Move git helper out into mesonlib for reuse

Reuse the git helper for `meson wrap` and `meson subprojects` so we
don't need to maintain the same git-colors-on-windows workarounds in
multiple places.

mesonbuild/mesonlib.py

@@ -56,6 +56,20 @@ else:
     python_command = [sys.executable]
 meson_command = None
 
+GIT = shutil.which('git')
+def git(cmd: T.List[str], workingdir: str, **kwargs) -> subprocess.CompletedProcess:
+    pc = subprocess.run([GIT, '-C', workingdir] + cmd,
+                        # Redirect stdin to DEVNULL otherwise git messes up the
+                        # console and ANSI colors stop working on Windows.
+                        stdin=subprocess.DEVNULL, **kwargs)
+    # Sometimes git calls git recursively, such as `git submodule update
+    # --recursive` which will be without the above workaround, so set the
+    # console mode again just in case.
+    if platform.system().lower() == 'windows':
+        mlog._windows_ansi()
+    return pc
+
+
 def set_meson_command(mainfile):
     global python_command
     global meson_command

mesonbuild/msubprojects.py

@@ -2,7 +2,7 @@ import os, subprocess
 import argparse
 
 from . import mlog
-from .mesonlib import Popen_safe
+from .mesonlib import git, Popen_safe
 from .wrap.wrap import API_ROOT, PackageDefinition, Resolver, WrapException
 from .wrap import wraptool
 
@@ -40,12 +40,8 @@ def update_file(wrap, repo_dir, options):
                  '     In that case, delete', mlog.bold(repo_dir), 'and run', mlog.bold('meson --reconfigure'))
 
 def git_output(cmd, workingdir):
-    return subprocess.check_output(['git', '-C', workingdir] + cmd,
-                                   # Redirect stdin to DEVNULL otherwise git
-                                   # messes up the console and ANSI colors stop
-                                   # working on Windows.
-                                   stdin=subprocess.DEVNULL,
-                                   stderr=subprocess.STDOUT).decode()
+    return git(cmd, workingdir, check=True, universal_newlines=True,
+               stdout=subprocess.PIPE, stderr=subprocess.STDOUT).stdout
 
 def git_show(repo_dir):
     commit_message = git_output(['show', '--quiet', '--pretty=format:%h%n%d%n%s%n[%an]'], repo_dir)

mesonbuild/wrap/wrap.py

@@ -18,7 +18,6 @@ import urllib.request
 import urllib.error
 import urllib.parse
 import os
-import platform
 import hashlib
 import shutil
 import tempfile
@@ -29,7 +28,7 @@ import configparser
 import typing as T
 
 from . import WrapMode
-from ..mesonlib import ProgressBar, MesonException
+from ..mesonlib import git, GIT, ProgressBar, MesonException
 
 if T.TYPE_CHECKING:
     import http.client
@@ -44,23 +43,10 @@ except ImportError:
     has_ssl = False
     API_ROOT = 'http://wrapdb.mesonbuild.com/v1/'
 
-GIT = shutil.which('git')
 REQ_TIMEOUT = 600.0
 SSL_WARNING_PRINTED = False
 WHITELIST_SUBDOMAIN = 'wrapdb.mesonbuild.com'
 
-def git(cmd: T.List[str], workingdir: str, **kwargs) -> subprocess.CompletedProcess:
-    pc = subprocess.run([GIT, '-C', workingdir] + cmd,
-                        # Redirect stdin to DEVNULL otherwise git messes up the
-                        # console and ANSI colors stop working on Windows.
-                        stdin=subprocess.DEVNULL, **kwargs)
-    # Sometimes git calls git recursively, such as `git submodule update
-    # --recursive` which will be without the above workaround, so set the
-    # console mode again just in case.
-    if platform.system().lower() == 'windows':
-        mlog._windows_ansi()
-    return pc
-
 def quiet_git(cmd: T.List[str], workingdir: str) -> T.Tuple[bool, str]:
     if not GIT:
         return False, 'Git program not found.'