pkgs/README.md: Clarify versioning on projects lacking proper releases

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OPNA2608 2024-01-11 17:40:24 +01:00
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@ -354,6 +354,10 @@ There are a few naming guidelines:
Example: Given a project had its latest releases `2.2` in November 2021, and `3.0` in January 2022, a commit authored on March 15, 2022 for an upcoming bugfix release `2.2.1` would have `version = "2.2-unstable-2022-03-15"`.
- If a project has no suitable preceding releases - e.g., no versions at all, or an incompatible versioning / tagging schema - then the latest upstream version in the above schema should be `0`.
Example: Given a project that has no tags / released versions at all, or applies versionless tags like `latest` or `YYYY-MM-DD-Build`, a commit authored on March 15, 2022 would have `version = "0-unstable-2022-03-15"`.
- Dashes in the package `pname` _should_ be preserved in new variable names, rather than converted to underscores or camel cased — e.g., `http-parser` instead of `http_parser` or `httpParser`. The hyphenated style is preferred in all three package names.
- If there are multiple versions of a package, this _should_ be reflected in the variable names in `all-packages.nix`, e.g. `json-c_0_9` and `json-c_0_11`. If there is an obvious “default” version, make an attribute like `json-c = json-c_0_9;`. See also [versioning][versioning].