scons: Create a small helper function for disecting a build target path.
This function does about half of the work of the loop which determines
the build root and the list of variants.
Change-Id: I4f44d1e2643244a4be889c677b25b83d41a39b19
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/40970
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Gabe Black <gabe.black@gmail.com>
Maintainer: Gabe Black <gabe.black@gmail.com>
diff --git a/SConstruct b/SConstruct
index b63e2cc..beaf9ae 100755
--- a/SConstruct
+++ b/SConstruct
@@ -124,7 +124,7 @@
help='Build systemc tests')
from gem5_scons import Transform, error, warning, summarize_warnings
-from gem5_scons import TempFileSpawn
+from gem5_scons import TempFileSpawn, parse_build_path
import gem5_scons
########################################################################
@@ -182,24 +182,20 @@
# Generate a list of the unique build roots and configs that the
# collected targets reference.
-variant_paths = []
+variant_paths = set()
build_root = None
for t in BUILD_TARGETS:
- path_dirs = t.split('/')
- try:
- build_top = rfind(path_dirs, 'build', -2)
- except:
- error("No non-leaf 'build' dir found on target path.", t)
- this_build_root = joinpath('/',*path_dirs[:build_top+1])
+ this_build_root, variant = parse_build_path(t)
+
+ # Make sure all targets use the same build root.
if not build_root:
build_root = this_build_root
- else:
- if this_build_root != build_root:
- error("build targets not under same build root\n"
- " %s\n %s" % (build_root, this_build_root))
- variant_path = joinpath('/',*path_dirs[:build_top+2])
- if variant_path not in variant_paths:
- variant_paths.append(variant_path)
+ elif this_build_root != build_root:
+ error("build targets not under same build root\n %s\n %s" %
+ (build_root, this_build_root))
+
+ # Collect all the variants into a set.
+ variant_paths.add(os.path.join('/', build_root, variant))
# Make sure build_root exists (might not if this is the first build there)
if not isdir(build_root):
diff --git a/site_scons/gem5_scons/__init__.py b/site_scons/gem5_scons/__init__.py
index 5b5777c..6b167af 100644
--- a/site_scons/gem5_scons/__init__.py
+++ b/site_scons/gem5_scons/__init__.py
@@ -221,4 +221,20 @@
print_message('Error: ', termcap.Red, message, **kwargs)
SCons.Script.Exit(1)
-__all__ = ['Configure', 'Transform', 'warning', 'error']
+def parse_build_path(target):
+ path_dirs = target.split('/')
+
+ # Pop off the target file.
+ path_dirs.pop()
+
+ # Search backwards for the "build" directory. Whatever was just before it
+ # was the name of the variant.
+ variant_dir = path_dirs.pop()
+ while path_dirs and path_dirs[-1] != 'build':
+ variant_dir = path_dirs.pop()
+ if not path_dirs:
+ error("No non-leaf 'build' dir found on target path.", t)
+
+ return os.path.join('/', *path_dirs), variant_dir
+
+__all__ = ['Configure', 'Transform', 'warning', 'error', 'parse_build_dir']
