5 ms·

FYI, one of my favorite Ruby idioms is to capture command output with `open(...){_1.read}` pp open("|ls -lh /usr/bin/ls"){_1.read} "-rwxr-xr-x 1 root root

• vidarh 2y ago
  Am I missing something - it's 2am here, so possibly - or could you not just use backticks for the first one?
  • ryanmjacobs 2y ago
    Oh that's embarrassing -- you're right, the first example doesn't make sense. Kinda pointless actually haha I use it for code like this: raw = IO.popen(%W[gzip -d -c -- #{path}]){_1.read} raw = IO.popen(%W[gzip -d -c], in: pipe){_1.read} raw = IO.popen(%W[git status --porcelain -- #{path}]){_1.read} Useful because it eliminates /bin/sh footguns (e.g. `md5sum hello&world` forking or `~john` expanding), plus you get kernel.spawn() options. `open("| ...)` only made sense for the second example. Anyway, I find "_1" more eye-pleasing than: IO.popen(%W[gzip -d -c #{path}]){|io| io.read}