Improve bash scripts

lint_string.sh

@@ -1,6 +1,6 @@
 #!/bin/bash
-grep -rE --include="*.rs" "$1" .
-if [ $? -eq 0 ]; then
+
+if grep -rE --include="*.rs" "$1" .; then
     echo "'$1's found."
     exit 1
 else

manual_test.sh

@@ -1,3 +1,5 @@
+#!/bin/bash
+
 # Does not cover complete function
 
 echo "== TESTING -p how much wood can a woodchuck chuck if the woodchuck is 5lb and the wood is oak ==" && \

push_aur.sh

@@ -1,12 +1,13 @@
-#!/bin/sh
-cd ../gpto-bin/
+#!/bin/bash
+
+cd ../gpto-bin/ || exit
 git pull
-cd ../gpto/
+cd ../gpto/ || exit
 makepkg --printsrcinfo > ../gpto-bin/.SRCINFO
 mv PKGBUILD ../gpto-bin/
 rm *.tar.gz
-cd ../gpto-bin/
+cd ../gpto-bin/ || exit
 git add .
 git commit -m "new version"
 git push aur
-cd ../gpto
+cd ../gpto || exit

test.sh

@@ -1,4 +1,5 @@
-#!/bin/sh
+#!/bin/bash
+
 cargo fmt &&
 cargo clippy -- -D warnings &&
 cargo tarpaulin -o lcov &&

update_test.sh

@@ -1,4 +1,5 @@
-#!/bin/sh
+#!/bin/bash
+
 cargo update && \
 ./test.sh && \
 ./manual_test.sh