From c2e3ef1e6336c9d8f078df0d73bf111913f9e750 Mon Sep 17 00:00:00 2001
From: Philipp Le <philipp-le-prviat@freenet.de>
Date: Wed, 1 Jul 2020 23:40:02 +0200
Subject: Replace manually set revision number and date by Git commit number
 and date (automatically generated)

---
 Makefile             |  8 ++++++--
 common/imprint.tex   |  3 +++
 common/settings.tex  |  4 +++-
 common/titlepage.tex |  2 +-
 gen_vcs_info.sh      | 29 +++++++++++++++++++++++++++++
 5 files changed, 42 insertions(+), 4 deletions(-)
 create mode 100755 gen_vcs_info.sh

diff --git a/Makefile b/Makefile
index f4c0e03..fe43eda 100644
--- a/Makefile
+++ b/Makefile
@@ -24,11 +24,11 @@ clean:
 	mkdir -p $(BUILD_DIR)
 	cd $(BUILD_DIR) ; rm -f *.aux *.fdb_latexmk *.fls *.lof *.log *.lot *.pdf *.synctex.gz
 
-$(BUILD_DIR)/DCS.pdf: main/DCS.tex $(COMMON_DEPS) */*.tex $(ALL_SVGS)
+$(BUILD_DIR)/DCS.pdf: main/DCS.tex $(COMMON_DEPS) */*.tex $(ALL_SVGS) $(BUILD_DIR)/vcs_info.tex
 	mkdir -p $(BUILD_DIR)
 	cd $(BUILD_DIR) ; $(LATEXMK) ../$<
 
-$(BUILD_DIR)/%.pdf: main/%.tex $(COMMON_DEPS) %/*.tex $(ALL_SVGS)
+$(BUILD_DIR)/%.pdf: main/%.tex $(COMMON_DEPS) %/*.tex $(ALL_SVGS) $(BUILD_DIR)/vcs_info.tex
 	mkdir -p $(BUILD_DIR)
 	cd $(BUILD_DIR) ; $(LATEXMK) ../$<
 
@@ -53,6 +53,10 @@ $(BUILD_DIR)/svg/ch04_win_tri.pdf: chapter04/win_tri.svg
 $(BUILD_DIR)/svg/ch04_win_gauss.pdf: chapter04/win_gauss.svg
 $(BUILD_DIR)/svg/ch06_FFT_Butterfly.pdf: chapter06/FFT_Butterfly.svg
 
+.PHONY: $(BUILD_DIR)/vcs_info.tex
+$(BUILD_DIR)/vcs_info.tex:
+	./gen_vcs_info.sh > $@
+
 %-watch: main/%.tex
 	mkdir -p $(BUILD_DIR)
 	cd $(BUILD_DIR) ; $(LATEXMK_PVC) ../$<
diff --git a/common/imprint.tex b/common/imprint.tex
index 6a3e9a1..1b8ab2a 100644
--- a/common/imprint.tex
+++ b/common/imprint.tex
@@ -37,6 +37,9 @@ License:
 
 \LaTeX{} sources at \url{https://github.com/pl33/dcs-lecture-notes}.
 
+Git commit hash: \texttt{\VcsCommitHashLong{} \ifdefined\VcsIsClean \else (dirty) \fi}\\
+Git commit date: \texttt{\VcsCommitTime}
+
 \vspace{1.5em}
 
 \hrule{}
diff --git a/common/settings.tex b/common/settings.tex
index e382b96..bc25edf 100644
--- a/common/settings.tex
+++ b/common/settings.tex
@@ -298,6 +298,8 @@
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 % PDF Metadata
 
+\input{../build/vcs_info.tex}
+
 \def\hyperrefgeneraltitle{Digital Communication Systems - \thekindofdocument{}}
 \ifdefined\thesubtitle
 \def\hyperreftitle{\hyperrefgeneraltitle{} - \thesubtitle{}}
@@ -308,7 +310,7 @@
 \usepackage[
 	pdftitle={\hyperreftitle{}},
 	pdfauthor={Philipp Le},
-	pdfcreator={LaTeX with hyperref and KOMA-Script on Arch Linux},
+	pdfcreator={LaTeX with hyperref and KOMA-Script on Arch Linux, Git commit \VcsCommitHashLong (\VcsCleanStr{}\VcsDirtyStr{})},
 	pdfsubject={},
 	pdfkeywords={},
 	pdfstartview={Fit},
diff --git a/common/titlepage.tex b/common/titlepage.tex
index c83303e..0832f5c 100755
--- a/common/titlepage.tex
+++ b/common/titlepage.tex
@@ -58,6 +58,6 @@
 	
 	\begin{flushright}
 		\footnotesize
-		Revision \therevision, \therevisiondate
+		Serial number \VcsCommitNo, \VcsCommitDate
 	\end{flushright}
 \end{titlepage}
diff --git a/gen_vcs_info.sh b/gen_vcs_info.sh
new file mode 100755
index 0000000..129ec2c
--- /dev/null
+++ b/gen_vcs_info.sh
@@ -0,0 +1,29 @@
+#!/bin/bash
+
+SHA1_SHORT=`git rev-parse --short HEAD`
+SHA1_LONG=`git rev-parse HEAD`
+COMMIT_NO=`git rev-list --count HEAD`
+TIME_ISO=`git log -1 --format=%cd --date=iso8601`
+TIME_ISO_STRICT=`git log -1 --format=%cd --date=iso8601-strict`
+DATE=`git log -1 --format=%cd --date=short`
+
+if [ -z "$(git status --porcelain)" ]; then
+    CLEAN="clean"
+    DIRTY=""
+    IS_CLEAN="\\def\\VcsIsClean{}"
+else
+    CLEAN=""
+    DIRTY="dirty"
+    IS_CLEAN=""
+fi
+
+echo -e "\\def\\VcsCommitHashShort{$SHA1_SHORT}
+\\def\\VcsCommitHashLong{$SHA1_LONG}
+\\def\\VcsCommitNo{$COMMIT_NO}
+\\def\\VcsCommitTime{$TIME_ISO}
+\\def\\VcsCommitTimeISO{$TIME_ISO_STRICT}
+\\def\\VcsCommitDate{$DATE}
+\\def\\VcsCleanStr{$CLEAN}
+\\def\\VcsDirtyStr{$DIRTY}
+$IS_CLEAN
+"
-- 
cgit v1.1