build: hack ethereum-swarm as a "depends" in deb package

build/ci.go

@@ -89,6 +89,8 @@ var (
 		executablePath("swarm"),
 	}
 
+	swarmPackageName = "ethereum-swarm"
+
 	// A debian package is created for all executables listed here.
 	debExecutables = []debExecutable{
 		{
@@ -125,13 +127,13 @@ var (
 	debSwarmExecutables = []debExecutable{
 		{
 			BinaryName:  "swarm",
-			PackageName: "ethereum-swarm",
+			PackageName: swarmPackageName,
 			Description: "Ethereum Swarm daemon and tools",
 		},
 	}
 
 	debSwarm = debPackage{
-		Name:            "ethereum-swarm",
+		Name:            swarmPackageName,
 		VersionFilePath: "swarm/VERSION",
 		Executables:     debSwarmExecutables,
 	}
@@ -653,6 +655,17 @@ func (meta debMetadata) ExeName(exe debExecutable) string {
 	return exe.Package()
 }
 
+// EthereumSwarmPackageName returns the name of the swarm package based on
+// environment, e.g. "ethereum-swarm-unstable", or "ethereum-swarm".
+// This is needed so that we make sure that "ethereum" package,
+// depends on and installs "ethereum-swarm"
+func (meta debMetadata) EthereumSwarmPackageName() string {
+	if isUnstableBuild(meta.Env) {
+		return swarmPackageName + "-unstable"
+	}
+	return swarmPackageName
+}
+
 // ExeConflicts returns the content of the Conflicts field
 // for executable packages.
 func (meta debMetadata) ExeConflicts(exe debExecutable) string {

build/deb/ethereum/deb.control

@@ -10,9 +10,9 @@ Vcs-Browser: https://github.com/ethereum/go-ethereum
 
 Package: {{.Name}}
 Architecture: any
-Depends: ${misc:Depends}, {{.ExeList}}
-Description: Meta-package to install geth and other tools
- Meta-package to install geth and other tools
+Depends: ${misc:Depends}, {{.EthereumSwarmPackageName}}, {{.ExeList}}
+Description: Meta-package to install geth, swarm, and other tools
+ Meta-package to install geth, swarm and other tools
 
 {{range .Executables}}
 Package: {{$.ExeName .}}