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[gnome-builder/wip/gtk4-port] plugins/eslint: port eslint plugin to C

commit 63850a06eb554eac78a1e6dd231b6231f422ec03
Author: Christian Hergert <chergert redhat com>
Date:   Wed May 25 22:05:26 2022 -0700

    plugins/eslint: port eslint plugin to C
    
    Related #1670

 src/plugins/eslint/eslint-plugin.c                 |  37 ++++
 src/plugins/eslint/eslint.gresource.xml            |   6 +
 src/plugins/eslint/eslint.plugin                   |  14 +-
 src/plugins/eslint/eslint_plugin.py                |  84 ---------
 .../eslint/gbp-eslint-diagnostic-provider.c        | 188 +++++++++++++++++++++
 .../eslint/gbp-eslint-diagnostic-provider.h        |  31 ++++
 src/plugins/eslint/meson.build                     |  19 ++-
 7 files changed, 279 insertions(+), 100 deletions(-)
---
diff --git a/src/plugins/eslint/eslint-plugin.c b/src/plugins/eslint/eslint-plugin.c
new file mode 100644
index 000000000..8014cc9fc
--- /dev/null
+++ b/src/plugins/eslint/eslint-plugin.c
@@ -0,0 +1,37 @@
+/* eslint-plugin.c
+ *
+ * Copyright 2022 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#define G_LOG_DOMAIN "eslint-plugin"
+
+#include "config.h"
+
+#include <libpeas/peas.h>
+
+#include <libide-code.h>
+
+#include "gbp-eslint-diagnostic-provider.h"
+
+_IDE_EXTERN void
+_gbp_eslint_register_types (PeasObjectModule *module)
+{
+  peas_object_module_register_extension_type (module,
+                                              IDE_TYPE_DIAGNOSTIC_PROVIDER,
+                                              GBP_TYPE_ESLINT_DIAGNOSTIC_PROVIDER);
+}
diff --git a/src/plugins/eslint/eslint.gresource.xml b/src/plugins/eslint/eslint.gresource.xml
new file mode 100644
index 000000000..fdc8ce996
--- /dev/null
+++ b/src/plugins/eslint/eslint.gresource.xml
@@ -0,0 +1,6 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gresources>
+  <gresource prefix="/plugins/eslint">
+    <file>eslint.plugin</file>
+  </gresource>
+</gresources>
diff --git a/src/plugins/eslint/eslint.plugin b/src/plugins/eslint/eslint.plugin
index 0341f7cfc..1eafe47ed 100644
--- a/src/plugins/eslint/eslint.plugin
+++ b/src/plugins/eslint/eslint.plugin
@@ -1,11 +1,9 @@
 [Plugin]
-Authors=Georg Vienna <georg vienna himbarsoft com>
-Copyright=Copyright © 2017 Georg Vienna <georg vienna himbarsoft com>
-Description=Provides javascript lints
-Loader=python3
-Hidden=true
-Module=eslint_plugin
-Name=eslint
+Authors=Georg Vienna <georg vienna himbarsoft com>, Christian Hergert <chergert redhat com>
+Copyright=Copyright © 2017 Georg Vienna, Copyright © 2022 Christian Hergert
+Description=Provides linting of JavaScript and TypeScript files using eslint
+Embedded=_gbp_eslint_register_types
+Module=eslint
+Name=ESLint
 X-Diagnostic-Provider-Languages-Priority=100
 X-Diagnostic-Provider-Languages=js,typescript
-X-Builder-ABI=@PACKAGE_ABI@
diff --git a/src/plugins/eslint/gbp-eslint-diagnostic-provider.c 
b/src/plugins/eslint/gbp-eslint-diagnostic-provider.c
new file mode 100644
index 000000000..073d71c1d
--- /dev/null
+++ b/src/plugins/eslint/gbp-eslint-diagnostic-provider.c
@@ -0,0 +1,188 @@
+/* gbp-eslint-diagnostic-provider.c
+ *
+ * Copyright 2021 Jeremy Wilkins <jeb jdwilkins co uk>
+ * Copyright 2022 Veli Tasalı <me velitasali com>
+ * Copyright 2022 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#define G_LOG_DOMAIN "gbp-eslint-diagnostic-provider"
+
+/* TODO: Comes from typescript-language-server but we'd like to remove
+ *       that and push it of to an external plugin.
+ */
+#define BUNDLED_ESLINT 
"/app/lib/yarn/global/node_modules/typescript-language-server/node_modules/eslint/bin/eslint.js"
+
+#include "config.h"
+
+#include <json-glib/json-glib.h>
+
+#include "gbp-eslint-diagnostic-provider.h"
+
+struct _GbpEslintDiagnosticProvider
+{
+  IdeDiagnosticTool parent_instance;
+  guint is_stdin : 1;
+};
+
+static void
+gbp_eslint_diagnostic_provider_configure_launcher (IdeDiagnosticTool     *tool,
+                                                   IdeSubprocessLauncher *launcher,
+                                                   GFile                 *file,
+                                                   GBytes                *contents,
+                                                   const char            *language_id)
+{
+  GbpEslintDiagnosticProvider *self = (GbpEslintDiagnosticProvider *)tool;
+
+  g_assert (GBP_IS_ESLINT_DIAGNOSTIC_PROVIDER (self));
+  g_assert (IDE_IS_SUBPROCESS_LAUNCHER (launcher));
+  g_assert (G_IS_FILE (file));
+
+  ide_subprocess_launcher_push_args (launcher,
+                                     IDE_STRV_INIT ("-f", "json",
+                                                    "--ignore-pattern", "!node_modules/*",
+                                                    "--ignore-pattern", "!bower_components/*"));
+  if (contents != NULL)
+    ide_subprocess_launcher_push_args (launcher, IDE_STRV_INIT ("--stdin", "--stdin-filename"));
+  ide_subprocess_launcher_push_argv (launcher, g_file_peek_path (file));
+}
+
+static inline IdeDiagnosticSeverity
+parse_severity (int n)
+{
+  switch (n)
+    {
+    case 1:
+      return IDE_DIAGNOSTIC_WARNING;
+    case 2:
+      return IDE_DIAGNOSTIC_ERROR;
+    default:
+      return IDE_DIAGNOSTIC_NOTE;
+    }
+}
+
+static void
+gbp_eslint_diagnostic_provider_populate_diagnostics (IdeDiagnosticTool *tool,
+                                                     IdeDiagnostics    *diagnostics,
+                                                     GFile             *file,
+                                                     const char        *stdout_buf,
+                                                     const char        *stderr_buf)
+{
+  GbpEslintDiagnosticProvider *self = (GbpEslintDiagnosticProvider *)tool;
+  g_autoptr(JsonParser) parser = NULL;
+  g_autoptr(GError) error = NULL;
+  JsonNode *root;
+  JsonArray *results;
+
+  g_assert (GBP_IS_ESLINT_DIAGNOSTIC_PROVIDER (self));
+  g_assert (IDE_IS_DIAGNOSTICS (diagnostics));
+  g_assert (G_IS_FILE (file));
+
+  if (ide_str_empty0 (stdout_buf))
+    return;
+
+  parser = json_parser_new ();
+
+  if (!json_parser_load_from_data (parser, stdout_buf, -1, &error))
+    {
+      g_debug ("%s", error->message);
+      return;
+    }
+
+  if ((root = json_parser_get_root (parser)) &&
+      JSON_NODE_HOLDS_ARRAY (root) &&
+      (results = json_node_get_array (root)))
+    {
+      guint n_results = json_array_get_length (results);
+
+      for (guint r = 0; r < n_results; r++)
+        {
+          JsonObject *result = json_array_get_object_element (results, r);
+          JsonArray *messages = json_object_get_array_member (result, "messages");
+          guint n_messages = json_array_get_length (messages);
+
+          for (guint m = 0; m < n_messages; m++)
+            {
+              JsonObject *message = json_array_get_object_element (messages, m);
+              g_autoptr(IdeDiagnostic) diagnostic = NULL;
+              g_autoptr(IdeLocation) start = NULL;
+              g_autoptr(IdeLocation) end = NULL;
+              IdeDiagnosticSeverity severity;
+              guint start_line;
+              guint start_col;
+
+              if (!json_object_has_member (message, "line") ||
+                  !json_object_has_member (message, "column"))
+                continue;
+
+              start_line = MAX (json_object_get_int_member (message, "line"), 1) - 1;
+              start_col = MAX (json_object_get_int_member (message, "column"), 1) - 1;
+              start = ide_location_new (file, start_line, start_col);
+
+              if (json_object_has_member (message, "endLine") &&
+                  json_object_has_member (message, "endColumn"))
+                {
+                  guint end_line = MAX (json_object_get_int_member (message, "endLine"), 1) - 1;
+                  guint end_col = MAX (json_object_get_int_member (message, "endColumn"), 1) - 1;
+
+                  end = ide_location_new (file, end_line, end_col);
+                }
+
+              severity = parse_severity (json_object_get_int_member (message, "severity"));
+
+              diagnostic = ide_diagnostic_new (severity,
+                                               json_object_get_string_member (message, "message"),
+                                               start);
+              if (end != NULL)
+                ide_diagnostic_take_range (diagnostic, ide_range_new (start, end));
+
+              /* TODO: (from python implementation)
+               *
+               * if 'fix' in message:
+               * Fixes often come without end* information so we
+               * will rarely get here, instead it has a file offset
+               * which is not actually implemented in IdeSourceLocation
+               * fixit = Ide.Fixit.new(range_, message['fix']['text'])
+               * diagnostic.take_fixit(fixit)
+               */
+
+              ide_diagnostics_add (diagnostics, diagnostic);
+            }
+        }
+    }
+}
+
+G_DEFINE_FINAL_TYPE (GbpEslintDiagnosticProvider, gbp_eslint_diagnostic_provider, IDE_TYPE_DIAGNOSTIC_TOOL)
+
+static void
+gbp_eslint_diagnostic_provider_class_init (GbpEslintDiagnosticProviderClass *klass)
+{
+  IdeDiagnosticToolClass *diagnostic_tool_class = IDE_DIAGNOSTIC_TOOL_CLASS (klass);
+
+  diagnostic_tool_class->configure_launcher = gbp_eslint_diagnostic_provider_configure_launcher;
+  diagnostic_tool_class->populate_diagnostics = gbp_eslint_diagnostic_provider_populate_diagnostics;
+}
+
+static void
+gbp_eslint_diagnostic_provider_init (GbpEslintDiagnosticProvider *self)
+{
+  g_autofree char *local_program_path = g_build_filename ("node_modules", ".bin", "eslint", NULL);
+
+  ide_diagnostic_tool_set_program_name (IDE_DIAGNOSTIC_TOOL (self), "eslint");
+  ide_diagnostic_tool_set_bundled_program_path (IDE_DIAGNOSTIC_TOOL (self), BUNDLED_ESLINT);
+  ide_diagnostic_tool_set_local_program_path (IDE_DIAGNOSTIC_TOOL (self), local_program_path);
+}
diff --git a/src/plugins/eslint/gbp-eslint-diagnostic-provider.h 
b/src/plugins/eslint/gbp-eslint-diagnostic-provider.h
new file mode 100644
index 000000000..85080780c
--- /dev/null
+++ b/src/plugins/eslint/gbp-eslint-diagnostic-provider.h
@@ -0,0 +1,31 @@
+/* gbp-eslint-diagnostic-provider.h
+ *
+ * Copyright 2022 Christian Hergert <chergert redhat com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+#pragma once
+
+#include <libide-foundry.h>
+
+G_BEGIN_DECLS
+
+#define GBP_TYPE_ESLINT_DIAGNOSTIC_PROVIDER (gbp_eslint_diagnostic_provider_get_type())
+
+G_DECLARE_FINAL_TYPE (GbpEslintDiagnosticProvider, gbp_eslint_diagnostic_provider, GBP, 
ESLINT_DIAGNOSTIC_PROVIDER, IdeDiagnosticTool)
+
+G_END_DECLS
diff --git a/src/plugins/eslint/meson.build b/src/plugins/eslint/meson.build
index 2b4880c3b..adeea551b 100644
--- a/src/plugins/eslint/meson.build
+++ b/src/plugins/eslint/meson.build
@@ -1,13 +1,16 @@
 if get_option('plugin_eslint')
 
-install_data('eslint_plugin.py', install_dir: plugindir)
-
-configure_file(
-          input: 'eslint.plugin',
-         output: 'eslint.plugin',
-  configuration: config_h,
-        install: true,
-    install_dir: plugindir,
+plugins_sources += files([
+  'eslint-plugin.c',
+  'gbp-eslint-diagnostic-provider.c',
+])
+
+plugin_eslint_resources = gnome.compile_resources(
+  'eslint-resources',
+  'eslint.gresource.xml',
+  c_name: 'gbp_eslint',
 )
 
+plugins_sources += plugin_eslint_resources
+
 endif
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