Grasp is a command line utility that allows you to search and replace your JavaScript code - but unlike programs such as grep or sed, it searches the structure behind your code (the abstract syntax tree), rather than simply the text you've written - this allows you to:
- Search your code with unparalleled power
- Quickly and easily refactor your code
- Implement basic macros in a single line
Latest blog post: Grasp 0.4.0 released with ES6 support!
Search using CSS style selectors
$ grasp 'if.test[op=&&]' a.js 2: if (x && f(x)) { return x; } 5: if (xs.length && ys.length) { 10: if (x == 3 && list[x]) {
Search using JS code w/ wildcards
$ grasp -e 'return __ + __' b.js 3: if (x < 2) { return x + 2; } 13: return '>>' + str.slice(2); 15: return f(z) + x;
Make complex replacements
$ cat c.js f(x < y, x == z); $ grasp bi --replace '{{.r}}+{{.l}}' c.js f(y+x, z+x);
Follow @gkzahariev
for updates on Grasp.
Demo!
Available commands: grasp, ls, cd, cat, edit, clear, pwd, touch, echo, cp, mv, rm, mkdir, rmdir, |, <, >, >>.
Try one of the examples above. grasp --help for help.