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Pubspec parser clean-up and tweaks. #2215

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2307d99
Pubspec-parser clean-up and tweaks.
lrhn Oct 20, 2025
419e3f4
Address comments.
lrhn Dec 17, 2025
4c8529f
Make `_readString` be a switch
lrhn Dec 17, 2025
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127 changes: 63 additions & 64 deletions pkgs/pubspec_parse/lib/src/dependency.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,6 @@
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.

import 'package:collection/collection.dart';
import 'package:json_annotation/json_annotation.dart';
import 'package:pub_semver/pub_semver.dart';
import 'package:yaml/yaml.dart';
Expand Down Expand Up @@ -46,18 +45,24 @@ Dependency? _fromJson(Object? data, String name) {
}

if (data is Map) {
final matchedKeys = data.keys
.cast<String>()
.where((key) => key != 'version')
.toList();
String? matchedKey;
String? secondMatchedKey;
String? firstUnrecognizedKey;
for (final (key as String) in data.keys) {
if (key == 'version') continue;
if (matchedKey == null) {
matchedKey = key;
} else {
secondMatchedKey ??= key;
}
if (!_sourceKeys.contains(key)) {
firstUnrecognizedKey ??= key;
}
}

if (data.isEmpty || (matchedKeys.isEmpty && data.containsKey('version'))) {
if (matchedKey == null) {
return _$HostedDependencyFromJson(data);
} else {
final firstUnrecognizedKey = matchedKeys.firstWhereOrNull(
(k) => !_sourceKeys.contains(k),
);

return $checkedNew<Dependency>('Dependency', data, () {
if (firstUnrecognizedKey != null) {
throw UnrecognizedKeysException(
Expand All @@ -66,20 +71,18 @@ Dependency? _fromJson(Object? data, String name) {
_sourceKeys,
);
}
if (matchedKeys.length > 1) {
if (secondMatchedKey != null) {
throw CheckedFromJsonException(
data,
matchedKeys[1],
secondMatchedKey,
'Dependency',
'A dependency may only have one source.',
);
}

final key = matchedKeys.single;

return switch (key) {
'git' => GitDependency.fromData(data[key]),
'path' => PathDependency.fromData(data[key]),
return switch (matchedKey) {
'git' => GitDependency.fromData(data[matchedKey]),
'path' => PathDependency.fromData(data[matchedKey]),
'sdk' => _$SdkDependencyFromJson(data),
'hosted' => _$HostedDependencyFromJson(
data,
Expand Down Expand Up @@ -125,17 +128,8 @@ class GitDependency extends Dependency {

GitDependency(this.url, {this.ref, this.path});

factory GitDependency.fromData(Object? data) {
if (data is String) {
data = {'url': data};
}

if (data is Map) {
return _$GitDependencyFromJson(data);
}

throw ArgumentError.value(data, 'git', 'Must be a String or a Map.');
}
factory GitDependency.fromData(Object? data) =>
_$GitDependencyFromJson(_mapOrStringUri(data, 'git'));

@override
bool operator ==(Object other) =>
Expand All @@ -156,34 +150,37 @@ Uri? parseGitUriOrNull(String? value) =>

Uri parseGitUri(String value) => _tryParseScpUri(value) ?? Uri.parse(value);

/// Supports URIs like `[user@]host.xz:path/to/repo.git/`
/// Parses URIs like `[user@]host.xz:path/to/repo.git/`.
/// See https://git-scm.com/docs/git-clone#_git_urls_a_id_urls_a
Uri? _tryParseScpUri(String value) {
final colonIndex = value.indexOf(':');

if (colonIndex < 0) {
return null;
} else if (colonIndex == value.indexOf('://')) {
// If the first colon is part of a scheme, it's not an scp-like URI
return null;
}
final slashIndex = value.indexOf('/');

if (slashIndex >= 0 && slashIndex < colonIndex) {
// Per docs: This syntax is only recognized if there are no slashes before
// the first colon. This helps differentiate a local path that contains a
// colon. For example the local path foo:bar could be specified as an
// absolute path or ./foo:bar to avoid being misinterpreted as an ssh url.
return null;
}

final atIndex = value.indexOf('@');
if (colonIndex > atIndex) {
final user = atIndex >= 0 ? value.substring(0, atIndex) : null;
final host = value.substring(atIndex + 1, colonIndex);
final path = value.substring(colonIndex + 1);
return Uri(scheme: 'ssh', userInfo: user, host: host, path: path);
// Find first `:`. Remember `@` before it, reject if `/` before it.
const slashChar = 0x2F, colonChar = 0x3A, atChar = 0x40;
var atIndex = -1;
for (var i = 0; i < value.length; i++) {
final char = value.codeUnitAt(i);
if (char == slashChar) {
// Per docs: This syntax is only recognized if there are no slashes
// before the first colon. This helps differentiate a local path that
// contains a colon. For example the local path foo:bar could
// be specified as an absolute path or ./foo:bar to avoid being
// misinterpreted as an SSH URL
break;
} else if (char == atChar) {
atIndex = i;
} else if (char == colonChar) {
final colonIndex = i;

// Assume a `://` means it's a real URI scheme and authority,
// not an SCP-like URI.
if (value.startsWith('//', colonIndex + 1)) return null;

final user = atIndex >= 0 ? value.substring(0, atIndex) : null;
final host = value.substring(atIndex + 1, colonIndex);
final path = value.substring(colonIndex + 1);
return Uri(scheme: 'ssh', userInfo: user, host: host, path: path);
}
}
// No colon in value, or not before a slash.
return null;
}

Expand Down Expand Up @@ -257,17 +254,8 @@ class HostedDetails {

HostedDetails(this.declaredName, this.url);

factory HostedDetails.fromJson(Object data) {
if (data is String) {
data = {'url': data};
}

if (data is Map) {
return _$HostedDetailsFromJson(data);
}

throw ArgumentError.value(data, 'hosted', 'Must be a Map or String.');
}
factory HostedDetails.fromJson(Object data) =>
_$HostedDetailsFromJson(_mapOrStringUri(data, 'hosted'));

@override
bool operator ==(Object other) =>
Expand All @@ -279,3 +267,14 @@ class HostedDetails {

VersionConstraint _constraintFromString(String? input) =>
input == null ? VersionConstraint.any : VersionConstraint.parse(input);

/// The `value` if it is a `Map`, or `{'url': value}` if `calue` is a `String`.
///
/// The `value` must be iether a map or a string.
/// The [name] is used as the parameter name in an error if the value
/// is not one of the allowed types.
Map _mapOrStringUri(Object? value, String name) => switch (value) {
Map() => value,
String() => {'url': value},
_ => throw ArgumentError.value(value, name, 'Must be a String or a Map.'),
};
118 changes: 57 additions & 61 deletions pkgs/pubspec_parse/lib/src/pubspec.dart
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Original file line number Diff line number Diff line change
Expand Up @@ -60,7 +60,7 @@ class Pubspec {
@Deprecated('See https://dart.dev/tools/pub/pubspec#authorauthors')
String? get author {
if (authors.length == 1) {
return authors.single;
return authors.first;
}
return null;
}
Expand Down Expand Up @@ -140,9 +140,9 @@ class Pubspec {
throw ArgumentError.value(name, 'name', '"name" cannot be empty.');
}

if (publishTo != null && publishTo != 'none') {
if (publishTo case final publishTo? when publishTo != 'none') {
try {
final targetUri = Uri.parse(publishTo!);
final targetUri = Uri.parse(publishTo);
if (!(targetUri.isScheme('http') || targetUri.isScheme('https'))) {
throw const FormatException('Must be an http or https URL.');
}
Expand All @@ -160,10 +160,10 @@ class Pubspec {
return _$PubspecFromJson(json);
} on CheckedFromJsonException catch (e) {
if (e.map == json && json.containsKey(e.key)) {
json = Map.from(json)..remove(e.key);
continue;
json = {...json}..remove(e.key);
} else {
rethrow;
}
rethrow;
}
}
}
Expand All @@ -183,67 +183,63 @@ class Pubspec {
);

static List<String> _normalizeAuthors(String? author, List<String>? authors) {
final value = <String>{if (author != null) author, ...?authors};
return value.toList();
if (author == null) return authors ?? const [];
return [
author,
if (authors != null)
for (var otherAuthor in authors)
if (author != otherAuthor) otherAuthor,
];
}
Comment on lines 185 to 193
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@gemini-code-assist gemini-code-assist bot Oct 20, 2025

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high

The new implementation of _normalizeAuthors no longer removes duplicate entries within the authors list itself, and also doesn't remove duplicates if author is null. The previous implementation used a Set, which correctly handled all duplicates. The constructor comment for Pubspec also states that duplicates are eliminated. This change is an unintended regression.

For example, if authors is ['a', 'a'] and author is null, the old implementation would return ['a'], while the new one returns ['a', 'a'].

To preserve the old behavior of removing all duplicates, it's best to use a Set as before.

  static List<String> _normalizeAuthors(String? author, List<String>? authors) {
    final value = <String>{if (author != null) author, ...?authors};
    return value.toList();
  }

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@lrhn lrhn Oct 20, 2025

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Correctly spotted. Is this something we care about?
(There is no test which fails, so clearly not.)

Are we normalizing for our own sake, or for the user's, if they pass in a list with duplicate authors.

And Gemini, you can write that entire body as => [...{?author, ...?authors}];.

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@natebosch natebosch Oct 21, 2025

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I doubt deduplication within authors is an intended feature and I don't think it's likely to come up in practice. I'd be happy with either using this version, or restoring the deduplicating behavior and adding a test. I think you're already handling the important name to dedupe.

}

Version? _versionFromString(String? input) =>
input == null ? null : Version.parse(input);

Map<String, VersionConstraint?> _environmentMap(Map? source) =>
source?.map((k, value) {
final key = k as String;
if (key == 'dart') {
// github.com/dart-lang/pub/blob/d84173eeb03c3/lib/src/pubspec.dart#L342
// 'dart' is not allowed as a key!
throw CheckedFromJsonException(
source,
'dart',
'VersionConstraint',
'Use "sdk" to for Dart SDK constraints.',
badKey: true,
);
}

VersionConstraint? constraint;
if (value == null) {
constraint = null;
} else if (value is String) {
try {
constraint = VersionConstraint.parse(value);
} on FormatException catch (e) {
throw CheckedFromJsonException(source, key, 'Pubspec', e.message);
}
Map<String, VersionConstraint?> _environmentMap(Map? source) {
if (source == null) return {};
return source.map((k, value) {
final key = k as String;
if (key == 'dart') {
// github.com/dart-lang/pub/blob/d84173eeb03c3/lib/src/pubspec.dart#L342
// 'dart' is not allowed as a key!
throw CheckedFromJsonException(
source,
'dart',
'VersionConstraint',
'Use "sdk" to for Dart SDK constraints.',
badKey: true,
);
}

return MapEntry(key, constraint);
} else {
throw CheckedFromJsonException(
source,
key,
'VersionConstraint',
'`$value` is not a String.',
);
VersionConstraint? constraint;
if (value is String) {
try {
constraint = VersionConstraint.parse(value);
} on FormatException catch (e) {
throw CheckedFromJsonException(source, key, 'Pubspec', e.message);
}
} else if (value != null) {
throw CheckedFromJsonException(
source,
key,
'VersionConstraint',
'`$value` is not a String.',
);
}
return MapEntry(key, constraint);
});
}

return MapEntry(key, constraint);
}) ??
{};

Map<String, String?> _executablesMap(Map? source) =>
source?.map((k, value) {
final key = k as String;
if (value == null) {
return MapEntry(key, null);
} else if (value is String) {
return MapEntry(key, value);
} else {
throw CheckedFromJsonException(
source,
key,
'String',
'`$value` is not a String.',
);
}
}) ??
{};
Map<String, String?> _executablesMap(Map? source) => {
if (source != null)
for (final MapEntry(:key as String, :value) in source.entries)
key: (value is String?)
? value
: (throw CheckedFromJsonException(
source,
key,
'String',
'`$value` is not a String.',
)),
};
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