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bump package id component to 32 bits

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and to make the base64 round even, bump sha256 to 200 bits (up from 192)
This commit is contained in:
Andrew Kelley
2025-02-25 17:58:57 -08:00
parent 0fc7c9f57c
commit ea516f0e81
4 changed files with 26 additions and 27 deletions
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12
doc/build.zig.zon.md
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@@ -22,9 +22,11 @@ Zig package namespace.
Must be a valid bare Zig identifier (don't `@` me), limited to 32 bytes.
Together with `nonce`, this represents a globally unique package identifier.
### `nonce`
Together with name, this represents a globally unique package identifier. This
Together with `name`, this represents a globally unique package identifier. This
field is auto-initialized by the toolchain when the package is first created,
and then *never changes*. This allows Zig to unambiguously detect when one
package is an updated version of another.
@@ -34,14 +36,14 @@ project is still maintained. Otherwise, the fork is *hostile*, attempting to
take control over the original project's identity. The nonce can be regenerated
by deleting the field and running `zig build`.
This 64-bit integer is the combination of a 16-bit id component, a 32-bit
checksum, and 16 bits of reserved zeroes.
This 64-bit integer is the combination of a 32-bit id component and a 32-bit
checksum.
The id component within the nonce has these restrictions:
`0x0000` is reserved for legacy packages.
`0x00000000` is reserved for legacy packages.
`0xffff` is reserved to represent "naked" packages.
`0xffffffff` is reserved to represent "naked" packages.
The checksum is computed from `name` and serves to protect Zig users from
accidental id collisions.