Specify platform when building Docker images (#39)

gwynne · web-flow · commit 7e5754376b94 · 2023-11-03T10:49:54.000Z
Without this, cross-compiling between a host and target with different CPU architectures when copying from Docker fails due to pulling the wrong Docker image.
diff --git a/Sources/SwiftSDKGenerator/Generator/SwiftSDKGenerator.swift b/Sources/SwiftSDKGenerator/Generator/SwiftSDKGenerator.swift
@@ -141,7 +141,7 @@ public actor SwiftSDKGenerator {
         at: tmp.appending("Dockerfile"),
         Data(
           """
-          FROM \(baseImage)
+          FROM --platform=linux/\(self.targetTriple.cpu.debianConventionName) \(baseImage)
           """.utf8
         )
       )

Original file line number	Diff line number	Diff line change
`@@ -141,7 +141,7 @@ public actor SwiftSDKGenerator {`
`141`	`141`	`at: tmp.appending("Dockerfile"),`
`142`	`142`	`Data(`
`143`	`143`	`"""`
`144`		`- FROM \(baseImage)`
	`144`	`+ FROM --platform=linux/\(self.targetTriple.cpu.debianConventionName) \(baseImage)`
`145`	`145`	`""".utf8`
`146`	`146`	`)`
`147`	`147`	`)`