Use different exit code for each error condition

gitwatch.sh

@@ -173,7 +173,7 @@ if [ -z "$GW_RL_BIN" ]; then RL="readlink"; else RL="$GW_RL_BIN"; fi
 
 # Check availability of selected binaries and die if not met
 for cmd in "$GIT" "$INW"; do
-	is_command "$cmd" || { stderr "Error: Required command '$cmd' not found." ; exit 1; }
+	is_command "$cmd" || { stderr "Error: Required command '$cmd' not found." ; exit 2; }
 done
 unset cmd
 
@@ -227,7 +227,7 @@ elif [ -f "$1" ]; then # if the target is a single file
     GIT_COMMIT_ARGS="" # no need to add anything more to "commit" call
 else
     stderr "Error: The target is neither a regular file nor a directory."
-    exit 1
+    exit 3
 fi
 
 # If $GIT_DIR is set, verify that it is a directory, and then add parameters to
@@ -236,7 +236,7 @@ if [ -n "$GIT_DIR" ]; then
 
     if [ ! -d "$GIT_DIR" ]; then
         stderr ".git location is not a directory: $GIT_DIR";
-        exit 1;
+        exit 4;
     fi
 
     GIT="$GIT --no-pager --work-tree $TARGETDIR --git-dir $GIT_DIR"
@@ -249,7 +249,7 @@ if ! grep "%d" > /dev/null <<< "$COMMITMSG"; then # if commitmsg didn't contain
 fi
 
 # CD into right dir
-cd "$TARGETDIR" || { stderr "Error: Can't change directory to '${TARGETDIR}'." ; exit 1; }
+cd "$TARGETDIR" || { stderr "Error: Can't change directory to '${TARGETDIR}'." ; exit 5; }
 
 if [ -n "$REMOTE" ]; then # are we pushing to a remote?
     if [ -z "$BRANCH" ]; then # Do we have a branch set to push to ?
@@ -339,7 +339,7 @@ eval "$INW" "${INW_ARGS[@]}" | while read -r line; do
         fi
 
         # CD into right dir
-        cd "$TARGETDIR" || { stderr "Error: Can't change directory to '${TARGETDIR}'." ; exit 1; }
+        cd "$TARGETDIR" || { stderr "Error: Can't change directory to '${TARGETDIR}'." ; exit 6; }
         STATUS=$($GIT status -s)
         if [ -n "$STATUS" ]; then # only commit if status shows tracked changes.
             $GIT add $GIT_ADD_ARGS # add file(s) to index