scons: Pull style hook management out of the main SConstruct.

Put the code which supports style hooks for mercurial and git into two
scons "tools".

Change-Id: I3ffed85a177be4f9e458fff7b1cf16a3a479914e
Reviewed-on: https://gem5-review.googlesource.com/5563
Reviewed-by: Gabe Black <gabeblack@google.com>
Maintainer: Gabe Black <gabeblack@google.com>

1 files changed, 0 insertions, 189 deletions

diff --git a/SConstruct b/SConstruct
index 7cf2c9c83..f0a3b655d 100755
--- a/SConstruct
+++ b/SConstruct
@@ -196,195 +196,6 @@ if not ('CC' in main_dict_keys and 'CXX' in main_dict_keys):
 # as well
 main.AppendENVPath('PYTHONPATH', extra_python_paths)
 
-########################################################################
-#
-# Mercurial Stuff.
-#
-# If the gem5 directory is a mercurial repository, we should do some
-# extra things.
-#
-########################################################################
-
-hgdir = main.root.Dir(".hg")
-
-
-style_message = """
-You're missing the gem5 style hook, which automatically checks your code
-against the gem5 style rules on %s.
-This script will now install the hook in your %s.
-Press enter to continue, or ctrl-c to abort: """
-
-mercurial_style_message = """
-You're missing the gem5 style hook, which automatically checks your code
-against the gem5 style rules on hg commit and qrefresh commands.
-This script will now install the hook in your .hg/hgrc file.
-Press enter to continue, or ctrl-c to abort: """
-
-git_style_message = """
-You're missing the gem5 style or commit message hook. These hooks help
-to ensure that your code follows gem5's style rules on git commit.
-This script will now install the hook in your .git/hooks/ directory.
-Press enter to continue, or ctrl-c to abort: """
-
-mercurial_style_upgrade_message = """
-Your Mercurial style hooks are not up-to-date. This script will now
-try to automatically update them. A backup of your hgrc will be saved
-in .hg/hgrc.old.
-Press enter to continue, or ctrl-c to abort: """
-
-mercurial_style_hook = """
-# The following lines were automatically added by gem5/SConstruct
-# to provide the gem5 style-checking hooks
-[extensions]
-hgstyle = %s/util/hgstyle.py
-
-[hooks]
-pretxncommit.style = python:hgstyle.check_style
-pre-qrefresh.style = python:hgstyle.check_style
-# End of SConstruct additions
-
-""" % (main.root.abspath)
-
-mercurial_lib_not_found = """
-Mercurial libraries cannot be found, ignoring style hook.  If
-you are a gem5 developer, please fix this and run the style
-hook. It is important.
-"""
-
-# Check for style hook and prompt for installation if it's not there.
-# Skip this if --ignore-style was specified, there's no interactive
-# terminal to prompt, or no recognized revision control system can be
-# found.
-ignore_style = GetOption('ignore_style') or not sys.stdin.isatty()
-
-# Try wire up Mercurial to the style hooks
-if not ignore_style and hgdir.exists():
-    style_hook = True
-    style_hooks = tuple()
-    hgrc = hgdir.File('hgrc')
-    hgrc_old = hgdir.File('hgrc.old')
-    try:
-        from mercurial import ui
-        ui = ui.ui()
-        ui.readconfig(hgrc.abspath)
-        style_hooks = (ui.config('hooks', 'pretxncommit.style', None),
-                       ui.config('hooks', 'pre-qrefresh.style', None))
-        style_hook = all(style_hooks)
-        style_extension = ui.config('extensions', 'style', None)
-    except ImportError:
-        print mercurial_lib_not_found
-
-    if "python:style.check_style" in style_hooks:
-        # Try to upgrade the style hooks
-        print mercurial_style_upgrade_message
-        # continue unless user does ctrl-c/ctrl-d etc.
-        try:
-            raw_input()
-        except:
-            print "Input exception, exiting scons.\n"
-            sys.exit(1)
-        shutil.copyfile(hgrc.abspath, hgrc_old.abspath)
-        re_style_hook = re.compile(r"^([^=#]+)\.style\s*=\s*([^#\s]+).*")
-        re_style_extension = re.compile("style\s*=\s*([^#\s]+).*")
-        old, new = open(hgrc_old.abspath, 'r'), open(hgrc.abspath, 'w')
-        for l in old:
-            m_hook = re_style_hook.match(l)
-            m_ext = re_style_extension.match(l)
-            if m_hook:
-                hook, check = m_hook.groups()
-                if check != "python:style.check_style":
-                    print "Warning: %s.style is using a non-default " \
-                        "checker: %s" % (hook, check)
-                if hook not in ("pretxncommit", "pre-qrefresh"):
-                    print "Warning: Updating unknown style hook: %s" % hook
-
-                l = "%s.style = python:hgstyle.check_style\n" % hook
-            elif m_ext and m_ext.group(1) == style_extension:
-                l = "hgstyle = %s/util/hgstyle.py\n" % main.root.abspath
-
-            new.write(l)
-    elif not style_hook:
-        print mercurial_style_message,
-        # continue unless user does ctrl-c/ctrl-d etc.
-        try:
-            raw_input()
-        except:
-            print "Input exception, exiting scons.\n"
-            sys.exit(1)
-        hgrc_path = '%s/.hg/hgrc' % main.root.abspath
-        print "Adding style hook to", hgrc_path, "\n"
-        try:
-            with open(hgrc_path, 'a') as f:
-                f.write(mercurial_style_hook)
-        except:
-            print "Error updating", hgrc_path
-            sys.exit(1)
-
-def install_git_style_hooks():
-    try:
-        gitdir = Dir(readCommand(
-            ["git", "rev-parse", "--git-dir"]).strip("\n"))
-    except Exception, e:
-        print "Warning: Failed to find git repo directory: %s" % e
-        return
-
-    git_hooks = gitdir.Dir("hooks")
-    def hook_exists(hook_name):
-        hook = git_hooks.File(hook_name)
-        return hook.exists()
-
-    def hook_install(hook_name, script):
-        hook = git_hooks.File(hook_name)
-        if hook.exists():
-            print "Warning: Can't install %s, hook already exists." % hook_name
-            return
-
-        if hook.islink():
-            print "Warning: Removing broken symlink for hook %s." % hook_name
-            os.unlink(hook.get_abspath())
-
-        if not git_hooks.exists():
-            mkdir(git_hooks.get_abspath())
-            git_hooks.clear()
-
-        abs_symlink_hooks = git_hooks.islink() and \
-            os.path.isabs(os.readlink(git_hooks.get_abspath()))
-
-        # Use a relative symlink if the hooks live in the source directory,
-        # and the hooks directory is not a symlink to an absolute path.
-        if hook.is_under(main.root) and not abs_symlink_hooks:
-            script_path = os.path.relpath(
-                os.path.realpath(script.get_abspath()),
-                os.path.realpath(hook.Dir(".").get_abspath()))
-        else:
-            script_path = script.get_abspath()
-
-        try:
-            os.symlink(script_path, hook.get_abspath())
-        except:
-            print "Error updating git %s hook" % hook_name
-            raise
-
-    if hook_exists("pre-commit") and hook_exists("commit-msg"):
-        return
-
-    print git_style_message,
-    try:
-        raw_input()
-    except:
-        print "Input exception, exiting scons.\n"
-        sys.exit(1)
-
-    git_style_script = File("util/git-pre-commit.py")
-    git_msg_script = File("ext/git-commit-msg")
-
-    hook_install("pre-commit", git_style_script)
-    hook_install("commit-msg", git_msg_script)
-
-# Try to wire up git to the style hooks
-if not ignore_style and main.root.Entry(".git").exists():
-    install_git_style_hooks()
-
 ###################################################
 #
 # Figure out which configurations to set up based on the path(s) of