Be agnostic to the current working directory of the replication scripts

This is a potential error source for the artifact reviewers. Hence, it's
better to automatically handle this case instead of letting the reviewer
handle the error.

Author: ibbem

replication/esecfse22/build.sh

@@ -1,15 +1,11 @@
 #!/usr/bin/env bash
-# Assure that the script is only called from the esecfse22 folder
-current_dir=$(pwd)
-expected_path="/replication/esecfse22"
-if [[ ! $current_dir =~ $expected_path ]]; then
-  echo "error: the script must be run from inside the esecfse22 directory, i.e., DiffDetective$expected_path"
-  exit 1
-fi
 
 # We have to switch to the root directory of the project and build the Docker image from there,
 # because Docker only allows access to the files in the current file system subtree (i.e., no access to ancestors).
 # We have to do this to get access to 'src', 'docker', 'local-maven-repo', etc.
-cd ../..
+# For resiliency against different working directories during execution of this
+# script we calculate the correct path using the special bash variable
+# BASH_SOURCE.
+cd "$(dirname "${BASH_SOURCE[0]}")/../.." || exit
 
 docker build -t diff-detective -f replication/esecfse22/Dockerfile .

replication/esecfse22/execute.sh

@@ -1,11 +1,6 @@
 #!/usr/bin/env bash
 # Assure that the script is only called from the esecfse22 folder
-current_dir=$(pwd)
-expected_path="/replication/esecfse22"
-if [[ ! $current_dir =~ $expected_path ]]; then
-  echo "error: the script must be run from inside the esecfse22 directory, i.e., DiffDetective$expected_path"
-  exit 1
-fi
+cd "$(dirname "${BASH_SOURCE[0]}")/../.." || exit
 
 if [[ $# -gt 0 ]]; then
 echo "Executing $1"

replication/splc23-views/build.sh

@@ -1,15 +1,11 @@
 #!/usr/bin/env bash
-# Assure that the script is only called from the splc23-views folder
-current_dir=$(pwd)
-expected_path="/replication/splc23-views"
-if [[ ! $current_dir =~ $expected_path ]]; then
-  echo "error: the script must be run from inside the splc23-views directory, i.e., DiffDetective$expected_path"
-  exit 1
-fi
 
 # We have to switch to the root directory of the project and build the Docker image from there,
 # because Docker only allows access to the files in the current file system subtree (i.e., no access to ancestors).
 # We have to do this to get access to 'src', 'docker', 'local-maven-repo', etc.
-cd ../..
+# For resiliency against different working directories during execution of this
+# script we calculate the correct path using the special bash variable
+# BASH_SOURCE.
+cd "$(dirname "${BASH_SOURCE[0]}")/../.." || exit
 
 docker build -t diff-detective-views -f replication/splc23-views/Dockerfile .

replication/splc23-views/execute.sh

@@ -1,11 +1,6 @@
 #!/usr/bin/env bash
 # Assure that the script is only called from the splc23-views folder
-current_dir=$(pwd)
-expected_path="/replication/splc23-views"
-if [[ ! $current_dir =~ $expected_path ]]; then
-  echo "error: the script must be run from inside the splc23-views directory, i.e., DiffDetective$expected_path"
-  exit 1
-fi
+cd "$(dirname "${BASH_SOURCE[0]}")/../.." || exit
 
 if [[ $# -gt 0 ]]; then
 echo "Executing $1"