From b322b80225f6bf06190cd8d7b86e6c05a69ba022 Mon Sep 17 00:00:00 2001
From: Catherine <whitequark@whitequark.org>
Date: Tue, 19 Mar 2024 00:33:19 +0000
Subject: [PATCH] pyproject: use `.dev{distance}`, not `+{node}`, for
 non-release builds.

At the moment this uses a git URL for pdm-backend because required PDM
functionality (pdm-project/pdm-backend#217) is not released yet.
---
 .github/workflows/main.yaml |  4 +++-
 pdm_build.py                | 19 ++++++++++++++++---
 pyproject.toml              |  3 ++-
 3 files changed, 21 insertions(+), 5 deletions(-)

diff --git a/.github/workflows/main.yaml b/.github/workflows/main.yaml
index 93909fbef..2f9994ea0 100644
--- a/.github/workflows/main.yaml
+++ b/.github/workflows/main.yaml
@@ -132,6 +132,8 @@ jobs:
     steps:
       - name: Check out source code
         uses: actions/checkout@v4
+        with:
+            fetch-depth: 0
       - name: Set up PDM
         uses: pdm-project/setup-pdm@v4
         with:
@@ -260,4 +262,4 @@ jobs:
         GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
       with:
         tag_name: ${{ github.ref_name }}
-        release_name: ${{ steps.metadata.outputs.name }}
\ No newline at end of file
+        release_name: ${{ steps.metadata.outputs.name }}
diff --git a/pdm_build.py b/pdm_build.py
index bd0a54b35..3ad2682e4 100644
--- a/pdm_build.py
+++ b/pdm_build.py
@@ -1,11 +1,24 @@
+import os
+from datetime import datetime
+from pdm.backend.hooks.version import SCMVersion
 from pdm.backend._vendor.packaging.version import Version
 
 
-# This is done in a PDM build hook without specifying `dynamic = [..., "version"]` to put all
-# of the static metadata into pyproject.toml. Tools other than PDM will not execute this script
-# and will use the generic version of the documentation URL (which redirects to /latest).
+def format_version(version: SCMVersion) -> str:
+    major, minor, patch = (int(n) for n in str(version.version).split(".")[:3])
+    dirty = f"+{datetime.utcnow():%Y%m%d.%H%M%S}" if version.dirty else ""
+    if version.distance is None:
+        return f"{major}.{minor}.{patch}{dirty}"
+    else:
+        return f"{major}.{minor}.{patch}.dev{version.distance}{dirty}"
+
+
 def pdm_build_initialize(context):
     version = Version(context.config.metadata["version"])
+
+    # This is done in a PDM build hook without specifying `dynamic = [..., "version"]` to put all
+    # of the static metadata into pyproject.toml. Tools other than PDM will not execute this script
+    # and will use the generic version of the documentation URL (which redirects to /latest).
     if version.is_prerelease:
         url_version = "latest"
     else:
diff --git a/pyproject.toml b/pyproject.toml
index 9e25f5010..599740ffe 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -2,6 +2,7 @@
 
 [tool.pdm.version]
 source = "scm"
+version_format = "pdm_build:format_version"
 
 [project]
 dynamic = ["version"]
@@ -39,7 +40,7 @@ amaranth-rpc = "amaranth.rpc:main"
 # Build system configuration
 
 [build-system]
-requires = ["pdm-backend"]
+requires = ["pdm-backend @ git+https://github.com/pdm-project/pdm-backend@885bc8d9b75d068a34b2df86c6324c5fdf5c0cc8"]
 build-backend = "pdm.backend"
 
 [tool.pdm]