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29 lines
1000 B
Markdown
29 lines
1000 B
Markdown
# Replace Pattern Across Many Files In A Project
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Let's say I have a bunch of files in the `db/migrate` directory of my project
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that contain a line of text I'd like to update. I want to replace all
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occurrences of `t.bigint` with `t.integer`.
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First, I can get an idea of the scope of the change by listing out all the
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files and lines where this pattern exists using
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[`ripgrep`](https://github.com/BurntSushi/ripgrep).
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```bash
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$ rg 't.bigint' db/migrate
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```
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I can visually do a quick scan to make sure I'm not picking up results with my
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pattern that weren't intended.
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Then, I can include the `--files-with-matches` flag to limit the `ripgrep`
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output to just filenames. Those filenames can be piped to `sed` (via `xargs`)
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which will do the pattern replacement.
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```bash
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$ rg --files-with-matches 't.bigint' db/migrate | \
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xargs sed -i '' 's/t.bigint/t.integer/g'
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```
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This does an in-place (`-i ''`) edit of the files substituting (`s///g`)
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globally the occurrences of `t.bigint` for `t.integer`.
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