https://github.com/jesstelford/unix-tips

Tips & Tricks for using unix
https://github.com/jesstelford/unix-tips

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Tips & Tricks for using unix

• Host: GitHub
• URL: https://github.com/jesstelford/unix-tips
• Owner: jesstelford
• Created: 2016-10-09T00:59:04.000Z (about 8 years ago)
• Default Branch: master
• Last Pushed: 2024-05-09T07:23:33.000Z (8 months ago)
• Last Synced: 2024-06-14T20:57:42.037Z (7 months ago)
• Size: 5.86 KB
• Stars: 1
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# Unix Tips

## Terminal-fu

### Recursive search & replace with confirmation

UPDATE: try [the `:cdo` command](https://chrisarcand.com/vims-new-cdo-command/):

```

:Ack foo

:cdo s/foo/bar/g | update

```

Can be done with a combo of `vim` and `ag`: (http://unix.stackexchange.com/a/20255/94874)

```

SEARCH="var"; REPLACE="let"; ag -l --ignore-dir="node_modules" "$SEARCH" ./ | xargs -I{} -S1024 -o -L 1 vim -u NONE -c "%s/$SEARCH/$REPLACE/gc" -c 'wq' {}

```

**How it works**

This works by first using `ag` to find the list of files containing the pattern `"var"`,

then passes each file into `vim` one at a time (`xargs -L 1 -S1024`),

asking for confirmation of the command `%s` (which is the replacement command),

followed by the command `wq` (which saves and quits after replacing).

The switch `-u NONE` on the `vim` command will ignore your `vimrc` config files.

This is useful if you get parsing errors, etc, due to syntax highlighters or slow linters.

### Recursive `rm` of folder by name

For example; after doing JS dev for a while,

there will be loads of `node_modules` folders hidden away taking up disk space.

See what will be deleted:

```

find ./ -type d -path "./**/node_modules"

```

Perform the deletion with confirmation:

```

find ./ -type d -path "./**/node_modules" -exec sh -c 'read -p "delete {}? [y to proceed] " -n 1 -r REPLY && echo && [[ $REPLY =~ ^[Yy]$ ]] && rm -rf {}' \;

```

**How it works**

`-type d` means _directories_.

`-path X` expands `X` as a glob, and matches only against that path.

`-exec sh -c` runs a new shell instance to execute the following commands

where `{}` is replaced with the discovered file path. (`\;` ends the `-exec` option).

The shell command [asks for user permission](http://stackoverflow.com/a/1885534/473961)

before proceeding to do an `rm -rf` on that directory.