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39 lines
1.0 KiB
Plaintext
39 lines
1.0 KiB
Plaintext
---
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syntax: markdown
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tags: [tldr, common]
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source: https://github.com/tldr-pages/tldr.git
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---
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# entr
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> Run arbitrary commands when files change.
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> See also: `watchexec`.
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> More information: <https://eradman.com/entrproject/>.
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- Rebuild with `make` if any file in any subdirectory changes:
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`{{ag --files-with-matches}} | entr {{make}}`
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- Rebuild and test with `make` if any `.c` source files in the current directory change:
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`{{ls *.c}} | entr '{{make && make test}}'`
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- Send a `SIGTERM` to any previously spawned ruby subprocesses before executing `ruby main.rb`:
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`{{ls *.rb}} | entr -r {{ruby main.rb}}`
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- Run a command with the changed file (`/_`) as an argument:
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`{{ls *.sql}} | entr {{psql -f}} /_`
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- [c]lear the screen and run a query after the SQL script is updated:
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`{{echo my.sql}} | entr -cp {{psql -f}} /_`
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- Rebuild the project if source files change, limiting output to the first few lines:
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`{{find src/}} | entr -s '{{make | sed 10q}}'`
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- Launch and auto-[r]eload a Node.js server:
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`{{ls *.js}} | entr -r {{node app.js}}`
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