From patchwork Fri Oct  8 09:59:51 2021
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Subject: D11618: rust: Make the hg-cpython crate default to Python 3
From: phabricator <phabricator@mercurial-scm.org>
X-Patchwork-Id: 49942
Message-Id: <differential-rev-PHID-DREV-mjj65cirw7oimuzx5lp6-req@mercurial-scm.org>
To: Phabricator <phabricator@mercurial-scm.org>
Cc: mercurial-devel@mercurial-scm.org
Date: Fri, 8 Oct 2021 09:59:51 +0000

SimonSapin created this revision.
Herald added a reviewer: hg-reviewers.
Herald added a subscriber: mercurial-patches.

REVISION SUMMARY
  This default is used when running `cargo` manually such as for `cargo test`.
  `setup.py` and `Makefile` both configure the Python major version explicitly.

REPOSITORY
  rHG Mercurial

BRANCH
  default

REVISION DETAIL
  https://phab.mercurial-scm.org/D11618

AFFECTED FILES
  rust/hg-cpython/Cargo.toml
  setup.py

CHANGE DETAILS




To: SimonSapin, #hg-reviewers
Cc: mercurial-patches, mercurial-devel

diff --git a/setup.py b/setup.py
--- a/setup.py
+++ b/setup.py
@@ -1428,12 +1428,9 @@
 
     rusttargetdir = os.path.join('rust', 'target', 'release')
 
-    def __init__(
-        self, mpath, sources, rustlibname, subcrate, py3_features=None, **kw
-    ):
+    def __init__(self, mpath, sources, rustlibname, subcrate, **kw):
         Extension.__init__(self, mpath, sources, **kw)
         srcdir = self.rustsrcdir = os.path.join('rust', subcrate)
-        self.py3_features = py3_features
 
         # adding Rust source and control files to depends so that the extension
         # gets rebuilt if they've changed
@@ -1481,9 +1478,11 @@
 
         feature_flags = []
 
-        if sys.version_info[0] == 3 and self.py3_features is not None:
-            feature_flags.append(self.py3_features)
-            cargocmd.append('--no-default-features')
+        cargocmd.append('--no-default-features')
+        if sys.version_info[0] == 2:
+            feature_flags.append('python27')
+        elif sys.version_info[0] == 3:
+            feature_flags.append('python3')
 
         rust_features = env.get("HG_RUST_FEATURES")
         if rust_features:
@@ -1605,7 +1604,9 @@
         extra_compile_args=common_cflags,
     ),
     RustStandaloneExtension(
-        'mercurial.rustext', 'hg-cpython', 'librusthg', py3_features='python3'
+        'mercurial.rustext',
+        'hg-cpython',
+        'librusthg',
     ),
 ]
 
diff --git a/rust/hg-cpython/Cargo.toml b/rust/hg-cpython/Cargo.toml
--- a/rust/hg-cpython/Cargo.toml
+++ b/rust/hg-cpython/Cargo.toml
@@ -9,7 +9,7 @@
 crate-type = ["cdylib"]
 
 [features]
-default = ["python27"]
+default = ["python3"]
 
 # Features to build an extension module:
 python27 = ["cpython/python27-sys", "cpython/extension-module-2-7"]