-
Notifications
You must be signed in to change notification settings - Fork 413
/
get_git_diff.ex
258 lines (213 loc) · 7.18 KB
/
get_git_diff.ex
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
defmodule Credo.CLI.Command.Diff.Task.GetGitDiff do
use Credo.Execution.Task
alias Credo.CLI.Command.Diff.DiffCommand
alias Credo.CLI.Output.Shell
alias Credo.CLI.Output.UI
def call(exec, _opts) do
case Execution.get_assign(exec, "credo.diff.previous_exec") do
%Execution{} -> exec
_ -> run_credo_and_store_resulting_execution(exec)
end
end
def error(exec, _opts) do
exec
|> Execution.get_halt_message()
|> puts_error_message()
exec
end
defp puts_error_message(halt_message) do
UI.warn([:red, "** (diff) ", halt_message])
UI.warn("")
end
defp run_credo_and_store_resulting_execution(exec) do
case DiffCommand.previous_ref(exec) do
{:git, git_ref} ->
run_credo_on_git_ref(exec, git_ref, {:git, git_ref})
{:git_merge_base, git_merge_base} ->
run_credo_on_git_merge_base(exec, git_merge_base, {:git_merge_base, git_merge_base})
{:git_datetime, datetime} ->
run_credo_on_datetime(exec, datetime, {:git_datetime, datetime})
{:path, path} ->
run_credo_on_path_ref(exec, path, {:path, path})
{:error, error} ->
Execution.halt(exec, error)
end
end
defp run_credo_on_git_ref(exec, git_ref, given_ref) do
working_dir = Execution.working_dir(exec)
previous_dirname = run_git_clone_and_checkout(working_dir, git_ref)
run_credo_on_dir(exec, previous_dirname, git_ref, given_ref)
end
defp run_credo_on_git_merge_base(exec, git_merge_base, given_ref) do
# git merge-base master HEAD
case System.cmd("git", ["merge-base", git_merge_base, "HEAD"], stderr_to_stdout: true) do
{output, 0} ->
git_ref = String.trim(output)
working_dir = Execution.working_dir(exec)
previous_dirname = run_git_clone_and_checkout(working_dir, git_ref)
run_credo_on_dir(exec, previous_dirname, git_ref, given_ref)
{output, _} ->
Execution.halt(
exec,
"Could not determine merge base for `#{git_merge_base}`: #{inspect(output)}"
)
end
end
defp run_credo_on_datetime(exec, datetime, given_ref) do
git_ref =
case get_git_ref_for_datetime(datetime) do
nil -> "HEAD"
git_ref -> git_ref
end
working_dir = Execution.working_dir(exec)
previous_dirname = run_git_clone_and_checkout(working_dir, git_ref)
run_credo_on_dir(exec, previous_dirname, git_ref, given_ref)
end
defp get_git_ref_for_datetime(datetime) do
case System.cmd("git", ["rev-list", "--reverse", "--after", datetime, "HEAD"]) do
{"", 0} ->
nil
{output, 0} ->
output
|> String.split(~r/\n/)
|> List.first()
_ ->
nil
end
end
defp run_credo_on_path_ref(exec, path, given_ref) do
run_credo_on_dir(exec, path, path, given_ref)
end
defp run_credo_on_dir(exec, dirname, previous_git_ref, given_ref) do
{previous_argv, _last_arg} =
exec.argv
|> Enum.slice(1..-1)
|> Enum.reduce({[], nil}, fn
_, {argv, "--working-dir"} -> {Enum.slice(argv, 1..-2), nil}
_, {argv, "--from-git-merge-base"} -> {Enum.slice(argv, 1..-2), nil}
_, {argv, "--from-git-ref"} -> {Enum.slice(argv, 1..-2), nil}
_, {argv, "--from-dir"} -> {Enum.slice(argv, 1..-2), nil}
_, {argv, "--since"} -> {Enum.slice(argv, 1..-2), nil}
"--show-fixed", {argv, _last_arg} -> {argv, nil}
"--show-kept", {argv, _last_arg} -> {argv, nil}
^previous_git_ref, {argv, _last_arg} -> {argv, nil}
arg, {argv, _last_arg} -> {argv ++ [arg], arg}
end)
run_credo(exec, previous_git_ref, dirname, previous_argv, given_ref)
end
defp run_credo(exec, previous_git_ref, previous_dirname, previous_argv, given_ref) do
parent_pid = self()
spawn(fn ->
Shell.suppress_output(fn ->
argv = previous_argv ++ ["--working-dir", previous_dirname]
previous_exec = Credo.run(argv)
send(parent_pid, {:previous_exec, previous_exec})
end)
end)
receive do
{:previous_exec, previous_exec} ->
store_resulting_execution(
exec,
previous_git_ref,
previous_dirname,
previous_exec,
given_ref
)
end
end
def store_resulting_execution(
%Execution{debug: true} = exec,
previous_git_ref,
previous_dirname,
previous_exec,
given_ref
) do
exec =
perform_store_resulting_execution(
exec,
previous_git_ref,
previous_dirname,
previous_exec,
given_ref
)
previous_dirname = Execution.get_assign(exec, "credo.diff.previous_dirname")
require Logger
Logger.debug("Git ref checked out to: #{previous_dirname}")
exec
end
def store_resulting_execution(
exec,
previous_git_ref,
previous_dirname,
previous_exec,
given_ref
) do
perform_store_resulting_execution(
exec,
previous_git_ref,
previous_dirname,
previous_exec,
given_ref
)
end
defp perform_store_resulting_execution(
exec,
previous_git_ref,
previous_dirname,
previous_exec,
given_ref
) do
if previous_exec.halted do
halt_execution(exec, previous_git_ref, previous_dirname, previous_exec)
else
exec
|> Execution.put_assign("credo.diff.given_ref", given_ref)
|> Execution.put_assign("credo.diff.previous_git_ref", previous_git_ref)
|> Execution.put_assign("credo.diff.previous_dirname", previous_dirname)
|> Execution.put_assign("credo.diff.previous_exec", previous_exec)
end
end
defp halt_execution(exec, previous_git_ref, previous_dirname, previous_exec) do
message =
case Execution.get_halt_message(previous_exec) do
{:config_name_not_found, message} -> message
halt_message -> inspect(halt_message)
end
Execution.halt(
exec,
[
:bright,
"Running Credo on `#{previous_git_ref}` (checked out to #{previous_dirname}) resulted in the following error:\n\n",
:faint,
message
]
)
end
defp run_git_clone_and_checkout(working_dir, git_ref) do
now = DateTime.utc_now() |> to_string |> String.replace(~r/\D/, "")
tmp_clone_dir = Path.join(System.tmp_dir!(), "credo-diff-#{now}")
git_root_path = git_root_path(working_dir)
current_dir = working_dir
tmp_working_dir = tmp_working_dir(tmp_clone_dir, git_root_path, current_dir)
{_output, 0} =
System.cmd("git", ["clone", git_root_path, tmp_clone_dir],
cd: working_dir,
stderr_to_stdout: true
)
{_output, 0} =
System.cmd("git", ["checkout", git_ref], cd: tmp_clone_dir, stderr_to_stdout: true)
tmp_working_dir
end
defp git_root_path(path) do
{output, 0} =
System.cmd("git", ["rev-parse", "--show-toplevel"], cd: path, stderr_to_stdout: true)
String.trim(output)
end
defp tmp_working_dir(tmp_clone_dir, git_root_is_current_dir, git_root_is_current_dir) do
tmp_clone_dir
end
defp tmp_working_dir(tmp_clone_dir, git_root_path, current_dir) do
subdir_to_run_credo_in = Path.relative_to(current_dir, git_root_path)
Path.join(tmp_clone_dir, subdir_to_run_credo_in)
end
end