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lib.path: Make documentation more uniform
- Always have a trailing dot after sentences
- Link more things
- Fix some formatting
- Use `append` instead of `+ ("/"`
This commit is contained in:
Silvan Mosberger
parent
c72480119a
commit
b5c492b4ba
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@ -125,13 +125,13 @@ in /* No rec! Add dependencies on this file at the top. */ {
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Like `path + ("/" + string)` but safer, because it errors instead of returning potentially surprising results.
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More specifically, it checks that the first argument is a [path value type](https://nixos.org/manual/nix/stable/language/values.html#type-path"),
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and that the second argument is a valid subpath string (see `lib.path.subpath.isValid`).
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and that the second argument is a [valid subpath string](#function-library-lib.path.subpath.isValid).
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Laws:
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- Not influenced by subpath normalisation
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- Not influenced by subpath [normalisation](#function-library-lib.path.subpath.normalise):
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append p s == append p (subpath.normalise s)
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append p s == append p (subpath.normalise s)
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Type:
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append :: Path -> String -> Path
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@ -179,9 +179,9 @@ in /* No rec! Add dependencies on this file at the top. */ {
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Laws:
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- `hasPrefix p q` is only true if `q == append p s` for some subpath `s`.
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- `hasPrefix p q` is only true if [`q == append p s`](#function-library-lib.path.append) for some [subpath](#function-library-lib.path.subpath.isValid) `s`.
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- `hasPrefix` is a [non-strict partial order](https://en.wikipedia.org/wiki/Partially_ordered_set#Non-strict_partial_order) over the set of all path values
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- `hasPrefix` is a [non-strict partial order](https://en.wikipedia.org/wiki/Partially_ordered_set#Non-strict_partial_order) over the set of all path values.
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Type:
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hasPrefix :: Path -> Path -> Bool
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@ -220,11 +220,11 @@ in /* No rec! Add dependencies on this file at the top. */ {
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/*
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Remove the first path as a component-wise prefix from the second path.
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The result is a normalised subpath string, see `lib.path.subpath.normalise`.
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The result is a [normalised subpath string](#function-library-lib.path.subpath.normalise).
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Laws:
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- Inverts `append` for normalised subpaths:
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- Inverts [`append`](#function-library-lib.path.append) for [normalised subpath string](#function-library-lib.path.subpath.normalise):
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removePrefix p (append p s) == subpath.normalise s
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@ -322,13 +322,13 @@ in /* No rec! Add dependencies on this file at the top. */ {
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A subpath string points to a specific file or directory within an absolute base directory.
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It is a stricter form of a relative path that excludes `..` components, since those could escape the base directory.
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- The value is a string
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- The value is a string.
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- The string is not empty
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- The string is not empty.
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- The string doesn't start with a `/`
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- The string doesn't start with a `/`.
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- The string doesn't contain any `..` path components
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- The string doesn't contain any `..` path components.
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Type:
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subpath.isValid :: String -> Bool
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@ -368,11 +368,11 @@ in /* No rec! Add dependencies on this file at the top. */ {
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Like `concatStringsSep "/"` but safer, specifically:
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- All elements must be valid subpath strings, see `lib.path.subpath.isValid`
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- All elements must be [valid subpath strings](#function-library-lib.path.subpath.isValid).
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- The result gets normalised, see `lib.path.subpath.normalise`
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- The result gets [normalised](#function-library-lib.path.subpath.normalise).
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- The edge case of an empty list gets properly handled by returning the neutral subpath `"./."`
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- The edge case of an empty list gets properly handled by returning the neutral subpath `"./."`.
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Laws:
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@ -386,12 +386,12 @@ in /* No rec! Add dependencies on this file at the top. */ {
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subpath.join [ (subpath.normalise p) "./." ] == subpath.normalise p
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subpath.join [ "./." (subpath.normalise p) ] == subpath.normalise p
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- Normalisation - the result is normalised according to `lib.path.subpath.normalise`:
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- Normalisation - the result is [normalised](#function-library-lib.path.subpath.normalise):
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subpath.join ps == subpath.normalise (subpath.join ps)
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- For non-empty lists, the implementation is equivalent to normalising the result of `concatStringsSep "/"`.
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Note that the above laws can be derived from this one.
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- For non-empty lists, the implementation is equivalent to [normalising](#function-library-lib.path.subpath.normalise) the result of `concatStringsSep "/"`.
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Note that the above laws can be derived from this one:
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ps != [] -> subpath.join ps == subpath.normalise (concatStringsSep "/" ps)
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@ -441,7 +441,7 @@ in /* No rec! Add dependencies on this file at the top. */ {
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/*
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Split [a subpath](#function-library-lib.path.subpath.isValid) into its path component strings.
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Throw an error if the subpath isn't valid.
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Note that the returned path components are also valid subpath strings, though they are intentionally not [normalised](#function-library-lib.path.subpath.normalise).
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Note that the returned path components are also [valid subpath strings](#function-library-lib.path.subpath.isValid), though they are intentionally not [normalised](#function-library-lib.path.subpath.normalise).
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Laws:
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@ -469,16 +469,15 @@ in /* No rec! Add dependencies on this file at the top. */ {
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${subpathInvalidReason subpath}'';
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splitRelPath subpath;
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/* Normalise a subpath. Throw an error if the subpath isn't valid, see
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`lib.path.subpath.isValid`
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/* Normalise a subpath. Throw an error if the subpath isn't [valid](#function-library-lib.path.subpath.isValid).
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- Limit repeating `/` to a single one
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- Limit repeating `/` to a single one.
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- Remove redundant `.` components
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- Remove redundant `.` components.
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- Remove trailing `/` and `/.`
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- Remove trailing `/` and `/.`.
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- Add leading `./`
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- Add leading `./`.
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Laws:
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@ -490,15 +489,15 @@ in /* No rec! Add dependencies on this file at the top. */ {
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subpath.normalise p != subpath.normalise q -> $(realpath ${p}) != $(realpath ${q})
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- Don't change the result when appended to a Nix path value:
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- Don't change the result when [appended](#function-library-lib.path.append) to a Nix path value:
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base + ("/" + p) == base + ("/" + subpath.normalise p)
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append base p == append base (subpath.normalise p)
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- Don't change the path according to `realpath`:
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$(realpath ${p}) == $(realpath ${subpath.normalise p})
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- Only error on invalid subpaths:
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- Only error on [invalid subpaths](#function-library-lib.path.subpath.isValid):
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builtins.tryEval (subpath.normalise p)).success == subpath.isValid p
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