sneak
7e1b010c4f
The dataset is vendored as blogs.json and compiled in with go:embed, so the package does no network I/O on any code path. FetchBlogs is removed rather than kept as a no-op wrapper, since nothing is fetched any more: GetBlogs decodes the embedded bytes on first call and memoizes the result, and RandomBlog, RandomBlogs and NthBlog go through it. Callers of FetchBlogs have to switch to GetBlogs. make update-data refreshes the vendored copy from the BlogsURL constant, downloading to a temporary file and replacing blogs.json only once that file parses as a non-empty JSON array of blog entries, so a complete-but-wrong response cannot overwrite the good dataset. A test walks the dependency graph of the non-test build and fails if any net/* package is reachable. Model: opus-5
50 lines
1.5 KiB
Markdown
50 lines
1.5 KiB
Markdown
# hnblogs
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A Go library for the [blogs.hn](https://blogs.hn) dataset: a list of personal
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blogs collected from Hacker News.
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```go
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import "sneak.berlin/go/hnblogs"
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blog, err := hnblogs.RandomBlog()
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```
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## Embedded data
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The dataset is vendored into this repository as `blogs.json` and compiled into
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the package with `go:embed`. The library performs no network I/O: importing it
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does not reach out to anything, results do not change under a caller between
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runs of the same build, and `go test` works offline.
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`GetBlogs` decodes the embedded bytes on first call and memoizes the result;
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every other accessor goes through it. Its error return is only reachable if the
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committed `blogs.json` is malformed.
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The trade-off is that the dataset is a build-time artifact: it is roughly 8 MB
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of JSON, it lands in every binary that links the package, and it is only as
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fresh as the last commit that refreshed it.
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## Refreshing the dataset
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```sh
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make update-data
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```
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That target reads the upstream location from the `BlogsURL` constant in
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`hnblogs.go` — the single source of truth — and downloads it to a temporary
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file. It replaces `blogs.json` only once that file parses as a non-empty JSON
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array of blog entries, so a response that arrives complete but is not the
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dataset leaves the vendored copy untouched. It then runs the test suite
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against the new data. Requires `curl` and `jq`. Commit the resulting
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`blogs.json` to publish the update.
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## Development
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```sh
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make test
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make lint
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make docker
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```
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`make docker` runs lint and tests in containers.
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