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Use gocondense to condense selected Go source constructs—not to minify binaries. The project describes it as a formatter that moves suitable multiline constructs onto single lines while observing a line-length limit. For a safe rollout, start with a clean working tree, format a small scope, review the diff, and run your project’s checks before expanding its use.
What gocondense changes—and what it does not
gocondense targets vertical space in Go source files. Depending on the construct and configured line-length limit, it can condense multiline function signatures, calls, expressions, generic instantiations, single-item declaration groups, same-type parameter or result declarations, and other selected formatting patterns. It can also remove redundant parentheses, blank lines, and empty blocks.
This is source formatting, not a general-purpose binary minifier. The available project documentation does not establish that using gocondense reduces compiled executable size, improves runtime performance, or changes build output size.
What the project says about safety
The gocondense README states: “All transformations are line-length aware (default 80 columns), idempotent, and preserve all comments.” These are claims made by the project; they are not an independent proof that every possible input is semantically equivalent after formatting. Idempotence means the project says applying the formatter repeatedly should not keep changing the output.
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Review comments with particular care because Go uses comments for meaningful directives. For example, build constraints are comments near the beginning of source files that the Go command evaluates to decide whether a file applies to a build. Check those directives and any other special comments in the resulting diff, then test the configurations your project supports.
gocondense is an additional formatting choice alongside gofmt. Go’s documentation notes that gofmt also reformats doc comments into canonical form. Consider how gocondense fits your team’s formatter conventions and review process before introducing it to shared code.
Set the line-length limit
The default maximum line length is 80 columns. By default, tabs count as four spaces in that calculation. The command-line options --max-len and --tab-width let you configure those values; the library exposes corresponding MaxLen and TabWidth settings. Choose settings that match your repository’s conventions rather than assuming every line will fit a fixed width.
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Install and run the CLI
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Install the command with Go’s package tooling:
go install github.com/abemedia/gocondense/cmd/gocondense@latest.Special offer. See more information about Outbyte and uninstall instructions. Please review EULA and Privacy policy. -
Choose a narrow initial scope, such as one representative Go file or directory. The CLI accepts file paths, directories, recursive patterns such as
./..., and standard input. -
Run gocondense on the selected file or directory. File arguments are modified in place, so make sure your changes are committed or otherwise safely recoverable before running it.
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Inspect the source diff, paying attention to comments, build constraints, and formatting changes that could make code harder for your team to read.
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Run the project’s normal formatting checks, tests, and builds for relevant build tags, platforms, or configurations before widening the scope.
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When processing paths, the CLI skips generated files, vendor, testdata, and paths covered by ignore directives in go.mod, unless those paths are explicitly passed. Check what was included in the diff rather than assuming a broad path pattern processed every Go file.
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Adopt it through a reviewable workflow
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Begin with a clean working tree so formatter changes are easy to distinguish from ongoing work.
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Apply gocondense to a small, representative scope. Include the kinds of code and build configurations your team actually maintains.
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Review the diff as a source change, not merely as cosmetic output. Check comments and directives, and confirm the condensed layout remains readable under your conventions.
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Run the checks your repository normally requires, including tests and builds for relevant configurations. A passing check is useful evidence, not a guarantee that every transformation is safe for every use case.
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Only after review should you expand the scope or make gocondense part of a repeatable editor or CI workflow.
Choose the CLI or the Go library
| Approach | How it fits | Output and review |
|---|---|---|
| CLI or editor integration | Use the command for manual runs or integrate it with an editor. Project documentation describes setup for VS Code, GoLand, Vim, and Neovim. | CLI file arguments are changed in place. Review the resulting source diff and run repository checks. |
| Go library | Call gocondense from Go code when formatting belongs in an application or other programmatic workflow. | The documented API includes Source, New, Config, and Formatter.Source; it returns formatted output together with an error, allowing the calling code to decide how to inspect or apply the result. |
The project documentation and API reference are available in the gocondense repository and on pkg.go.dev. For Go’s handling of comments and build constraints, see the gofmt documentation and Go command documentation.
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