Find TypeScript files that fail with --strictNullChecks enabled

strict_null_checks.sh

#!/bin/bash

# Brute force search for TypeScript files in the current directory that fail
# the `--strictNullChecks` flag. YMMV.

# edit this function to exclude files that _shouldn't_ be checked.
filter_defs() {
  grep -v node_modules \
  | grep -v '.d.ts$' \
  | sort \
  | uniq
}

TS_FLAGS='--strictNullChecks --outDir=/dev/null'

TS_FILES=$(find . -name '*.ts' \
  | cut -d/ -f2- \
  | filter_defs)
TS_ERRORS=$(yarn tsc --noEmit $TS_FLAGS 2> /dev/null \
  | grep -o '.*\.ts[x]*([0-9,]*): error' \
  | cut -d\( -f1 \
  | filter_defs)

comm -23 <(echo "$TS_FILES") <(echo "$TS_ERRORS")