Es-lint precommit hook

pre-commit

#!/bin/bash

# Created on 1400/3/31 (2021/6/21).
# Author: [S. Mahdi Mir-Ismaili](https://mirismaili.github.io)
# Based on: https://gist.github.com/linhmtran168/2286aeafe747e78f53bf

STAGED_FILES=$(git diff --cached --name-only --diff-filter=ACM | grep ".jsx\{0,1\}$")

if [[ "$STAGED_FILES" == "" ]]; then
	exit 0
fi

# Colors and styles based on: https://www.npmjs.com/package/ansi-colors-and-styles
T="\x1b[0m"    # RESET
B="\x1b[1m"    # BRIGHT
I="\x1b[2m"    # DIM
U="\x1b[4m"    # UNDERSCORE
N="\x1b[5m"    # BLINK
V="\x1b[7m"    # REVERSE
H="\x1b[8m"    # HIDDEN
K="\x1b[30m"   # FG_BLACK
R="\x1b[31m"   # FG_RED
G="\x1b[32m"   # FG_GREEN
Y="\x1b[33m"   # FG_YELLOW
E="\x1b[34m"   # FG_BLUE
M="\x1b[35m"   # FG_MAGENTA
C="\x1b[36m"   # FG_CYAN
W="\x1b[37m"   # FG_WHITE
_K="\x1b[40m"  # BG_BLACK
_R="\x1b[41m"  # BG_RED
_G="\x1b[42m"  # BG_GREEN
_Y="\x1b[43m"  # BG_YELLOW
_E="\x1b[44m"  # BG_BLUE
_M="\x1b[45m"  # BG_MAGENTA
_C="\x1b[46m"  # BG_CYAN
_W="\x1b[47m"  # BG_WHITE

PASS=true

# Check for eslint
PATH=$PWD/node_modules/.bin:$PATH
which eslint &>/dev/null
if [[ "$?" == 1 ]]; then
	echo -e "\t${_R}Please install eslint${T}"
	exit 1
fi

echo -e "\nValidating Javascript:\n"

for FILE in $STAGED_FILES; do
	eslint --max-warnings=0 "$FILE" # "--max-warnings=0" => throws on warnings (like errors)

	if mycmd; then
		echo -e "\t${G}ESLint Passed: $FILE${T}"
	else
		echo -e "\t${R}ESLint Failed: $FILE${T}"
		PASS=false
	fi
done

echo -e "\nJavascript validation completed!\n"

if ! $PASS; then
	echo -e "${_R}${W}${B}COMMIT FAILED:\n"
	echo -e "Your commit contains files that should pass ESLint but do not. "
	echo -e "Please fix the ESLint errors and try again.${T}\n"
	exit 1
else
	echo -e "${_G}COMMIT SUCCEEDED${T}\n"
fi

exit $?

Put it as pre-commit in .git/hooks/