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vim-ale/watchexec/README.md
2021-08-15 05:57:26 +00:00

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---
title: watchexec
homepage: https://github.com/watchexec/watchexec
tagline: |
watchexec is a simple, standalone tool that watches a path and runs a command whenever it detects modifications.
---
To update or switch versions, run `webi watchexec@stable` (or `@v1.17`, `@beta`,
etc).
## Cheat Sheet
`watchexec` runs a given command when any files in watched directories change. \
It respects `.[git]ignore`.
Here's the shortlist of options we've found most useful:
```txt
-w, --watch ./src/ watch the given directory
-e, --exts js,css watch only the given extensions
-i, --ignore '*.md' do not watch the given pattern
-d, --debounce 5000 the minimum number of milleseconds
to wait between changes
-r, --restart restart the process (for servers, etc)
-s, --signal SIGHUP like -r, but with a signal (ex: SIGHUP)
-c, --clear clear the screen between command runs
-W (wait) ignore all changes as the command runs
-- npm start what command to run, with its arguments
--no-ignore disregard both .ignore and .gitignore
--no-vcs-ignore disregard only .gitignore
--no-default-ignore disregard built-in ignore lists
```
### How to use
Example: List the directory when any files change.
```bash
watchexec -c -- ls -lah
```
### Advanced Usage Example
Here's a "kitchen sink" example.
```bash
watchexec -c -r -s SIGKILL -d 2000 -W --verbose \
-w ./src -w ./server.js \
-e js,css,html \
-i '*.md' -i 'package-lock.json' \
-- npm run build
```
### How to use (Node, Go, Rust, rsync)
These examples show how you might use this for builds, servers, and publishing
or deploying.
```bash
# Node / npm
watchexec -W -- npm run build
watchexec -r -- npm start
# Golang
watchexec -- go build .
watchexec -r -- go run .
# Rust
watchexec -- cargo build --bin
watchexec -r -- cargo run --bin
# rsync (local copy)
watchexec -- rsync -avhP ./ ./srv/MY_PROJECT/
# rsync (remote publish)
watchexec -- rsync -avhP ./ app@example.com:~/srv/MY_PROJECT/
```