<html><head><meta http-equiv="Content-Type" content="text/html charset=utf-8"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space;" class=""><div class="">Hi</div>Thanks for the proposal, looks very nice.<div class=""><br class=""></div><div class="">The <b class="">Package.swift</b> manifest files is very string typed already, (package name, url, target names, etc) and and think that is ok in our case.</div><div class=""><br class=""></div><div class="">We can make a type for external dependency that would have 2 properties: package and target.</div><div class="">That could help expressing a External dependency. <br class=""><div class=""><br class=""></div><div class="">3. Target(name: "FooLibrary", dependencies: ["FooCore", External(package: “SomePackage”, target: "ExternalTarget"])<br class="">or</div><div class="">2. Target(name: "FooLibrary", dependencies: ["FooCore"], externalDependencies: Dependency(package: “SomePackage”, target: "ExternalTarget”])<br class=""><br class="">Idea: </div><div class="">- How about making 2 types of targets in the Package, public and private</div><div class=""><br class=""></div><div class=""><pre class="rich-diff-level-one" style="box-sizing: border-box; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; margin-top: 0px; margin-bottom: 16px; line-height: 1.45; word-wrap: normal; padding: 10px 20px; overflow: auto; background-color: rgb(247, 247, 247); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; margin-left: 15px; color: rgb(51, 51, 51);"><span class="pl-k" style="box-sizing: border-box; color: rgb(167, 29, 93);">import</span> <span class="pl-c1" style="box-sizing: border-box; color: rgb(0, 134, 179);">PackageDescription</span>
<span class="pl-k" style="box-sizing: border-box; color: rgb(167, 29, 93);">let</span> package <span class="pl-k" style="box-sizing: border-box; color: rgb(167, 29, 93);">=</span> Package(
name: <span class="pl-s" style="box-sizing: border-box; color: rgb(24, 54, 145);"><span class="pl-pds" style="box-sizing: border-box;">"</span>FooLibrary<span class="pl-pds" style="box-sizing: border-box;">"</span></span>,
targets: [
Target(name: <span class="pl-s" style="box-sizing: border-box; color: rgb(24, 54, 145);"><span class="pl-pds" style="box-sizing: border-box;">"</span>FooLibrary<span class="pl-pds" style="box-sizing: border-box;">”</span></span>),
privateTargets: [
<span class="Apple-tab-span" style="white-space:pre"> </span>Target(name: <span class="pl-s" style="box-sizing: border-box; color: rgb(24, 54, 145);"><span class="pl-pds" style="box-sizing: border-box;">"</span>SampleCLI<span class="pl-pds" style="box-sizing: border-box;">”</span></span>)
])</pre><div>By keeping private and public targets separate it would be easier for package author to organise them and don’t mix theirs dependencies, like in the example below</div><div><pre style="box-sizing: border-box; font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; margin-top: 0px; margin-bottom: 0px; line-height: 1.45; word-wrap: normal; padding: 16px; overflow: auto; background-color: rgb(247, 247, 247); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; word-break: normal; color: rgb(51, 51, 51);" class=""> Target(name: <span class="pl-s" style="box-sizing: border-box; color: rgb(24, 54, 145);"><span class="pl-pds" style="box-sizing: border-box;">"</span>FooLibrary<span class="pl-pds" style="box-sizing: border-box;">"</span></span>, dependencies: [<span class="pl-s" style="box-sizing: border-box; color: rgb(24, 54, 145);"><span class="pl-pds" style="box-sizing: border-box;">"</span>FooCore<span class="pl-pds" style="box-sizing: border-box;">"</span></span>]), <span class="pl-c" style="box-sizing: border-box; color: rgb(150, 152, 150);">// Error FooCore is private.</span>
</pre><div class=""><br class=""></div></div><div>Thanks</div><div>- Kostiantyn</div><div><br class=""><blockquote type="cite" class=""><div class="">On 07 Jul 2016, at 20:45, Ankit Agarwal via swift-build-dev <<a href="mailto:swift-build-dev@swift.org" class="">swift-build-dev@swift.org</a>> wrote:</div><br class="Apple-interchange-newline"><div class=""><div dir="ltr" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;" class="">Hi,<div class=""><br class=""></div><div class="">Thanks for feedback. I agree that specifying external dependencies with targets would be great.</div><div class="">I think the only thing issue is to figure out is how to specify them. Some thoughts: </div><div class=""><br class=""></div><div class="">Note: Currently target name has to be unique across all the targets in the package (including its dependencies).</div><div class=""><br class=""></div><div class="">1. Target(name: "FooLibrary", dependencies: ["FooCore", "ExternalTarget"])</div><div class=""><br class=""></div><div class="">pro: This is probably the easiest way to specify the external dependency it. It fits perfectly into the current semantics and just needs to be implemented for external deps.</div><div class="">con: No way to know which targets are external dependencies by just looking at manifest file. No way to know from which package that dep is coming from.</div><div class=""><br class=""></div><div class="">2. Target(name: "FooLibrary", dependencies: ["FooCore"], externalDependencies: ["ExternalTarget"])</div><div class=""><br class=""></div><div class="">pro: Explicitly mentions what all external deps the target relies on.</div><div class="">con: Doesn't mention which package contains that external dep.</div><div class=""><br class=""></div><div class="">3. Target(name: "FooLibrary", dependencies: ["FooCore", "SomePackage.ExternalTarget"])</div><div class=""><br class=""></div><div class="">pro: Mentions which package + target the external dependency belongs to.</div><div class="">con: is probably too verbose and stringly typed.</div><div class=""><br class=""></div><div class="">4. Target(name: "FooLibrary", dependencies: ["FooCore"], externalDependencies: [("SomePackage", "ExternalTarget")])</div><div class=""><br class=""></div><div class="">pro: Mentions which package + target the external dependency belongs to.</div><div class="">con: verbose and stringly typed.</div><div class=""><br class=""></div><div class="">Would love some feedback or another way to better express the external deps, will update the proposal then.</div><div class=""><br class=""></div><div class="">Thanks!</div></div><div class="gmail_extra" style="font-family: Helvetica; font-size: 12px; font-style: normal; font-variant-caps: normal; font-weight: normal; letter-spacing: normal; orphans: auto; text-align: start; text-indent: 0px; text-transform: none; white-space: normal; widows: auto; word-spacing: 0px; -webkit-text-stroke-width: 0px;"><br class=""><div class="gmail_quote">On Thu, Jul 7, 2016 at 9:35 PM, Anders Bertelrud<span class="Apple-converted-space"> </span><span dir="ltr" class=""><<a href="mailto:anders@apple.com" target="_blank" class="">anders@apple.com</a>></span><span class="Apple-converted-space"> </span>wrote:<br class=""><blockquote class="gmail_quote" style="margin: 0px 0px 0px 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex;"><div style="word-wrap: break-word;" class="">Hello Ankit,<div class=""><br class=""></div><div class="">Thanks a lot for taking the initiative for this! This looks like a great start.</div><div class=""><br class=""></div><div class="">I think what we will eventually want to do is to let package authors express the "role" of each target, which would then allow expression of such things as build-time vs run-time dependencies. For example, in some cases there may be a dependency on a build tool (that generates code or formats resources in some way) and that affects such things as the platform and architectures for which the target should be built.</div><div class=""><br class=""></div><div class="">But that can all be added in the future. I like the direction represented by this proposal, and I think it represents a good improvement on its own. I do agree with other comments that it would be a great addition to let dependencies be specified at the target level, not just the package level. That would be in scope for inclusion in this proposal.</div><div class=""><br class=""></div><div class="">Thanks!</div><div class=""><br class=""></div><div class="">Anders</div><div class=""><br class=""><div class=""><blockquote type="cite" class=""><div class=""><div class="h5"><div class="">On 2016-07-07, at 05.26, Ankit Agarwal via swift-build-dev <<a href="mailto:swift-build-dev@swift.org" target="_blank" class="">swift-build-dev@swift.org</a>> wrote:</div><br class=""></div></div><div class=""><div class=""><div class="h5"><div dir="ltr" class=""><div class="">Hi swift packagers,</div><div class=""><br class=""></div><div class="">I am proposing access control to package targets. </div><div class=""><br class=""></div>Link:<span class="Apple-converted-space"> </span><a href="https://github.com/aciidb0mb3r/swift-evolution/blob/swiftpm-module-access-control/proposals/xxxx-swiftpm-target-access-control.md" target="_blank" class="">https://github.com/aciidb0mb3r/swift-evolution/blob/swiftpm-module-access-control/proposals/xxxx-swiftpm-target-access-control.md</a><br clear="all" class=""><div class=""><br class=""></div><div class="">Feedback appreciated!</div><div class=""><br class=""></div><div class=""><h1 style="font-size: 2.25em; margin-right: 0px; margin-bottom: 16px; margin-left: 0px; line-height: 1.2; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: rgb(238, 238, 238); color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; margin-top: 0px !important;" class="">SwiftPM Target Access Control</h1><ul style="padding-left: 2em; margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class=""><li class="">Proposal: <a href="https://github.com/apple/swift-evolution/blob/master/proposals/xxxx-swiftpm-target-access-control.md" target="_blank" style="background-color: transparent; color: rgb(64, 120, 192); text-decoration: none;" class="">SE-XXXX</a></li><li class="">Author: <a href="https://github.com/aciidb0mb3r" target="_blank" style="background-color: transparent; color: rgb(64, 120, 192); text-decoration: none;" class="">Ankit Aggarwal</a></li><li class="">Status: <span class="">In Discussion</span></li><li class="">Review manager: TBD</li></ul><h2 style="margin-top: 1em; margin-bottom: 16px; line-height: 1.225; font-size: 1.75em; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: rgb(238, 238, 238); color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';" class=""><a href="https://github.com/aciidb0mb3r/swift-evolution/tree/swiftpm-module-access-control#introduction" target="_blank" style="background-color: transparent; color: rgb(64, 120, 192); text-decoration: none; display: inline-block; padding-right: 2px; line-height: 1;" class=""></a>Introduction</h2><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">This proposal aims to address two issues:</p><ol style="padding-left: 2em; margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class=""><li class=""><p style="margin-top: 16px; margin-bottom: 16px;" class="">Control over the targets exposed (and built) when a SwiftPM package is used as a dependency.</p></li><li class=""><p style="margin-top: 16px; margin-bottom: 16px;" class="">Import (and build) selected targets of a dependency.</p></li></ol><h2 style="margin-top: 1em; margin-bottom: 16px; line-height: 1.225; font-size: 1.75em; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: rgb(238, 238, 238); color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';" class=""><a href="https://github.com/aciidb0mb3r/swift-evolution/tree/swiftpm-module-access-control#motivation" target="_blank" style="background-color: transparent; color: rgb(64, 120, 192); text-decoration: none; display: inline-block; padding-right: 2px; line-height: 1;" class=""></a>Motivation</h2><h4 style="margin-top: 1em; margin-bottom: 16px; line-height: 1.4; font-size: 1.25em; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';" class=""><a href="https://github.com/aciidb0mb3r/swift-evolution/tree/swiftpm-module-access-control#1-control-over-exposed-targets" target="_blank" style="background-color: transparent; color: rgb(64, 120, 192); text-decoration: none; display: inline-block; padding-right: 2px; line-height: 1.2;" class=""></a>1. Control over exposed targets:</h4><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">SwiftPM allows multiple targets (or modules) inside a package. Packages usually contain sample usage or example targets which are useful during development or testing of the package but are redundant when the package is used as a dependency. This increases compile time for the user of the package.</p><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">As a concrete example: Vapor has a target called <a href="https://github.com/qutheory/vapor/tree/master/Sources/Development" target="_blank" style="background-color: transparent; color: rgb(64, 120, 192); text-decoration: none;" class=""><code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">Development</code></a>.</p><h4 style="margin-top: 1em; margin-bottom: 16px; line-height: 1.4; font-size: 1.25em; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';" class=""><a href="https://github.com/aciidb0mb3r/swift-evolution/tree/swiftpm-module-access-control#2-import-selected-targets" target="_blank" style="background-color: transparent; color: rgb(64, 120, 192); text-decoration: none; display: inline-block; padding-right: 2px; line-height: 1.2;" class=""></a>2. Import selected targets:</h4><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">Sometimes user of a package is only interested in few targets of a dependency instead of all the targets. Currently there is no way to state this in <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">Package.swift</code> and all the targets are implicitly built and exposed to the user package.</p><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">For e.g.: I would like to use the targets <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">libc</code>, <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">POSIX</code>, <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">Basic</code> of SwiftPM but don't want other targets to be built or exposed in my package.</p><h2 style="margin-top: 1em; margin-bottom: 16px; line-height: 1.225; font-size: 1.75em; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: rgb(238, 238, 238); color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';" class=""><a href="https://github.com/aciidb0mb3r/swift-evolution/tree/swiftpm-module-access-control#proposed-solution" target="_blank" style="background-color: transparent; color: rgb(64, 120, 192); text-decoration: none; display: inline-block; padding-right: 2px; line-height: 1;" class=""></a>Proposed Solution</h2><h4 style="margin-top: 1em; margin-bottom: 16px; line-height: 1.4; font-size: 1.25em; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';" class=""><a href="https://github.com/aciidb0mb3r/swift-evolution/tree/swiftpm-module-access-control#1-control-over-exposed-targets-1" target="_blank" style="background-color: transparent; color: rgb(64, 120, 192); text-decoration: none; display: inline-block; padding-right: 2px; line-height: 1.2;" class=""></a>1. Control over exposed targets:</h4><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">I propose that package authors be able mark the targets they don't want to be exposed as <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">private</code> i.e. the <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">private</code>targets will be built when that package is root package but not when the package is used as a dependency.</p><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">To mark a target as <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">private</code> I propose <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">PackageDescription</code>'s <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">Target</code> gains a <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">isPrivate</code> boolean property which defaults to <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">false</code>.</p><h4 style="margin-top: 1em; margin-bottom: 16px; line-height: 1.4; font-size: 1.25em; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';" class=""><a href="https://github.com/aciidb0mb3r/swift-evolution/tree/swiftpm-module-access-control#2-import-selected-targets-1" target="_blank" style="background-color: transparent; color: rgb(64, 120, 192); text-decoration: none; display: inline-block; padding-right: 2px; line-height: 1.2;" class=""></a>2. Import selected targets:</h4><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">I propose that package user be able to specify the targets they want to import into their package.</p><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">To specify the targets to be import I propose to add an optional string array property <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">targets</code> in <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">PackageDescription</code>'s <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">Package.Dependency</code> which defaults to <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">nil</code> i.e. all targets.</p><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">Instead of an optional string array property an enum can also be used:</p><div style="margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class=""><pre style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; margin-top: 0px; margin-bottom: 0px; line-height: 1.45; word-wrap: normal; padding: 16px; overflow: auto; background-color: rgb(247, 247, 247); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class=""><span style="color: rgb(167, 29, 93);" class="">enum</span> ImportedTargets {
<span style="color: rgb(167, 29, 93);" class="">case</span> allTargets <span style="color: rgb(150, 152, 150);" class="">// Import all the targets, default value.</span>
<span style="color: rgb(167, 29, 93);" class="">case</span> targets([<span style="color: rgb(0, 134, 179);" class="">String</span>]) <span style="color: rgb(150, 152, 150);" class="">// Import only these targets.</span>
}</pre></div><h2 style="margin-top: 1em; margin-bottom: 16px; line-height: 1.225; font-size: 1.75em; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: rgb(238, 238, 238); color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';" class=""><a href="https://github.com/aciidb0mb3r/swift-evolution/tree/swiftpm-module-access-control#detailed-design" target="_blank" style="background-color: transparent; color: rgb(64, 120, 192); text-decoration: none; display: inline-block; padding-right: 2px; line-height: 1;" class=""></a>Detailed Design</h2><h4 style="margin-top: 1em; margin-bottom: 16px; line-height: 1.4; font-size: 1.25em; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';" class=""><a href="https://github.com/aciidb0mb3r/swift-evolution/tree/swiftpm-module-access-control#1-control-over-exposed-targets-2" target="_blank" style="background-color: transparent; color: rgb(64, 120, 192); text-decoration: none; display: inline-block; padding-right: 2px; line-height: 1.2;" class=""></a>1. Control over exposed targets:</h4><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">Consider a package with following structure: </p><pre style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; margin-top: 0px; margin-bottom: 16px; line-height: 1.45; word-wrap: normal; padding: 16px; overflow: auto; background-color: rgb(247, 247, 247); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; color: rgb(51, 51, 51);" class=""><code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; padding: 0px; margin: 0px; background-color: transparent; border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px; border: 0px; display: inline; overflow: visible; line-height: inherit; word-wrap: normal;" class="">├── Package.swift
└── Sources
├── FooLibrary
│ └── Foo.swift
└── SampleCLI
└── main.swift
</code></pre><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">The manifest with <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">private</code> target could look like:</p><div style="margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class=""><pre style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; margin-top: 0px; margin-bottom: 0px; line-height: 1.45; word-wrap: normal; padding: 16px; overflow: auto; background-color: rgb(247, 247, 247); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class=""><span style="color: rgb(167, 29, 93);" class="">import</span> <span style="color: rgb(0, 134, 179);" class="">PackageDescription</span>
<span style="color: rgb(167, 29, 93);" class="">let</span> package <span style="color: rgb(167, 29, 93);" class="">=</span> Package(
name: <span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>FooLibrary<span class="">"</span></span>,
targets: [
Target(name: <span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>FooLibrary<span class="">"</span></span>),
Target(name: <span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>SampleCLI<span class="">"</span></span>, isPrivate: <span style="color: rgb(0, 134, 179);" class="">true</span>),
])</pre></div><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">When this package is used as a dependency only <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">FooLibrary</code> is built and is importable.</p><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">Targets can have other targets as dependency inside a package. A <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">private</code> target should only be a dependency to other private targets. For e.g. A manifest like this should result in a build failure.</p><div style="margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class=""><pre style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; margin-top: 0px; margin-bottom: 0px; line-height: 1.45; word-wrap: normal; padding: 16px; overflow: auto; background-color: rgb(247, 247, 247); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class=""><span style="color: rgb(167, 29, 93);" class="">import</span> <span style="color: rgb(0, 134, 179);" class="">PackageDescription</span>
<span style="color: rgb(167, 29, 93);" class="">let</span> package <span style="color: rgb(167, 29, 93);" class="">=</span> Package(
name: <span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>FooLibrary<span class="">"</span></span>,
targets: [
Target(name: <span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>FooCore<span class="">"</span></span>, isPrivate: <span style="color: rgb(0, 134, 179);" class="">true</span>),
Target(name: <span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>FooLibrary<span class="">"</span></span>, dependencies: [<span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>FooCore<span class="">"</span></span>]), <span style="color: rgb(150, 152, 150);" class="">// Error FooCore is private.</span>
Target(name: <span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>SampleCLI<span class="">"</span></span>, dependencies: [<span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>FooCore<span class="">"</span></span>], isPrivate: <span style="color: rgb(0, 134, 179);" class="">true</span>), <span style="color: rgb(150, 152, 150);" class="">// Not an error because SampleCLI is private.</span>
])</pre></div><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">Error: <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">FooCore</code> is a private target, it cannot be a dependency to the public target <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">FooLibrary</code>.</p><h4 style="margin-top: 1em; margin-bottom: 16px; line-height: 1.4; font-size: 1.25em; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';" class=""><a href="https://github.com/aciidb0mb3r/swift-evolution/tree/swiftpm-module-access-control#2-import-selected-targets-2" target="_blank" style="background-color: transparent; color: rgb(64, 120, 192); text-decoration: none; display: inline-block; padding-right: 2px; line-height: 1.2;" class=""></a>2. Import selected targets:</h4><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">Consider a dependency with following manifest file:</p><div style="margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class=""><pre style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; margin-top: 0px; margin-bottom: 0px; line-height: 1.45; word-wrap: normal; padding: 16px; overflow: auto; background-color: rgb(247, 247, 247); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class=""><span style="color: rgb(167, 29, 93);" class="">import</span> <span style="color: rgb(0, 134, 179);" class="">PackageDescription</span>
<span style="color: rgb(167, 29, 93);" class="">let</span> package <span style="color: rgb(167, 29, 93);" class="">=</span> Package(
name: <span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>FooLibrary<span class="">"</span></span>,
targets: [
Target(name: <span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>Foo<span class="">"</span></span>),
Target(name: <span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>Bar<span class="">"</span></span>, dependencies: [<span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>Foo<span class="">"</span></span>]),
Target(name: <span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>Baz<span class="">"</span></span>),
])</pre></div><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">To get only the <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">Bar</code> target from the above package, following manifest could be written:</p><div style="margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class=""><pre style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; margin-top: 0px; margin-bottom: 0px; line-height: 1.45; word-wrap: normal; padding: 16px; overflow: auto; background-color: rgb(247, 247, 247); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class=""><span style="color: rgb(167, 29, 93);" class="">import</span> <span style="color: rgb(0, 134, 179);" class="">PackageDescription</span>
<span style="color: rgb(167, 29, 93);" class="">let</span> package <span style="color: rgb(167, 29, 93);" class="">=</span> Package(
name: <span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>FooUser<span class="">"</span></span>,
dependencies: [
<span style="color: rgb(167, 29, 93);" class="">.</span>Package(
url: <span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>../FooLibrary<span class="">"</span></span>,
majorVersion: <span style="color: rgb(0, 134, 179);" class="">1</span>,
targets: [<span style="color: rgb(24, 54, 145);" class=""><span class="">"</span>Bar<span class="">"</span></span>])
])</pre></div><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">Note: In this case since Bar depends on Foo, Foo will be also be implicitly built and be available.</p><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">Any target mentioned in <code style="font-family: Consolas, 'Liberation Mono', Menlo, Courier, monospace; font-size: 14px; padding: 0.2em 0px; margin: 0px; background-color: rgba(0, 0, 0, 0.0392157); border-top-left-radius: 3px; border-top-right-radius: 3px; border-bottom-right-radius: 3px; border-bottom-left-radius: 3px;" class="">targets</code> and not present in the package should result in build failure.</p><h2 style="margin-top: 1em; margin-bottom: 16px; line-height: 1.225; font-size: 1.75em; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: rgb(238, 238, 238); color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';" class=""><a href="https://github.com/aciidb0mb3r/swift-evolution/tree/swiftpm-module-access-control#impact-on-existing-code" target="_blank" style="background-color: transparent; color: rgb(64, 120, 192); text-decoration: none; display: inline-block; padding-right: 2px; line-height: 1;" class=""></a>Impact on Existing Code</h2><p style="margin-top: 0px; margin-bottom: 16px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px;" class="">There will be no impact on existing code as these features are additive.</p><h2 style="margin-top: 1em; margin-bottom: 16px; line-height: 1.225; font-size: 1.75em; padding-bottom: 0.3em; border-bottom-width: 1px; border-bottom-style: solid; border-bottom-color: rgb(238, 238, 238); color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol';" class=""><a href="https://github.com/aciidb0mb3r/swift-evolution/tree/swiftpm-module-access-control#alternatives-considered" target="_blank" style="background-color: transparent; color: rgb(64, 120, 192); text-decoration: none; display: inline-block; padding-right: 2px; line-height: 1;" class=""></a>Alternatives Considered</h2><div style="margin-top: 0px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Helvetica, 'Segoe UI', Arial, freesans, sans-serif, 'Apple Color Emoji', 'Segoe UI Emoji', 'Segoe UI Symbol'; font-size: 16px; margin-bottom: 0px !important;" class="">None at this time.</div></div><div class=""><br class=""></div>--<span class="Apple-converted-space"> </span><br class=""><div data-smartmail="gmail_signature" class="">Ankit<br class=""><br class=""></div><br class=""><br class=""></div></div></div>_______________________________________________<br class="">swift-build-dev mailing list<br class=""><a href="mailto:swift-build-dev@swift.org" target="_blank" class="">swift-build-dev@swift.org</a><br class=""><a href="https://lists.swift.org/mailman/listinfo/swift-build-dev" target="_blank" class="">https://lists.swift.org/mailman/listinfo/swift-build-dev</a><br class=""></div></blockquote></div><br class=""></div></div></blockquote></div><br class=""><br clear="all" class=""><div class=""><br class=""></div>--<span class="Apple-converted-space"> </span><br class=""><div class="gmail_signature" data-smartmail="gmail_signature">Ankit<br class=""><br class=""></div></div><span style="font-family: Helvetica; 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