[build] Allow for generation of all release information

Allow for automatic generation of the release name, release title, and
release notes (derived from the relevant section of the changelog).

Signed-off-by: Michael Brown <mcb30@ipxe.org>

.github/workflows/build.yml

@@ -509,6 +509,37 @@ jobs:
           path: |
             ipxeboot.tar.gz
 
+  version:
+    name: Version
+    runs-on: ubuntu-latest
+    container:
+      image: ghcr.io/ipxe/ipxe-builder-utils
+    env:
+      bindir: bin
+    steps:
+
+      - name: Check out code
+        uses: actions/checkout@v6
+
+      - name: Build
+        working-directory: src
+        run: |
+          make ${{ env.bindir }}/version.txt \
+               ${{ env.bindir }}/relname.txt \
+               ${{ env.bindir }}/reltitle.txt \
+               ${{ env.bindir }}/relnotes.md
+
+      - name: Upload
+        uses: actions/upload-artifact@v6
+        with:
+          name: version
+          if-no-files-found: error
+          path: |
+            src/${{ env.bindir }}/version.txt
+            src/${{ env.bindir }}/relname.txt
+            src/${{ env.bindir }}/reltitle.txt
+            src/${{ env.bindir }}/relnotes.md
+
   publish:
     name: Publish
     runs-on: ubuntu-latest
@@ -521,6 +552,7 @@ jobs:
       - shim
       - combine
       - netboot
+      - version
     if: >-
       github.ref == 'refs/heads/master' &&
       vars.PAGES_REPO_NAME

RELNOTES.tmpl.md

@@ -0,0 +1,23 @@
+Downloads
+=========
+
+Binaries
+--------
+
+  - [ipxe.iso][iso] (Bootable ISO image)
+  - [ipxe.usb][usb] (Bootable USB or SD card image)
+  - [ipxeboot.tar.gz][netboot] (Network boot server files)
+
+[iso]: ${BINURL}/ipxe.iso
+[usb]: ${BINURL}/ipxe.usb
+[netboot]: ${BINURL}/ipxeboot.tar.gz
+
+Source code
+-----------
+
+  - [${SRCNAME}.tar.gz][tarball]
+
+[tarball]: ${SRCURL}.tar.gz
+
+Changes
+-------

src/Makefile

@@ -57,6 +57,8 @@ GENKEYMAP	:= ./util/genkeymap.py
 DOXYGEN		:= doxygen
 LCAB		:= lcab
 QEMUIMG		:= qemu-img
+PANDOC		:= pandoc
+ENVSUBST	:= envsubst
 
 ###############################################################################
 #

src/Makefile.housekeeping

@@ -1094,11 +1094,6 @@ $(BIN)/NIC : $(AUTO_DEPS)
 	@perl -ne 'chomp; print "$$1\n" if /\# NIC\t(.*)$$/' $^ >> $@
 CLEANUP		+= $(BIN)/NIC	# Doesn't match the $(BIN)/*.* pattern
 
-# Generate version number record
-#
-$(BIN)/version.txt : $(MAKEDEPS)
-	@$(ECHO) "$(VERSION)" > $@
-
 # Analyse a target name (e.g. "bin/dfe538--prism2_pci.rom.tmp") and
 # derive the variables:
 # 
@@ -1616,6 +1611,69 @@ $(BIN)/%.bxs : $(BIN)/%.tmp
 
 endif # defined(BIN)
 
+###############################################################################
+#
+# Versioning
+#
+
+ifdef BIN
+
+REPOURL		:= https://github.com/ipxe/ipxe
+ifeq ($(EXTRAVERSION),)
+RELNAME		:= v$(firstword $(VERSION))
+CLMARKER	:= [$(RELNAME)]
+SRCNAME		:= ipxe-$(firstword $(VERSION))
+SRCURL		:= $(REPOURL)/archive/$(RELNAME)
+BINURL		:= $(REPOURL)/releases/download/$(RELNAME)
+else
+RELNAME		:=
+CLMARKER	:= [Unreleased]
+SRCNAME		:= ipxe
+SRCURL		:= $(REPOURL)/archive/$(GITVERSION)
+BINURL		:= https://boot.ipxe.org
+endif
+
+# Generate version number record
+#
+$(BIN)/version.txt : $(MAKEDEPS)
+	$(QM)$(ECHO) "  [VERSION] $@"
+	$(Q)$(ECHO) "$(VERSION)" > $@
+
+# Generate release name
+#
+$(BIN)/relname.txt : $(MAKEDEPS)
+	$(QM)$(ECHO) "  [RELNAME] $@"
+	$(Q)$(ECHO) "$(RELNAME)" > $@
+
+# Generate changelog section
+#
+$(BIN)/changes.md : ../CHANGELOG.md $(MAKEDEPS)
+	$(QM)$(ECHO) "  [CHANGES] $@"
+	$(Q)$(PANDOC) -f gfm -t gfm --columns 10000 $< | \
+	    awk -v RS='\n\n## ' -v marker='$(CLMARKER)' \
+		'index ( $$0, marker ) == 1 { print }' > $@
+	$(Q)if [ ! -s $@ ] ; then \
+	    echo "Missing $(CLMARKER) in $<" >&2 ; \
+	    exit 1 ; \
+	fi
+
+# Generate release title
+#
+$(BIN)/reltitle.txt : $(BIN)/changes.md $(MAKEDEPS)
+	$(QM)$(ECHO) "  [RELTITLE] $@"
+	$(Q)head -1 $< | sed -E \
+	    's/^\[(.*)\]\(.+\)\s+(.+)$$/\1 (\2)/; t; s/^\[(.*)\].*$$/\1/' > $@
+
+# Generate release notes
+#
+$(BIN)/relnotes.md : ../RELNOTES.tmpl.md $(BIN)/changes.md $(MAKEDEPS)
+	$(QM)$(ECHO) "  [RELNOTES] $@"
+	$(Q)( cat ../RELNOTES.tmpl.md ; tail -n +2 $(BIN)/changes.md ) | \
+	    SRCNAME="$(SRCNAME)" SRCURL="$(SRCURL)" BINURL="$(BINURL)" \
+	    $(ENVSUBST) '$$SRCNAME $$SRCURL $$BINURL' > $@
+
+endif # defined(BIN)
+
 ###############################################################################
 #
 # Documentation