Fix tests for non-dev environment (#860)

Create a temporary Git repo to run tests in.

(cherry picked from commit 837a4c4)

test/utilities.jl

@@ -135,18 +135,35 @@ end
  @test endswith(filepath, expected_filepath)
  @show filepath expected_filepath
  end
- commit = Documenter.Utilities.repo_commit(filepath)
-
- @test Documenter.Utilities.url("//blob/{commit}{path}#{line}", filepath) == "//blob/$(commit)/src/Utilities/Utilities.jl#"
- @test Documenter.Utilities.url(nothing, "//blob/{commit}{path}#{line}", Documenter.Utilities, filepath, 10:20) == "//blob/$(commit)/src/Utilities/Utilities.jl#L10-L20"
-
- # repo_root & relpath_from_repo_root
- @test Documenter.Utilities.repo_root(@__FILE__) == dirname(abspath(joinpath(@__DIR__, ".."))) # abspath() keeps trailing /, hence dirname()
- @test Documenter.Utilities.repo_root(@__FILE__; dbdir=".svn") == nothing
- @test Documenter.Utilities.relpath_from_repo_root(@__FILE__) == joinpath("test", "utilities.jl")
- # We assume that a temporary file is not in a repo
- @test Documenter.Utilities.repo_root(tempname()) == nothing
- @test Documenter.Utilities.relpath_from_repo_root(tempname()) == nothing
+
+ mktempdir() do path
+ cd(path) do
+ # Create a simple mock repo in a temporary directory with a single file.
+ @test success(`git init`)
+ @test success(`git config user.email "tester@example.com"`)
+ @test success(`git config user.name "Test Committer"`)
+ @test success(`git remote add origin git@github.com:JuliaDocs/Documenter.jl.git`)
+ mkpath("src")
+ filepath = abspath(joinpath("src", "SourceFile.jl"))
+ write(filepath, "X")
+ @test success(`git add -A`)
+ @test success(`git commit -m"Initial commit."`)
+
+ # Run tests
+ commit = Documenter.Utilities.repo_commit(filepath)
+
+ @test Documenter.Utilities.url("//blob/{commit}{path}#{line}", filepath) == "//blob/$(commit)/src/SourceFile.jl#"
+ @test Documenter.Utilities.url(nothing, "//blob/{commit}{path}#{line}", Documenter.Utilities, filepath, 10:20) == "//blob/$(commit)/src/SourceFile.jl#L10-L20"
+
+ # repo_root & relpath_from_repo_root
+ @test Documenter.Utilities.repo_root(filepath) == dirname(abspath(joinpath(dirname(filepath), ".."))) # abspath() keeps trailing /, hence dirname()
+ @test Documenter.Utilities.repo_root(filepath; dbdir=".svn") == nothing
+ @test Documenter.Utilities.relpath_from_repo_root(filepath) == joinpath("src", "SourceFile.jl")
+ # We assume that a temporary file is not in a repo
+ @test Documenter.Utilities.repo_root(tempname()) == nothing
+ @test Documenter.Utilities.relpath_from_repo_root(tempname()) == nothing
+ end
+ end
 
  import Documenter.Documents: Document, Page, Globals
  let page = Page("source", "build", [], IdDict(), Globals()), doc = Document()