Helpful bash snippets

README.md

Helpful bash snippets

Git

Diff

Count number of additions in diff between HEAD and master for some file pattern

git diff master --numstat | \
    grep test | \
    awk -F '\t' '{print $1}' | \
    grep . | \
    node -e "console.log(require('fs').readFileSync(0).toString().split('\n').reduce((s, n) => s + (parseInt(n, 10) || 0), 0))"

Explanation

# Get the num stat between HEAD and master
git diff master --numstat | \
    # Filter only relvent data
    grep some-filter | \
    # Get first column i.e number of added lines
    awk -F '\t' '{print $1}' | \
    # Removed empty lines
    grep . | \
    # Sum each line
    node -e "console.log(require('fs').readFileSync(0).toString().split('\n').reduce((s, n) => s + (parseInt(n, 10) || 0), 0))"