1# Copyright (c) 2013, 2015-2017 ARM Limited
2# All rights reserved.
3#
4# The license below extends only to copyright in the software and shall
5# not be construed as granting a license to any other intellectual
6# property including but not limited to intellectual property relating
7# to a hardware implementation of the functionality of the software
8# licensed hereunder. You may use the software subject to the license

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33# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
34# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
35# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
36# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
37# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
38# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
39# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
40
41from __future__ import print_function
42import os
43
44import gem5_scons.util
45from m5.util import readCommand
46
47git_style_message = """
48You're missing the gem5 style or commit message hook. These hooks help
49to ensure that your code follows gem5's style rules on git commit.
50This script will now install the hook in your .git/hooks/ directory.
51Press enter to continue, or ctrl-c to abort: """
52
53def install_style_hooks(env):
54 try:
55 gitdir = env.Dir(readCommand(
56 ["git", "rev-parse", "--git-dir"]).strip("\n"))
57 except Exception, e:
58 print("Warning: Failed to find git repo directory: %s" % e)
59 return
60
61 git_hooks = gitdir.Dir("hooks")
62 def hook_exists(hook_name):
63 hook = git_hooks.File(hook_name)
64 return hook.exists()
65
66 def hook_install(hook_name, script):
67 hook = git_hooks.File(hook_name)
68 if hook.exists():
69 print("Warning: Can't install %s, hook already exists." %
70 hook_name)
71 return
72
73 if hook.islink():
74 print("Warning: Removing broken symlink for hook %s." % hook_name)
75 os.unlink(hook.get_abspath())
76
77 if not git_hooks.exists():
78 os.mkdir(git_hooks.get_abspath())
79 git_hooks.clear()
80
81 abs_symlink_hooks = git_hooks.islink() and \
82 os.path.isabs(os.readlink(git_hooks.get_abspath()))

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88 os.path.realpath(script.get_abspath()),
89 os.path.realpath(hook.Dir(".").get_abspath()))
90 else:
91 script_path = script.get_abspath()
92
93 try:
94 os.symlink(script_path, hook.get_abspath())
95 except:
96 print("Error updating git %s hook" % hook_name)
97 raise
98
99 if hook_exists("pre-commit") and hook_exists("commit-msg"):
100 return
101
102 print(git_style_message, end=' ')
103 try:
104 raw_input()
105 except:
106 print("Input exception, exiting scons.\n")
107 sys.exit(1)
108
109 git_style_script = env.root.Dir("util").File("git-pre-commit.py")
110 git_msg_script = env.root.Dir("ext").File("git-commit-msg")
111
112 hook_install("pre-commit", git_style_script)
113 hook_install("commit-msg", git_msg_script)
114
115def generate(env):
116 if exists(env) and not gem5_scons.util.ignore_style():
117 install_style_hooks(env)
118
119def exists(env):
120 return env.Entry('#.git').exists()