Merge pull request #4191 from trilader/feature/projectinfo-from-source

 mintro: Allow introspect --projectinfo without build directory

5 files changed, 210 insertions, 32 deletions

diff --git a/docs/markdown/snippets/introspect_projectinfo.md b/docs/markdown/snippets/introspect_projectinfo.md
new file mode 100644
index 000000000..40558b88e
--- /dev/null
+++ b/docs/markdown/snippets/introspect_projectinfo.md
@@ -0,0 +1,35 @@
+## `introspect --projectinfo` can now be used without configured build directory
+
+This allows IDE integration to get information about the project before the user has configured a build directory.
+
+Before you could use `meson.py introspect --projectinfo build-directory`.
+Now you also can use `meson.py introspect --projectinfo project-dir/meson.build`.
+
+The output is similiar to the output with a build directory but additionally also includes information from `introspect --buildsystem-files`.
+
+For example `meson.py introspect --projectinfo test\ cases/common/47\ subproject\ options/meson.build`
+This outputs (pretty printed for readability):
+```
+{
+    "buildsystem_files": [
+        "meson_options.txt",
+        "meson.build"
+    ],
+    "name": "suboptions",
+    "version": null,
+    "descriptive_name": "suboptions",
+    "subprojects": [
+        {
+            "buildsystem_files": [
+                "subprojects/subproject/meson_options.txt",
+                "subprojects/subproject/meson.build"
+            ],
+            "name": "subproject",
+            "version": "undefined",
+            "descriptive_name": "subproject"
+        }
+    ]
+}
+```
+
+Both usages now include a new `descriptive_name` property which always shows the name set in the project.
diff --git a/mesonbuild/astinterpreter.py b/mesonbuild/astinterpreter.py
index 32d08450c..a447a5597 100644
--- a/mesonbuild/astinterpreter.py
+++ b/mesonbuild/astinterpreter.py
@@ -18,7 +18,7 @@
 from . import interpreterbase, mlog, mparser, mesonlib
 from . import environment
 
-from .interpreterbase import InterpreterException, InvalidArguments
+from .interpreterbase import InterpreterException, InvalidArguments, BreakRequest, ContinueRequest
 
 import os, sys
 
@@ -46,7 +46,6 @@ REMOVE_SOURCE = 1
 class AstInterpreter(interpreterbase.InterpreterBase):
     def __init__(self, source_root, subdir):
         super().__init__(source_root, subdir)
-        self.asts = {}
         self.funcs.update({'project': self.func_do_nothing,
                            'test': self.func_do_nothing,
                            'benchmark': self.func_do_nothing,
@@ -76,7 +75,72 @@ class AstInterpreter(interpreterbase.InterpreterBase):
                            'vcs_tag': self.func_do_nothing,
                            'add_languages': self.func_do_nothing,
                            'declare_dependency': self.func_do_nothing,
-                           'files': self.func_files,
+                           'files': self.func_do_nothing,
+                           'executable': self.func_do_nothing,
+                           'static_library': self.func_do_nothing,
+                           'shared_library': self.func_do_nothing,
+                           'library': self.func_do_nothing,
+                           'build_target': self.func_do_nothing,
+                           'custom_target': self.func_do_nothing,
+                           'run_target': self.func_do_nothing,
+                           'subdir': self.func_do_nothing,
+                           'set_variable': self.func_do_nothing,
+                           'get_variable': self.func_do_nothing,
+                           'is_variable': self.func_do_nothing,
+                           })
+
+    def func_do_nothing(self, node, args, kwargs):
+        return True
+
+    def method_call(self, node):
+        return True
+
+    def evaluate_arithmeticstatement(self, cur):
+        return 0
+
+    def evaluate_plusassign(self, node):
+        return 0
+
+    def evaluate_indexing(self, node):
+        return 0
+
+    def unknown_function_called(self, func_name):
+        pass
+
+    def reduce_arguments(self, args):
+        assert(isinstance(args, mparser.ArgumentNode))
+        if args.incorrect_order():
+            raise InvalidArguments('All keyword arguments must be after positional arguments.')
+        return args.arguments, args.kwargs
+
+    def evaluate_comparison(self, node):
+        return False
+
+    def evaluate_foreach(self, node):
+        try:
+            self.evaluate_codeblock(node.block)
+        except ContinueRequest:
+            pass
+        except BreakRequest:
+            pass
+
+    def evaluate_if(self, node):
+        for i in node.ifs:
+            self.evaluate_codeblock(i.block)
+        if not isinstance(node.elseblock, mparser.EmptyNode):
+            self.evaluate_codeblock(node.elseblock)
+
+    def get_variable(self, varname):
+        return 0
+
+    def assignment(self, node):
+        pass
+
+class RewriterInterpreter(AstInterpreter):
+    def __init__(self, source_root, subdir):
+        super().__init__(source_root, subdir)
+        self.asts = {}
+        self.funcs.update({'files': self.func_files,
                            'executable': self.func_executable,
                            'static_library': self.func_static_lib,
                            'shared_library': self.func_shared_lib,
@@ -90,12 +154,6 @@ class AstInterpreter(interpreterbase.InterpreterBase):
                            'is_variable': self.func_is_variable,
                            })
 
-    def func_do_nothing(self, node, args, kwargs):
-        return True
-
-    def method_call(self, node):
-        return True
-
     def func_executable(self, node, args, kwargs):
         if args[0] == self.targetname:
             if self.operation == ADD_SOURCE:
@@ -147,21 +205,6 @@ class AstInterpreter(interpreterbase.InterpreterBase):
             return [args]
         return args
 
-    def evaluate_arithmeticstatement(self, cur):
-        return 0
-
-    def evaluate_plusassign(self, node):
-        return 0
-
-    def evaluate_indexing(self, node):
-        return 0
-
-    def reduce_arguments(self, args):
-        assert(isinstance(args, mparser.ArgumentNode))
-        if args.incorrect_order():
-            raise InvalidArguments('All keyword arguments must be after positional arguments.')
-        return args.arguments, args.kwargs
-
     def transform(self):
         self.load_root_meson_file()
         self.asts[''] = self.ast
@@ -181,9 +224,6 @@ class AstInterpreter(interpreterbase.InterpreterBase):
         self.filename = filename
         self.transform()
 
-    def unknown_function_called(self, func_name):
-        mlog.warning('Unknown function called: ' + func_name)
-
     def add_source_to_target(self, node, args, kwargs):
         namespan = node.args.arguments[0].bytespan
         buildfilename = os.path.join(self.source_root, self.subdir, environment.build_filename)
diff --git a/mesonbuild/mintro.py b/mesonbuild/mintro.py
index 4062299c0..48ec20faf 100644
--- a/mesonbuild/mintro.py
+++ b/mesonbuild/mintro.py
@@ -22,6 +22,9 @@ project files and don't need this info."""
 import json
 from . import build, mtest, coredata as cdata
 from . import mesonlib
+from . import astinterpreter
+from . import mparser
+from .interpreterbase import InvalidArguments
 from .backend import ninjabackend
 import sys, os
 import pathlib
@@ -178,14 +181,18 @@ def add_keys(optlist, options, section):
         optdict['description'] = opt.description
         optlist.append(optdict)
 
-def list_buildsystem_files(builddata):
-    src_dir = builddata.environment.get_source_dir()
+def find_buildsystem_files_list(src_dir):
     # I feel dirty about this. But only slightly.
     filelist = []
     for root, _, files in os.walk(src_dir):
         for f in files:
             if f == 'meson.build' or f == 'meson_options.txt':
                 filelist.append(os.path.relpath(os.path.join(root, f), src_dir))
+    return filelist
+
+def list_buildsystem_files(builddata):
+    src_dir = builddata.environment.get_source_dir()
+    filelist = find_buildsystem_files_list(src_dir)
     print(json.dumps(filelist))
 
 def list_deps(coredata):
@@ -219,19 +226,81 @@ def list_tests(testdata):
     print(json.dumps(result))
 
 def list_projinfo(builddata):
-    result = {'name': builddata.project_name, 'version': builddata.project_version}
+    result = {'version': builddata.project_version,
+              'descriptive_name': builddata.project_name}
     subprojects = []
     for k, v in builddata.subprojects.items():
         c = {'name': k,
-             'version': v}
+             'version': v,
+             'descriptive_name': builddata.projects.get(k)}
         subprojects.append(c)
     result['subprojects'] = subprojects
     print(json.dumps(result))
 
+class ProjectInfoInterperter(astinterpreter.AstInterpreter):
+    def __init__(self, source_root, subdir):
+        super().__init__(source_root, subdir)
+        self.funcs.update({'project': self.func_project})
+        self.project_name = None
+        self.project_version = None
+
+    def func_project(self, node, args, kwargs):
+        if len(args) < 1:
+            raise InvalidArguments('Not enough arguments to project(). Needs at least the project name.')
+        self.project_name = args[0]
+        self.project_version = kwargs.get('version', 'undefined')
+        if isinstance(self.project_version, mparser.ElementaryNode):
+            self.project_version = self.project_version.value
+
+    def set_variable(self, varname, variable):
+        pass
+
+    def analyze(self):
+        self.load_root_meson_file()
+        self.sanity_check_ast()
+        self.parse_project()
+        self.run()
+
+def list_projinfo_from_source(sourcedir):
+    files = find_buildsystem_files_list(sourcedir)
+
+    result = {'buildsystem_files': []}
+    subprojects = {}
+
+    for f in files:
+        f = f.replace('\\', '/')
+        if f == 'meson.build':
+            interpreter = ProjectInfoInterperter(sourcedir, '')
+            interpreter.analyze()
+            version = None
+            if interpreter.project_version is str:
+                version = interpreter.project_version
+            result.update({'version': version, 'descriptive_name': interpreter.project_name})
+            result['buildsystem_files'].append(f)
+        elif f.startswith('subprojects/'):
+            subproject_id = f.split('/')[1]
+            subproject = subprojects.setdefault(subproject_id, {'buildsystem_files': []})
+            subproject['buildsystem_files'].append(f)
+            if f.count('/') == 2 and f.endswith('meson.build'):
+                interpreter = ProjectInfoInterperter(os.path.join(sourcedir, 'subprojects', subproject_id), '')
+                interpreter.analyze()
+                subproject.update({'name': subproject_id, 'version': interpreter.project_version, 'descriptive_name': interpreter.project_name})
+        else:
+            result['buildsystem_files'].append(f)
+
+    subprojects = [obj for name, obj in subprojects.items()]
+    result['subprojects'] = subprojects
+    print(json.dumps(result))
+
 def run(options):
     datadir = 'meson-private'
     if options.builddir is not None:
         datadir = os.path.join(options.builddir, datadir)
+    if options.builddir.endswith('/meson.build') or options.builddir.endswith('\\meson.build') or options.builddir == 'meson.build':
+        if options.projectinfo:
+            sourcedir = '.' if options.builddir == 'meson.build' else options.builddir[:-11]
+            list_projinfo_from_source(sourcedir)
+            return 0
     if not os.path.isdir(datadir):
         print('Current directory is not a build dir. Please specify it or '
               'change the working directory to it.')
diff --git a/mesonbuild/rewriter.py b/mesonbuild/rewriter.py
index 5da8c8903..37ed7efd6 100644
--- a/mesonbuild/rewriter.py
+++ b/mesonbuild/rewriter.py
@@ -41,7 +41,7 @@ def run(options):
     if options.target is None or options.filename is None:
         sys.exit("Must specify both target and filename.")
     print('This tool is highly experimental, use with care.')
-    rewriter = mesonbuild.astinterpreter.AstInterpreter(options.sourcedir, '')
+    rewriter = mesonbuild.astinterpreter.RewriterInterpreter(options.sourcedir, '')
     try:
         if options.commands[0] == 'add':
             rewriter.add_source(options.target, options.filename)
diff --git a/run_unittests.py b/run_unittests.py
index 8351dadb7..d23918cdc 100755
--- a/run_unittests.py
+++ b/run_unittests.py
@@ -1165,6 +1165,13 @@ class BasePlatformTests(unittest.TestCase):
                                       universal_newlines=True)
         return json.loads(out)
 
+    def introspect_directory(self, directory, args):
+        if isinstance(args, str):
+            args = [args]
+        out = subprocess.check_output(self.mintro_command + args + [directory],
+                                      universal_newlines=True)
+        return json.loads(out)
+
     def assertPathEqual(self, path1, path2):
         '''
         Handles a lot of platform-specific quirks related to paths such as
@@ -2913,6 +2920,33 @@ recommended as it is not supported on some platforms''')
                                                   'target2-id', '@other')
         self.assertEqual('81d46d1@@target2-id@other', target_id)
 
+    def test_introspect_projectinfo_without_configured_build(self):
+        testfile = os.path.join(self.common_test_dir, '36 run program', 'meson.build')
+        res = self.introspect_directory(testfile, '--projectinfo')
+        self.assertEqual(set(res['buildsystem_files']), set(['meson.build']))
+        self.assertEqual(res['version'], None)
+        self.assertEqual(res['descriptive_name'], 'run command')
+        self.assertEqual(res['subprojects'], [])
+
+        testfile = os.path.join(self.common_test_dir, '44 options', 'meson.build')
+        res = self.introspect_directory(testfile, '--projectinfo')
+        self.assertEqual(set(res['buildsystem_files']), set(['meson_options.txt', 'meson.build']))
+        self.assertEqual(res['version'], None)
+        self.assertEqual(res['descriptive_name'], 'options')
+        self.assertEqual(res['subprojects'], [])
+
+        testfile = os.path.join(self.common_test_dir, '47 subproject options', 'meson.build')
+        res = self.introspect_directory(testfile, '--projectinfo')
+        self.assertEqual(set(res['buildsystem_files']), set(['meson_options.txt', 'meson.build']))
+        self.assertEqual(res['version'], None)
+        self.assertEqual(res['descriptive_name'], 'suboptions')
+        self.assertEqual(len(res['subprojects']), 1)
+        subproject_files = set(f.replace('\\', '/') for f in res['subprojects'][0]['buildsystem_files'])
+        self.assertEqual(subproject_files, set(['subprojects/subproject/meson_options.txt', 'subprojects/subproject/meson.build']))
+        self.assertEqual(res['subprojects'][0]['name'], 'subproject')
+        self.assertEqual(res['subprojects'][0]['version'], 'undefined')
+        self.assertEqual(res['subprojects'][0]['descriptive_name'], 'subproject')
+
 
 class FailureTests(BasePlatformTests):
     '''