Merge branch 'srcdir' into 'master'

Make it easier for cairo-test-suite to find the source dir

See merge request cairo/cairo!328

test/README

@@ -17,6 +17,11 @@ file, which, when viewed in a web browser makes it quite easy to
 visually see any failed renderings alongside the corresponding
 reference image, (and a diff image as well).
 
+As some browsers do not permit Javascript to read from the local
+filesystem, the view-test-results.py script can used to view the
+results. It starts a http server serving the current directory before
+displaying the test results in a browser.
+
 The test suite needs to be run before any code is committed and before
 any release. See below for hints and rules governing the use of the suite.
 
@@ -36,6 +41,15 @@ CAIRO_TEST_TARGET environment variable, so for instance:
 This binary should be backwards-compatible with all library versions,
 allowing you to compare current versus past behaviour for any test.
 
+The test suite needs to find the "test" directory in the source
+tree. The srcdir environment variable can be used to specify
+the location of this directory. If this environment variable is not
+set, the binary looks for the directory "srcdir" in the current
+directory. The meson build system symlinks "srcdir" in the
+$builddir/test directory to the "test" directory in the source
+tree. If this is not found the binary defaults to the current
+directory.
+
 Tailoring tests running
 -----------------------
 There are some mechanisms to limit the tests run during "make test".

test/cairo-test.c

@@ -196,9 +196,14 @@ _cairo_test_init (cairo_test_context_t *ctx,
 	ctx->own_targets = TRUE;
 
 	ctx->srcdir = getenv ("srcdir");
-	if (ctx->srcdir == NULL)
-	    ctx->srcdir = ".";
-
+	if (ctx->srcdir == NULL) {
+            ctx->srcdir = ".";
+#if HAVE_SYS_STAT_H
+            struct stat st;
+            if (stat ("srcdir", &st) == 0 && (st.st_mode & S_IFDIR))
+                ctx->srcdir = "srcdir";
+#endif
+        }
 	ctx->refdir = getenv ("CAIRO_REF_DIR");
     }
 

test/meson.build

@@ -634,6 +634,13 @@ foreach file : html_files
   configure_file(input: file, output : file, copy: true)
 endforeach
 
+if build_machine.system() != 'windows'
+  run_command('ln', '-sf',
+              meson.current_source_dir(),
+              join_paths(meson.current_build_dir(), 'srcdir'),
+              check: true)
+endif
+
 env = environment()
 
 env.set('srcdir', meson.current_source_dir())