cibuild: Match Travis env variable behaviour

Whenever TRAVIS_TAG is non-empty, TRAVIS_BRANCH is over-ridden to match the
TRAVIS_TAG value. Adjust our tests to reflect this, and add a sanity check that
fails hard if this constraint is ever not met.

See https://github.com/travis-ci/travis-ci/issues/4745

release/cibuild.py

@@ -63,6 +63,12 @@ class BuildEnviron:
 
         self.travis_tag = travis_tag
         self.travis_branch = travis_branch
+
+        if travis_tag and travis_tag != travis_branch:
+            raise ValueError(
+                f"Something is wrong - TRAVIS_TAG={travis_tag}, but TRAVIS_BRANCH={travis_branch}"
+            )
+
         self.travis_pull_request = travis_pull_request
 
         self.should_build_wheel = should_build_wheel
@@ -202,7 +208,7 @@ class BuildEnviron:
 
     @property
     def is_prod_release(self) -> bool:
-        if not self.tag:
+        if not (self.tag and self.tag.startswith("v")):
             return False
         try:
             v = parver.Version.parse(self.version, strict=True)

test/release/test_cibuild.py

@@ -36,6 +36,14 @@ def test_buildenviron_common():
     with pytest.raises(cibuild.BuildError):
         be.platform_tag
 
+    with pytest.raises(ValueError, match="TRAVIS_TAG"):
+        be = cibuild.BuildEnviron(
+            system="Linux",
+            root_dir="/foo",
+            travis_tag="one",
+            travis_branch="two",
+        )
+
 
 def test_buildenviron_pr():
     # Simulates a PR. We build everything, but don't have access to secret
@@ -83,7 +91,7 @@ def test_buildenviron_releasetag():
         system="Linux",
         root_dir="/foo",
         travis_tag="v0.0.1",
-        travis_branch="v0.x",
+        travis_branch="v0.0.1",
         should_build_wheel=True,
         should_build_docker=True,
         should_build_pyinstaller=True,
@@ -92,7 +100,7 @@ def test_buildenviron_releasetag():
         docker_password="bar",
     )
     assert be.tag == "v0.0.1"
-    assert be.branch == "v0.x"
+    assert be.branch == "v0.0.1"
     assert be.version == "0.0.1"
     assert be.upload_dir == "0.0.1"
     assert be.docker_tag == "mitmproxy/mitmproxy:0.0.1"
@@ -107,7 +115,7 @@ def test_buildenviron_namedtag():
         system="Linux",
         root_dir="/foo",
         travis_tag="anyname",
-        travis_branch="v0.x",
+        travis_branch="anyname",
         should_build_wheel=True,
         should_build_docker=True,
         should_build_pyinstaller=True,
@@ -116,7 +124,7 @@ def test_buildenviron_namedtag():
         docker_password="bar",
     )
     assert be.tag == "anyname"
-    assert be.branch == "v0.x"
+    assert be.branch == "anyname"
     assert be.version == "anyname"
     assert be.upload_dir == "anyname"
     assert be.docker_tag == "mitmproxy/mitmproxy:anyname"
@@ -152,7 +160,7 @@ def test_buildenviron_osx(tmpdir):
         system="Darwin",
         root_dir="/foo",
         travis_tag="0.0.1",
-        travis_branch="v0.x",
+        travis_branch="0.0.1",
     )
     assert be.platform_tag == "osx"
     assert be.bdists == {
@@ -170,8 +178,8 @@ def test_buildenviron_windows(tmpdir):
     be = cibuild.BuildEnviron(
         system="Windows",
         root_dir="/foo",
-        travis_tag="0.0.1",
+        travis_tag="v0.0.1",
-        travis_branch="v0.x",
+        travis_branch="v0.0.1",
     )
     assert be.platform_tag == "windows"
     assert be.bdists == {
@@ -193,13 +201,15 @@ def test_buildenviron_windows(tmpdir):
     ("3.0.0", "v3.0.0", True),  # regular release
     ("3.0.0.rc1", "v3.0.0.rc1", False),  # non-canonical.
     ("3.0.0.dev", "anyname", True),  # tagged test/dev release
+    ("3.0.0", "3.0.0", False),  # tagged, but without v prefix
 ])
 def test_buildenviron_check_version(version, tag, ok, tmpdir):
     tmpdir.mkdir("mitmproxy").join("version.py").write(f'VERSION = "{version}"')
 
     be = cibuild.BuildEnviron(
         root_dir=tmpdir,
-        travis_tag=tag
+        travis_tag=tag,
+        travis_branch=tag
     )
     if ok:
         be.check_version()