Emcee

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import Foundation
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import PathLib
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public final class DeployableBundle: DeployableItem {
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    public init(name: String, bundlePath: AbsolutePath) throws {
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        super.init(
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            name: name,
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            files: try DeployableBundle.filesForBundle(bundlePath: bundlePath)
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        )
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    }
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    public static func filesForBundle(bundlePath: AbsolutePath) throws -> Set<DeployableFile> {
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        let bundleName = bundlePath.lastComponent
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        var files: Set<DeployableFile> = [DeployableFile(source: bundlePath, destination: RelativePath(bundleName))]
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        guard let enumerator = FileManager.default.enumerator(at: bundlePath.fileUrl.resolvingSymlinksInPath(), includingPropertiesForKeys: nil) else {
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            throw DeploymentError.failedToEnumerateContentsOfDirectory(bundlePath)
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        }
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        while let url = enumerator.nextObject() as? URL {
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            let localPath: AbsolutePath
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            let relativePath: RelativePath
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            if let computedRelativePath = url.path.stringWithPathRelativeTo(anchorPath: bundlePath.pathString, allowUpwardRelation: false) {
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                localPath = AbsolutePath(url.path)
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                relativePath = RelativePath(computedRelativePath)
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            } else if let computedRelativePath = url.resolvingSymlinksInPath().path.stringWithPathRelativeTo(anchorPath: bundlePath.pathString, allowUpwardRelation: false) {
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                localPath = AbsolutePath(url.resolvingSymlinksInPath().path)
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                relativePath = RelativePath(computedRelativePath)
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            } else {
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                throw DeploymentError.failedToRelativizePath(AbsolutePath(url.path), anchorPath: bundlePath)
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            }
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            let destinationRelativePath = RelativePath(bundleName).appending(relativePath: relativePath)
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            files.insert(DeployableFile(source: localPath, destination: destinationRelativePath))
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        }
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        return files
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    }
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}
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