.
+# The script adds an argument, --java-opts, to add more java options.
+# Any other arguments will be considered jdt.ls options, and appended to the
+# command.
+
+# Documentation about the arguments:
+# https://github.com/eclipse/eclipse.jdt.ls/wiki/Running-the-JAVA-LS-server-from-the-command-line
+# Some of the values are the recommended by the nvim client:
+# https://github.com/mfussenegger/nvim-jdtls#language-server-installation
+
+# Script hardcoded arguments
+
+## jdt.ls options:
+## --add-modules=ALL-SYSTEM
+## --add-opens java.base/java.util=ALL-UNNAMED
+## --add-opens java.base/java.lang=ALL-UNNAMED
+##     Those are needed to start jdt.ls, see
+##     https://github.com/eclipse/eclipse.jdt.ls/wiki/Running-the-JAVA-LS-server-from-the-command-line
+
+# Script overrideable arguments
+
+## Java options:
+## -Xms1g
+##     Sets the initial size of the heap
+## -Xmx2G
+##     Specifies the maximum size of the memory allocation pool in bytes
+## -Dlog.level=INFO
+##     Set the log level system property. This value is read by jdt.ls
+## --java-opts
+##     Extra options to the java command, empty by default
+##     Notice that instead you can also use the JDK_JAVA_OPTIONS (requires Java 9)
+##     and the JAVA_TOOL_OPTIONS environment variable. For more info see:
+##     https://docs.oracle.com/en/java/javase/11/tools/java.html#GUID-3B1CE181-CD30-4178-9602-230B800D4FAE
+##     https://docs.oracle.com/en/java/javase/11/troubleshoot/environment-variables-and-system-properties.html#GUID-BE6E7B7F-A4BE-45C0-9078-AA8A66754B97
+
+## jdt.ls options:
+## -configuration
+##     Path to the configuration directory. A config.ini file is expected in
+##     this directory (for more info see jdt.ls docs). The script will copy here
+##     a valid config.ini file from the nix store. The properties on this file can
+##     be overriden with the java -D option
+##     Logs are also writen in this directory.
+##     Logs and config directories are mixed, see
+##     https://github.com/eclipse/eclipse.jdt.ls/issues/1097
+##     By default we create a temporary directory, since the directory has to
+##     be writable, and the language server logs are usually not important to the end user.
+##     If you don't override the default value, this directory is deleted when the script exits
+## -data
+##     Data directory (also called workspace directory in jdt.ls docs) is used as
+##     some kind of cache by jdt.ls. For that reason, we want to use different
+##     directories per project. Defaults to $XDG_CACHE_HOME/jdtls/`basename $PWD`
+##     Data directory CANNOT be in the project itself, it needs to be in a different
+##     directory
+
+# Example:
+
+# jdt-ls -Xms500M --java-opts "-Xdiag -showversion" -data /tmp/jdtls_workspace
+#
+# === executes ===>
+#
+# java \
+#  -Xms500M \
+#  -Xmx2G \
+#  -Dlog.level=INFO  \
+#  -Xdiag \
+#  -showversion \
+#  -jar /nix/store/...equinox.launcher.jar \
+#  --add-modules=ALL-SYSTEM \
+#  --add-opens java.base/java.util=ALL-UNNAMED \
+#  --add-opens java.base/java.lang=ALL-UNNAMED \
+#  -configuration /tmp/jdtls_config/stXVO \
+#  -data /tmp/jdtls_workspace
+
+# Java options
+log_level="-Dlog.level=INFO"
+xms="-Xms1g"
+xmx="-Xmx2G"
+
+# jdt.ls options
+mkdir -p /tmp/jdtls_config
+configuration="$(mktemp -d /tmp/jdtls_config/XXXXX)"
+trap "{ rm -rf $configuration; }" EXIT
+
+data="${XDG_CACHE_HOME:-$HOME/.cache}/jdtls/${PWD##*/}"
+
+# Parse the arguments
+params=("$@")
+extra_java_options=()
+extra_args=()
+for ((n = 0; n < ${#params[*]}; n += 1)); do
+    p="${params[$n]}"
+    if [[ "$p" == "-Dlog.level="* ]]; then
+        log_level="$p"
+    elif [[ "$p" == "-Xms"* ]]; then
+        xms="$p"
+    elif [[ "$p" == "-Xmx"* ]]; then
+        xmx="$p"
+    elif [[ "$p" == "--java-opts" ]]; then
+        extra_java_options="${params[$((n + 1))]}"
+        n=$((n + 1))
+    elif [[ "$p" == "-configuration" ]]; then
+        configuration="${params[$((n + 1))]}"
+        n=$((n + 1))
+    elif [[ "$p" == "-data" ]]; then
+        data="${params[$((n + 1))]}"
+        n=$((n + 1))
+    else
+        extra_args+=("$p")
+    fi
+done
+
+cp @config_path@/config.ini "$configuration"
+
+# use java version from PATH, @jdk@ as fallback
+java_bin=$(command -v java || echo "@jdk@")
+$java_bin \
+    "$xms" \
+    "$xmx" \
+    "$log_level" \
+    $extra_java_options -jar @launcher@ \
+    --add-modules=ALL-SYSTEM \
+    --add-opens java.base/java.util=ALL-UNNAMED \
+    --add-opens java.base/java.lang=ALL-UNNAMED \
+    -configuration "$configuration" \
+    -data "$data" ${extra_args[@]}

pkgs/top-level/all-packages.nix

@@ -19650,6 +19650,8 @@ in
 
   iwona = callPackage ../data/fonts/iwona { };
 
+  jdt-ls = callPackage ../development/tools/jdt-ls { };
+
   jetbrains-mono = callPackage ../data/fonts/jetbrains-mono { };
 
   jost = callPackage ../data/fonts/jost { };