From patchwork Fri Mar  6 13:46:26 2020
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Subject: D8248: debuginstall: print if Rust extensions are installed
From: phabricator <phabricator@mercurial-scm.org>
X-Patchwork-Id: 45549
Message-Id: <differential-rev-PHID-DREV-fb7e2dop5l75hsohdx6z-req@mercurial-scm.org>
To: Phabricator <phabricator@mercurial-scm.org>
Cc: mercurial-devel@mercurial-scm.org
Date: Fri, 6 Mar 2020 13:46:26 +0000

Alphare created this revision.
Herald added a subscriber: mercurial-devel.
Herald added a reviewer: hg-reviewers.

REVISION SUMMARY
  This should make it easier to use the Rust extensions.
  
  Another patch on will be exposing a version and more useful information, but
  it can only be done on top of this very patch, since it is targeting the stable
  branch and the API has already changed on the default branch.

REPOSITORY
  rHG Mercurial

BRANCH
  stable

REVISION DETAIL
  https://phab.mercurial-scm.org/D8248

AFFECTED FILES
  mercurial/debugcommands.py
  rust/hg-cpython/src/lib.rs

CHANGE DETAILS




To: Alphare, #hg-reviewers
Cc: mercurial-devel

diff --git a/rust/hg-cpython/src/lib.rs b/rust/hg-cpython/src/lib.rs
--- a/rust/hg-cpython/src/lib.rs
+++ b/rust/hg-cpython/src/lib.rs
@@ -72,6 +72,12 @@
         "PatternError",
         py.get_type::<exceptions::PatternError>(),
     )?;
+    /// Change this version whenever the API is changed
+    m.add(
+        py,
+        "version",
+        0,
+    )?;
     Ok(())
 });
 
diff --git a/mercurial/debugcommands.py b/mercurial/debugcommands.py
--- a/mercurial/debugcommands.py
+++ b/mercurial/debugcommands.py
@@ -1497,6 +1497,18 @@
         pythonlib or _(b"unknown"),
     )
 
+    try:
+        from mercurial import rustext
+        rustext.__doc__  # trigger lazy import
+    except ImportError:
+        rustext = None
+
+    fm.write(
+        b'',
+        _(b"checking Rust extensions (%s)\n"),
+        b'missing' if rustext is None else 'installed',
+    )
+
     security = set(sslutil.supportedprotocols)
     if sslutil.hassni:
         security.add(b'sni')