From 6897c0ae70892e40fd7603e4d00662038c01a82d Mon Sep 17 00:00:00 2001
From: n-peugnet <n.peugnet@free.fr>
Date: Mon, 4 Oct 2021 20:37:50 +0200
Subject: add checks for consistency

It works ok, but man, git is good
---
 exp/Makefile | 11 ++++++-----
 exp/exp.sh   | 30 ++++++++++++++++++++++++++++--
 2 files changed, 34 insertions(+), 7 deletions(-)

diff --git a/exp/Makefile b/exp/Makefile
index a5b4864..aaf377c 100644
--- a/exp/Makefile
+++ b/exp/Makefile
@@ -1,6 +1,7 @@
 REPO_URL  := https://club1.fr/~nicolas/git/dna-backup/
 
-export MAX_VERSION ?= 3
+export DNA_BACKUP  ?= ../dna-backup
+export MAX_VERSION ?= 5
 export COMMITS     ?= commits
 export BACKUP      ?= backup
 export DIFFS       ?= diffs
@@ -47,7 +48,7 @@ results: backup run
 	| sort -k2 \
 	> $@
 
-run: $(COMMITS) ../dna-backup | $(DATADIRS)
+run: $(COMMITS) $(DNA_BACKUP) | $(DATADIRS)
 	rm -rf $(DATADIRS:%=%/*)
 	./exp.sh
 	touch $@
@@ -55,8 +56,8 @@ run: $(COMMITS) ../dna-backup | $(DATADIRS)
 backup diffs:
 	mkdir $@
 
-../dna-backup: .FORCE
-	@$(MAKE) -C .. --no-print-directory dna-backup
+$(DNA_BACKUP): .FORCE
+	@$(MAKE) -C $(@D) --no-print-directory $(@F)
 
 $(COMMITS): | repo git
 	$(GITC) log --reverse --no-merges --pretty=tformat:"%H	%as" \
@@ -74,7 +75,7 @@ clean: mostlyclean
 	rm -f $(COMMITS)
 
 mostlyclean: resultsclean
-	rm -rf $(DATADIRS) versions
+	rm -rf $(DATADIRS) versions run
 
 resultsclean:
 	rm -f results summary.csv $(SIZEFILES)
diff --git a/exp/exp.sh b/exp/exp.sh
index 9edf367..59a5ef1 100755
--- a/exp/exp.sh
+++ b/exp/exp.sh
@@ -1,6 +1,7 @@
 #!/bin/bash
 
 # This script expects the following variables to be exported:
+# - DNA_BACKUP: the path to dna-backup binary
 # - REPO_PATH: the path of the repo the experiment is based on
 # - MAX_VERSION: the max number for versions for the experiment
 # - COMMITS: the name of the file that contains the lists of versions
@@ -20,10 +21,35 @@ do
 	$GITC checkout $hash
 
 	# create diff for this version
-	$GITC diff --minimal --binary --unified=0 $prev | gzip > $DIFFS/$i.diff.gz
+	$GITC diff --minimal --binary --unified=0 $prev \
+	| gzip \
+	> "$DIFFS/$i.diff.gz"
 
 	# create backup for this version
-	../dna-backup commit -v 2 $REPO_PATH $BACKUP
+	$DNA_BACKUP commit -v 2 $REPO_PATH $BACKUP
+
+	if [[ $(( $i % 4 )) == 0 ]]
+	then
+		# check diff correctness
+		TEMP=$(mktemp -d)
+		for n in $(seq 0 $i)
+		do
+			cat "$DIFFS/$n.diff.gz" \
+			| gzip --decompress \
+			| git -C $TEMP apply --binary --unidiff-zero --whitespace=nowarn - \
+			|| echo "Git patchs do not match source"
+		done
+		cp $REPO_PATH/.git $TEMP/
+		diff --brief --recursive $REPO_PATH $TEMP \
+		|| echo "dna-backup restore do not match source"
+		rm -rf $TEMP
+
+		# check backup correctness
+		TEMP=$(mktemp -d)
+		$DNA_BACKUP restore -v 2 $BACKUP $TEMP
+		diff --brief --recursive $REPO_PATH $TEMP
+		rm -rf $TEMP
+	fi
 
 	prev=$hash
 	let i++
-- 
cgit v1.2.3