From 1fea2c7f5e576766b08502572c799270b4bea3ef Mon Sep 17 00:00:00 2001
From: Thomas Voss <mail@thomasvoss.com>
Date: Thu, 22 Feb 2024 21:50:58 +0100
Subject: Add some basics, to test macro functionality

---
 m4/__base.m4  |  7 +++++++
 m4/foot.m4    | 11 +++++++++++
 m4/head.m4    |  1 +
 m4/include.m4 |  3 +++
 4 files changed, 22 insertions(+)
 create mode 100644 m4/__base.m4
 create mode 100644 m4/foot.m4
 create mode 100644 m4/head.m4
 create mode 100644 m4/include.m4

(limited to 'm4')

diff --git a/m4/__base.m4 b/m4/__base.m4
new file mode 100644
index 0000000..611a256
--- /dev/null
+++ b/m4/__base.m4
@@ -0,0 +1,7 @@
+m4_dnl To avoid annoying conflicts with quote characters, use
+m4_dnl U+2068 FIRST STRONG ISOLATE and U+2069 POP DIRECTIONAL ISOLATE
+m4_changequote(⁨,⁩)
+
+m4_dnl We also need to avoid the comment character ever doing absolutely
+m4_dnl anything, so set it to U+FFFD REPLACEMENT CHARACTER
+m4_changecom(�)
diff --git a/m4/foot.m4 b/m4/foot.m4
new file mode 100644
index 0000000..243a84b
--- /dev/null
+++ b/m4/foot.m4
@@ -0,0 +1,11 @@
+m4_define(FOOT, ⁨
+	m4_define(⁨__HASH⁩, m4_esyscmd(
+		git rev-list --max-count=1 ⁨HEAD⁩ m4___file__
+	))
+	m4_define(⁨__DATE⁩, m4_esyscmd(
+		git log --max-count=1 --pretty='format:%cI' m4___file__ \
+		| xargs --no-run-if-empty -- date '+%-d %B %Y (%A) — %T %Z' --date \
+		| ifne -n echo 'No commit yet…'
+	))
+	m4_include(foot.gsp)
+⁩)
diff --git a/m4/head.m4 b/m4/head.m4
new file mode 100644
index 0000000..9161929
--- /dev/null
+++ b/m4/head.m4
@@ -0,0 +1 @@
+m4_define(HEAD, ⁨m4_include(head.gsp)⁩)
diff --git a/m4/include.m4 b/m4/include.m4
new file mode 100644
index 0000000..ef22bf1
--- /dev/null
+++ b/m4/include.m4
@@ -0,0 +1,3 @@
+m4_dnl Exactly the same as m4_include, but following the same naming conventions
+m4_dnl as the other macros I create.
+m4_define(INCLUDE, ⁨m4_include($1)⁩)
-- 
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