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credo
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A static code analysis tool with a focus on code consistency and teaching.
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Files
lib/credo/build_info.ex
defmodule Credo.BuildInfo do
@moduledoc false
# This is called at compile-time and should not be used at runtime!
@doc false
def version(mix_version) do
version(mix_version, git_info())
end
defp version(mix_version, nil) do
mix_version
end
defp version(mix_version, git_info) do
version =
if git_info.tag == "v#{mix_version}" do
mix_version
else
branch = git_info.branch || "nobranch"
commit = git_info.commit || "nocommit"
"#{mix_version}-ref.#{branch}.#{commit}"
end
if git_info.dirty? do
"#{version}+uncommittedchanges"
else
version
end
end
defp git_info do
if in_git_work_tree?() do
%{
commit: git_commit(),
branch: git_branch(),
tag: git_tag(),
dirty?: git_dirty?()
}
end
end
defp in_git_work_tree? do
{_, exit_status} =
System.cmd("git", ["rev-parse", "--is-inside-work-tree"], stderr_to_stdout: true)
exit_status == 0
rescue
_ -> false
end
defp git_branch do
case System.cmd("git", ["branch"]) do
{output, 0} -> git_branch(output)
{_, _} -> nil
end
end
defp git_branch(output) do
line_with_active_branch =
output
|> String.split("\n")
|> Enum.find(fn
"* " <> _ -> true
_ -> false
end)
case line_with_active_branch do
"* (HEAD detached at origin/" <> remote_branch_name ->
String.replace(remote_branch_name, ~r/\)$/, "")
"* (HEAD detached at " <> branch_name ->
String.replace(branch_name, ~r/\)$/, "")
"* " <> branch_name ->
branch_name
_ ->
nil
end
end
defp git_commit do
case System.cmd("git", ["rev-parse", "--short", "HEAD"]) do
{output, 0} -> String.trim(output)
{_, _} -> nil
end
end
defp git_tag do
case System.cmd("git", ["tag", "--points-at", "HEAD"]) do
{output, 0} -> String.trim(output)
{_, _} -> nil
end
end
defp git_dirty? do
case System.cmd("git", ["status", "--short"]) do
{output, 0} -> output |> String.trim() |> git_dirty?()
{_, _} -> nil
end
end
defp git_dirty?(""), do: false
# Hex puts a `.fetch` file in the working dir when downloading deps via git
defp git_dirty?("?? .fetch"), do: false
defp git_dirty?(_), do: true
end