From 54fea2f2a3ee0e6b027cd8be0a8a5a89872a8633 Mon Sep 17 00:00:00 2001
From: Thomas Voss <mail@thomasvoss.com>
Date: Sun, 30 Jul 2023 04:28:43 +0200
Subject: Try out using m4 for footers

---
 Makefile                 | 13 +++++++------
 include/footer.html      |  2 +-
 include/lib.m4           |  1 +
 src/srp/fw-ec/index.html |  2 +-
 4 files changed, 10 insertions(+), 8 deletions(-)
 create mode 100644 include/lib.m4

diff --git a/Makefile b/Makefile
index da2a9b6..b670d3d 100644
--- a/Makefile
+++ b/Makefile
@@ -1,9 +1,10 @@
 .PHONY: check clean serve
 
-srcdirs := ${shell find src -type d}
-outdirs := ${srcdirs:src%=out%}
-sources := ${shell find src -type f -name 'index.html' -or -name '*.css' -or -name '*.svg'}
-outputs := ${sources:src/%=out/%}
+includes := ${wildcard include/*}
+srcdirs  := ${shell find src -type d}
+outdirs  := ${srcdirs:src%=out%}
+sources  := ${shell find src -type f -name 'index.html' -or -name '*.css' -or -name '*.svg'}
+outputs  := ${sources:src/%=out/%}
 
 all: ${outdirs} ${outputs}
 
@@ -15,8 +16,8 @@ out/%: src/%
 	@cp $< $@
 	@printf 'CP\t%s\n' "$@"
 
-out/%.html: src/%.html include/head.html
-	@m4 -P ${foreach dir,${^D},-I${dir}} $< >$@
+out/%.html: src/%.html ${includes}
+	@m4 -P ${foreach dir,${^D},-I${dir}} include/lib.m4 $< >$@
 	@printf 'M4\t%s\n' "$@"
 
 src/srp/fw-ec/index.html: src/srp/fw-ec/led.diff.html
diff --git a/include/footer.html b/include/footer.html
index c1c20e2..700ae8a 100644
--- a/include/footer.html
+++ b/include/footer.html
@@ -1,4 +1,4 @@
 <small>
 	Page last edited:
-	m4_esyscmd(git log -1 --pretty='format:%cI' Makefile | xargs date +'%A %d %B %Y — %T %Z' -d)
+	m4_esyscmd(git log -1 --pretty='format:%cI' m4___caller__ | xargs date +'%A %d %B %Y — %T %Z' -d)
 </small>
diff --git a/include/lib.m4 b/include/lib.m4
new file mode 100644
index 0000000..1adaa16
--- /dev/null
+++ b/include/lib.m4
@@ -0,0 +1 @@
+m4_define(m4_footer, `m4_define(`m4___caller__', m4___file__)m4_include(footer.html)')
diff --git a/src/srp/fw-ec/index.html b/src/srp/fw-ec/index.html
index c04da7f..d8a48ba 100644
--- a/src/srp/fw-ec/index.html
+++ b/src/srp/fw-ec/index.html
@@ -92,7 +92,7 @@
 		<hr>
 		
 		<footer>
-			m4_include(footer.html)
+			m4_footer
 		</footer>
 	</body>
 </html>
-- 
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