#!/bin/bash
.   driglibash-base

REPO_NAME=git_update_testing
REPO_PATH=./remote
WITH_SUBMODULE="true"
SUB_NAME="submodule_for_performance_testing"
FILES_TO_KEEP='sample0'
REMOTE="./remote/performance_testing"

if [ "$WITH_SUBMODULE" = "true" ]; then
    bash creation_repo.sh -s &> /dev/null
else 
    bash creation_repo.sh &> /dev/null
fi

Help()
{
   echo "
NAME
    performance_tests.sh
SYNOPSIS
    performance_tests.sh [-a] [-h] [-n number]
OPTIONS
    -a excutes all the tests.
    -n number executes test number
    -h prints the help. 
DESCRIPTION
    This script is in writing. It allows you to measure memory and bandwidth usage. The first four test different cloning methods. Te following apply changes to the local remote before testing fetching and merging commands.
    TEST0: classic cloning 
    TEST1: --single-branch cloning
    TEST2: --depth=1 --no-single-branch cloning
    TEST3: --depth=1 cloning
    TEST4: --depth=1 with reflog and gc cloning
    TEST5: sparse-checking 1M sample0 cloning
    _________________
    TEST6: classic fetching+checking out after addition of a 1M file
    TEST7: classic fetching+checking out after removal of a 1M file
    TEST8: classic fetching+checking out after addition then removal of a 1M file

    TEST9: --depth=1 fetching+checking out after addition of a 1M file
    TEST10: --depth=1 fetching+checking out after removal of a 1M file
    TEST11: --depth=1 fetching+checking out after addition then removal of 1M a file

    TEST12: --depth=1 fetching+checking out with reflog annd gc after addition of a 1M file
    TEST13: --depth=1 fetching+checking out with reflog annd gc after removal of a 1M file
    TEST14: --depth=1 fetching+checking out with reflog annd gc after addition then removal of a 1M file

    TEST15: --depth=1 fetching+ --reset=hard after addition of a 1M file
    TEST16: --depth=1 fetching+ --reset=hard after removal of a 1M file
    TEST17:  --depth=1 fetching+ --reset=hard after addition then removal of a 1M file

    TEST18: --depth=1 fetching+ --reset=hard and reflog and gc after addition of a 1M file
    TEST19: --depth=1 fetching+ --reset=hard and reflog and gc after removal of a 1M file
    TEST20: --depth=1 fetching+ --reset=hard and reflog and gc after addition then removal of a 1M file

    TEST21: --depth=1 fetching+checking out after addition of a 1M file in submodule
    TEST22: --depth=1 fetching+checking out after removal of a 1M file in submodule
    TEST23: --depth=1 fetching+checking out after addition then removal of a 1M file in submodule 

    TEST24: --depth=1 fetching+merging -X theirs with reflog and gc after addition of a 1M file
    TEST25: --depth=1 fetching+merging -X theirs with reflog and gc after removal of a 1M file
    TEST26: --depth=1 fetching+merging -X theirs with reflog and gc after addition then removal of a 1M file

    TEST27: --depth=1 fetching+merging -s ours with reflog and gc after addition of a 1M file
    TEST28: --depth=1 fetching+merging -s ours with reflog and gc after removal of a 1M file
    TEST29: --depth=1 fetching+merging -s ours with reflog and gc after addition then removal of a 1M file"
}

#USEFUL FUNCTIONS FOR THE TESTS
create_random_file(){
    run dd if=/dev/urandom of=$1 bs=$2 count=1 &> /dev/null
}

get_storage_used(){
    mem=$(du $1 | tail -n1 | tr -cd [:digit:])
}

get_bandwidth(){
    bw="unknown"
    bw=$(grep -e "Receiving objects:" $1 | grep -o "Receiving objects: [[:alnum:]%/(),. ]*" | tail -n1)
    bw=${bw#*,}
}

#TESTS ON THE INITIAL POPULATING OF THE REPO
section "Tests on the initial populating of the repository"
test0(){
    section TEST0
    echo "TEST 0: classic cloning."
    run git clone --recurse-submodules --remote-submodules --progress --no-local $1 &> cloning_text
    run cd $REPO_NAME
    run git submodule update --init --recursive --force --remote --progress &> /dev/null
    run cd ..
    get_storage_used "./$REPO_NAME" 
    get_bandwidth cloning_text
    echo "memory usage: $mem"
    echo "bandwidth usage (submodule excluded): $bw"    
    run rm cloning_text
    run rm -rf $REPO_NAME 
}

test1(){
    section TEST1
    echo "TEST 1: --single-branch cloning."
    run git clone --recurse-submodules --remote-submodules --progress --single-branch --no-local $1 &> cloning_text
    run cd $REPO_NAME
    run git submodule update --init --recursive --force --remote --progress &> /dev/null
    run cd ..
    get_storage_used ./$REPO_NAME
    get_bandwidth cloning_text
    echo "memory usage: $mem"
    echo "bandwidth usage (submodule excluded): $bw"
    run rm cloning_text
    run rm -rf $REPO_NAME
}

test2(){
    section TEST2
    echo "TEST 2: --depth=1 --no-single-branch"
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local --no-single-branch $1 &> cloning_text
    run cd $REPO_NAME
    run git submodule update --init --recursive --force --remote --progress --depth=1 --no-single-branch &> /dev/null
    run cd ..
    get_storage_used ./$REPO_NAME
    get_bandwidth cloning_text
    echo "memory usage: $mem"
    echo "bandwidth usage (submodule excluded): $bw"
    run rm cloning_text
    run rm -rf $REPO_NAME
}

test3(){
    section TEST3
    echo "TEST 3: --depth=1 with single-branch (default))"
    run git clone --recurse-submodules --remote-submodules --progress --single-branch --no-local --depth=1 $1 &> cloning_text
    run cd $REPO_NAME
    run git submodule update --init --recursive --force --remote --progress --depth=1 &> /dev/null
    run cd ..
    get_storage_used ./$REPO_NAME
    get_bandwidth cloning_text
    echo "memory usage: $mem"
    echo "bandwidth usage (submodule excluded): $bw"
    run rm cloning_text
    run rm -rf $REPO_NAME
}

test4(){
    section TEST4
    echo "TEST 4: --depth=1 with single-branch (default) and reflog and gc"
    run git clone --recurse-submodules --remote-submodules --progress --single-branch --no-local --depth=1 $1 &> cloning_text
    run cd $REPO_NAME
    run git submodule update --init --recursive --force --remote --progress --depth=1 &> /dev/null
    run git reset --hard
    run cd ..
    get_storage_used ./$REPO_NAME
    get_bandwidth cloning_text
    echo "memory usage: $mem"
    echo "bandwidth usage (submodule excluded): $bw"
    run rm cloning_text
    run rm -rf $REPO_NAME
}

test5(){
    section TEST5
    run mkdir $REPO_NAME
    run echo "TEST 5 : sparse-checking only $FILES_TO_KEEP with depth=1"
    #creating a git repo with sparse-checking settings
    run cd $REPO_NAME
    run git init -q
    run git config core.sparsecheckout true 
    run echo $FILES_TO_KEEP >> .git/info/sparse-checkout 
    #pulling from the remote with sparse-checking enabled
    run git remote add -f origin ../$1 &> /dev/null
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git checkout -f origin/main &> /dev/null
    get_storage_used .
    echo "memory usage: $mem"
    echo "bandwidth usage (submodule excluded): unknown"
    run cd ..
    run rm -rf $REPO_NAME
}

#Tests on the updating of the repository
#classic fetching
test6(){
    section TEST6
    run echo 'TEST 6: after addition of a 1M file'
    #initialization
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used . 
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    create_random_file 'sample5' '1M' #adding a 1M file
    run git add sample5 
    run git commit --quiet -m"fourth 1M sample created"
    run cd ../../$REPO_NAME
    #fetching
    run git submodule update --init --recursive --force --remote &> /dev/null
    run git fetch --progress --tags --prune --prune-tags origin &> /dev/null
    run git checkout -f origin/main &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: +$mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~1
    run cd ../..
    run rm -rf performance_testing
}
test7(){
    section TEST7
    run echo 'TEST 7: after removal of a 1M file'
    #initialization
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    run rm sample0
    run git add sample0 
    run git commit --quiet -m"1M sample0 deleted"
    run cd ../../$REPO_NAME
    #fetching
    run git submodule update --init --recursive --force --remote &> /dev/null
    run git fetch --progress --tags --prune --prune-tags origin &> /dev/null
    run git checkout -f origin/main &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: $mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~1
    run git clean -df
    run cd ../..
    run rm -rf performance_testing
}
test8(){
    section TEST8
    run echo 'TEST 8: after addition then removal of a 1M file'
    #initialization
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem 
    #modification of the remote repo  
    run cd ../$REMOTE
    create_random_file 'sample5' '1M' #adding a 1M file
    run git add sample5 
    run git commit --quiet -m"fourth 1M sample created"
    run rm sample5
    run git add sample5
    run git commit --quiet -m"1M "sample5" deleted"
    run cd ../../$REPO_NAME
    #fetching
    run git submodule update --init --recursive --force --remote &> /dev/null
    run git fetch --progress --tags --prune --prune-tags origin &> /dev/null
    run git checkout -f origin/main &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: $mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~2
    run cd ../..
    run rm -rf performance_testing
}

#fetching with --depth=1
test9(){
    section TEST9
    run echo 'TEST 9: after addition of a 1M file'
    #initialization
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    create_random_file 'sample5' '1M' #adding a 1M file
    run git add sample5 
    run git commit --quiet -m"fourth 1M sample created"
    run cd ../../$REPO_NAME
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git checkout -f origin/main &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: +$mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~1 
    run cd ../..
    run rm -rf performance_testing
}
test10(){
    section TEST10
    run echo 'TEST 10: after removal of a 1M file'
    #initialization 
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    run rm sample0
    run git add sample0
    run git commit --quiet -m"1M sample0 deleted"
    run cd ../../$REPO_NAME
    #fetching
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git checkout -f origin/main &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: $mem"
    run cd ../$REMOTE
    git reset --hard -q HEAD~1
    run cd ../..
    run rm -rf performance_testing
}
test11(){
    section TEST11
    run echo 'TEST 11: after addition then removal of a 1M file'
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    create_random_file 'sample5' '1M' #adding a 1M file
    run git add sample5 
    run git commit --quiet -m"fourth 1M sample created"
    run rm sample5
    run git add sample5
    run git commit --quiet -m"1M "sample5" deleted"
    run cd ../../$REPO_NAME
    #fetching
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git checkout -f origin/main &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: $mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~2
    run cd ../..
    run rm -rf performance_testing
}

# --depth=1 fetching with reflog and gc
test12(){
    section TEST12
    run echo 'TEST 12: after addition of a 1M file'
    #initialization
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    create_random_file 'sample5' '1M' #adding a 1M file
    run git add sample5 
    run git commit --quiet -m"fourth 1M sample created"
    run cd ../../$REPO_NAME
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git checkout -f origin/main &> /dev/null
    run git reflog expire --expire=now --all &> /dev/null
    run git gc --aggressive --prune=now &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: +$mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~1 
    run cd ../..
    run rm -rf performance_testing
}
test13(){
    section TEST13
    run echo 'TEST 13: after removal of a 1M file'
    #initialization 
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    run rm sample0
    run git add sample0
    run git commit --quiet -m"1M sample0 deleted"
    run cd ../../$REPO_NAME
    #fetching
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git checkout -f origin/main &> /dev/null
    run git reflog expire --expire=now --all &> /dev/null
    run git gc --aggressive --prune=now &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: $mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~1
    run cd ../..
    run rm -rf performance_testing
}
test14(){
    section TEST14
    run echo 'TEST 14: after addition then removal of a 1M file'
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    create_random_file 'sample5' '1M' #adding a 1M file
    run git add sample5 
    run git commit --quiet -m"fourth 1M sample created"
    run rm sample5
    run git add sample5
    run git commit --quiet -m"1M "sample5" deleted"
    run cd ../../$REPO_NAME
    #fetching
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git checkout -f origin/main &> /dev/null
    run git reflog expire --expire=now --all &> /dev/null
    run git gc --aggressive --prune=now &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: $mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~2
    run cd ../..
    run rm -rf performance_testing
}

#--depth=1 fetching with reset --hard
test15(){
    section TEST15
    run echo 'TEST 15: after addition of a 1M file'
    #initialization
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    create_random_file 'sample5' '1M' #adding a 1M file
    run git add sample5 
    run git commit --quiet -m"fourth 1M sample created"
    run cd ../../$REPO_NAME
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git reset --hard origin/main &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: +$mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~1 
    run cd ../..
    run rm -rf performance_testing
}
test16(){
    section TEST16
    run echo 'TEST 16: after removal of a 1M file'
    #initialization 
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    run rm sample0
    run git add sample0
    run git commit --quiet -m"1M sample0 deleted"
    run cd ../../$REPO_NAME
    #fetching
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git reset --hard origin/main &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: $mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~1
    run cd ../..
    run rm -rf performance_testing
}
test17(){
    section TEST17
    run echo 'TEST 17: after addition then removal of a 1M file'
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    create_random_file 'sample5' '1M' #adding a 1M file
    run git add sample5 
    run git commit --quiet -m"fourth 1M sample created"
    run rm sample5
    run git add sample5
    run git commit --quiet -m"1M "sample5" deleted"
    run cd ../../$REPO_NAME
    #fetching
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git reset --hard origin/main &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: $mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~2
    run cd ../..
    run rm -rf performance_testing
}
#--depth=1 fetching with reset --hard and reflog and gc
test18(){
    section TEST18
    run echo 'TEST 18: after addition of a 1M file'
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    create_random_file 'sample5' '1M' #adding a 1M file
    run git add sample5 
    run git commit --quiet -m"fourth 1M sample created"
    run cd ../../$REPO_NAME
    #fetching
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git reset --hard origin/main &> /dev/null
    run git reflog expire --expire=now --all &> /dev/null
    run git gc --aggressive --prune=now &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: $mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~1
    run cd ../..
    run rm -rf performance_testing
}
test19(){
    section TEST19
    run echo 'TEST 19: after removal of a 1M file'
    #initialization 
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    run rm sample0
    run git add sample0
    run git commit --quiet -m"1M sample0 deleted"
    run cd ../../$REPO_NAME
    #fetching
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git reset --hard origin/main &> /dev/null
    run git reflog expire --expire=now --all &> /dev/null
    run git gc --aggressive --prune=now &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: $mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~1
    run cd ../..
    run rm -rf performance_testing
}
test20(){
    section TEST20
    run echo 'TEST 20: after addition then removal of a 1M file'
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    create_random_file 'sample5' '1M' #adding a 1M file
    run git add sample5 
    run git commit --quiet -m"fourth 1M sample created"
    run rm sample5
    run git add sample5
    run git commit --quiet -m"1M "sample5" deleted"
    run cd ../../$REPO_NAME
    #fetching
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git reset --hard origin/main &> /dev/null
    run git reflog expire --expire=now --all &> /dev/null
    run git gc --aggressive --prune=now &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: $mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~2
    run cd ../..
    run rm -rf performance_testing
}
#--depth=1 fetching after modification applied in submodule
test21(){
    section TEST21
    run echo 'TEST 21: after addition of a 1M file'
    if [ "$WITH_SUBMODULE" = "true" ]; then
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
        run cd $REPO_NAME
        get_storage_used .
        mem_before=$mem
        #modification of the remote submodule  
        run cd ..
        run cd $REPO_PATH/$SUB_NAME
        create_random_file 'sub_sample1' '1M'
        run git add sub_sample1
        run git commit --quiet -m"second 1M sample created"
        run cd ../../$REPO_NAME
        #fetching
        run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
        run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
        run git checkout -f origin/main &> /dev/null
        get_storage_used .
        mem_after=$mem
        mem=$(($mem_after-$mem_before))
        echo "memory usage: $mem"
        run cd ../$REPO_PATH/$SUB_NAME
        run git reset --hard -q HEAD~1
        run cd ../..
        run rm -rf performance_testing
    else 
        echo "This test will not be performed because we are in no-submodule mode. Change boolean \$WITH_SUBMODULE to switch."
    fi
}

test22(){
    section TEST22
    run echo 'TEST 22: after removal of a 1M file'
    if [ "$WITH_SUBMODULE" = "true" ]; then
        run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
        run cd $REPO_NAME
        get_storage_used .
        mem_before=$mem
        #modification of the remote submodule  
        run cd ..
        run cd $REPO_PATH/$SUB_NAME
        rm sub_sample0
        run git add sub_sample0
        run git commit --quiet -m"1M 'sub_sample0' deleted"
        run cd ../../$REPO_NAME
        #fetching
        run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
        run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
        git checkout -f origin/main &> /dev/null
        get_storage_used .
        mem_after=$mem
        mem=$(($mem_after-$mem_before))
        echo "memory usage: $mem"
        run cd ../$REPO_PATH/$SUB_NAME
        run git reset --hard -q HEAD~1
        run cd ../..
        run rm -rf performance_testing
    else 
        echo "This test will not be performed because we are in no-submodule mode. Change boolean \$WITH_SUBMODULE to switch."
    fi
}

test23(){
    section TEST23
    run echo 'TEST 23: after addition then removal of a 1M file'
    if [ "$WITH_SUBMODULE" = "true" ]; then
        run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
        run cd $REPO_NAME
        get_storage_used .
        mem_before=$mem
        #modification of the remote submodule  
        run cd ..
        run cd $REPO_PATH/$SUB_NAME
        create_random_file 'sub_sample1' '1M'
        run git add sub_sample1
        run git commit --quiet -m"second 1M sample created"
        rm sub_sample1
        run git add sub_sample1
        run git commit --quiet -m"1M 'sub_sample1' deleted"
        run cd ../../$REPO_NAME
        #fetching
        run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
        run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
        run git checkout -f origin/main &> /dev/null
        get_storage_used .
        mem_after=$mem
        mem=$(($mem_after-$mem_before))
        echo "memory usage: $mem"
        run cd ../$REPO_PATH/$SUB_NAME
        run git reset --hard -q HEAD~2
        run cd ../..
        run rm -rf performance_testing
    else 
        echo "This test will not be performed because we are in no-submodule mode. Change boolean \$WITH_SUBMODULE to switch."
    fi
}

# --depth=1 fetching+merging -X theirs with reflog and gc
test24(){
    section TEST24
    run echo 'TEST 24: after addition of a 1M file'
    #initialization
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    create_random_file 'sample5' '1M' #adding a 1M file
    run git add sample5 
    run git commit --quiet -m"fourth 1M sample created"
    run cd ../../$REPO_NAME
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git merge -X theirs --allow-unrelated-histories &> /dev/null
    run git reflog expire --expire=now --all &> /dev/null
    run git gc --aggressive --prune=now &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: +$mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~1 
    run cd ../..
    run rm -rf performance_testing
}
test25(){
    section TEST25
    run echo 'TEST 25: after removal of a 1M file'
    #initialization 
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    run rm sample0
    run git add sample0
    run git commit --quiet -m"1M sample0 deleted"
    run cd ../../$REPO_NAME
    #fetching
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git merge -X theirs --allow-unrelated-histories &> /dev/null
    run git reflog expire --expire=now --all &> /dev/null
    run git gc --aggressive --prune=now &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: $mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~1
    run cd ../..
    run rm -rf performance_testing
}
test26(){
    section TEST26
    run echo 'TEST 26: after addition then removal of a 1M file'
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    create_random_file 'sample5' '1M' #adding a 1M file
    run git add sample5 
    run git commit --quiet -m"fourth 1M sample created"
    run rm sample5
    run git add sample5
    run git commit --quiet -m"1M "sample5" deleted"
    run cd ../../$REPO_NAME
    #fetching
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git merge -X theirs --allow-unrelated-histories &> /dev/null
    run git reflog expire --expire=now --all &> /dev/null
    run git gc --aggressive --prune=now &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: $mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~2
    run cd ../..
    run rm -rf performance_testing
}

# --depth=1 fetching+merging -s ours with reflog and gc
test27(){
    section TEST27
    run echo 'TEST 27: after addition of a 1M file'
    #initialization
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    create_random_file 'sample5' '1M' #adding a 1M file
    run git add sample5 
    run git commit --quiet -m"fourth 1M sample created"
    run cd ../../$REPO_NAME
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git switch -c temp origin/main &> /dev/null #creating a temporary branch identical to origin/main
    run git merge -s ours --allow-unrelated-histories main &> /dev/null
    run git checkout main &> /dev/null
    run git merge --allow-unrelated-histories temp &> /dev/null
    run git branch -D temp &> /dev/null
    run git reflog expire --expire=now --all &> /dev/null
    run git gc --aggressive --prune=now &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: +$mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~1 
    run cd ../..
    run rm -rf performance_testing
}
test28(){
    section TEST28
    run echo 'TEST 28: after removal of a 1M file'
    #initialization 
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    run rm sample0
    run git add sample0
    run git commit --quiet -m"1M sample0 deleted"
    run cd ../../$REPO_NAME
    #fetching
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git switch -c temp origin/main &> /dev/null #creating a temporary branch identical to origin/main
    run git merge -s ours --allow-unrelated-histories main &> /dev/null
    run git checkout main &> /dev/null
    run git merge --allow-unrelated-histories temp &> /dev/null
    run git branch -D temp &> /dev/null
    run git reflog expire --expire=now --all &> /dev/null
    run git gc --aggressive --prune=now &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: $mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~1
    run cd ../..
    run rm -rf performance_testing
}
test29(){
    section TEST29
    run echo 'TEST 29: after addition then removal of a 1M file'
    run git clone --recurse-submodules --remote-submodules --progress --depth=1 --no-local $1 &> /dev/null
    run cd $REPO_NAME
    get_storage_used .
    mem_before=$mem
    #modification of the remote repo  
    run cd ../$REMOTE
    create_random_file 'sample5' '1M' #adding a 1M file
    run git add sample5 
    run git commit --quiet -m"fourth 1M sample created"
    run rm sample5
    run git add sample5
    run git commit --quiet -m"1M "sample5" deleted"
    run cd ../../$REPO_NAME
    #fetching
    run git submodule update --init --recursive --force --depth=1 --remote &> /dev/null
    run git fetch --progress --tags --depth=1 --prune --prune-tags origin &> /dev/null
    run git switch -c temp origin/main &> /dev/null #creating a temporary branch identical to origin/main
    run git merge -s ours --allow-unrelated-histories main &> /dev/null
    run git checkout main &> /dev/null
    #run git merge --allow-unrelated-histories temp &> /dev/null
    run git branch -D temp &> /dev/null
    run git reflog expire --expire=now --all &> /dev/null
    run git gc --aggressive --prune=now &> /dev/null
    get_storage_used .
    mem_after=$mem
    mem=$(($mem_after-$mem_before))
    echo "memory usage: $mem"
    run cd ../$REMOTE
    run git reset --hard -q HEAD~2
    run cd ../..
    run rm -rf performance_testing
}


while getopts ":hn:a" option; do
   case $option in
      h) # display Help
         Help
         exit;;
      n) 
            TEST_NUM=$OPTARG;;
      a) 
            ALL_TESTS=true;; 
     \?) # Invalid option
         echo "Error: Invalid option here"
         exit;;
   esac
done

if [ "$ALL_TESTS" = "true" ]; then
    test0 $REMOTE
    test1 $REMOTE
    test2 $REMOTE
    test3 $REMOTE
    test4 $REMOTE
    test5 $REMOTE
    echo $(section "Tests on the updating of the repository")
    section "classic fetching+checking out"
    test6 $REMOTE
    test7 $REMOTE
    test8 $REMOTE
    echo $(section "fetching+checking out with --depth=1")
    test9 $REMOTE
    test10 $REMOTE
    test11 $REMOTE
    echo $(section "--depth=1 fetching+checking out reflog and gc")
    test12 $REMOTE
    test13 $REMOTE
    test14 $REMOTE
    echo $(section "--depth=1 fetching+ reset --hard")
    test15 $REMOTE
    test16 $REMOTE
    test17 $REMOTE
    echo $(section "--depth=1 fetching+ reset --hard and reflog and gc")
    test18 $REMOTE
    test19 $REMOTE
    test20 $REMOTE
    echo $(section "--depth=1 fetching+checking out after modification applied in submodule")
    test21 $REMOTE
    test22 $REMOTE
    test23 $REMOTE
    echo $(section "--depth=1 fetching+merging -X theirs with reflog and gc")
    test24 $REMOTE
    test25 $REMOTE
    test26 $REMOTE
    echo $(section "--depth=1 fetching+merging -s ours with reflog and gc")
    test27 $REMOTE
    test28 $REMOTE
    test29 $REMOTE


elif [ -n "$TEST_NUM" ]; then
    case $TEST_NUM in
        0) 
            test0 $REMOTE;;
        1)
            test1 $REMOTE;;
        2) 
            test2 $REMOTE;;
        3) 
            test3 $REMOTE;;
        4) 
            test4 $REMOTE;;
        5) 
            test5 $REMOTE;;
        6)
            test6 $REMOTE;;
        7) 
            test7 $REMOTE;;
        8) 
            test8 $REMOTE;;
        9)
            test9 $REMOTE;;
        10)
            test10 $REMOTE;;
        11)
            test11 $REMOTE;;
        12)
            test12 $REMOTE;;
        13)     
            test13 $REMOTE;;
        14)
            test14 $REMOTE;;
        15)
            test15 $REMOTE;;
        16)
            test16 $REMOTE;;
        17)
            test17 $REMOTE;;
        18)     
            test18 $REMOTE;;
        19)
            test19 $REMOTE;;
        20)
            test20 $REMOTE;;
        21)
            test21 $REMOTE;;
        22)
            test22 $REMOTE;;
        23)
            test23 $REMOTE;;
        24)
            test24 $REMOTE;;
        25)
            test25 $REMOTE;;
        26)
            test26 $REMOTE;;
        26)
            test26 $REMOTE;;
        27)
            test27 $REMOTE;;
        28)
            test28 $REMOTE;;
        29)
            test29 $REMOTE;;
        *)
            echo "Error: Invalid test number"
            die;;
    esac
else
    Help
fi

#add the submodules management to the cloning
#add run