build: Might as well try building as "root"

Keeping in mind that rootlesskit runs as the host 'solbuild' user, this
seems as good as anything; do note that this means that there will be
host permission issues that probably need fixing.

This commit is for @joebonrichie to work off of

Signed-off-by: Rune Morling <[email protected]>

builder/build.go

@@ -338,7 +338,7 @@ func (p *Package) BuildYpkg(notif PidNotifier, usr *UserInfo, pman *EopkgManager
 	}
 
 	// need to properly quote the innner -c 'command' syntax
-	suCmd := fmt.Sprintf("strace /bin/su %s --command='%s'", BuildUser, buildCmd)
+	//suCmd := fmt.Sprintf("strace /bin/su %s --command='%s'", BuildUser, buildCmd)
 
 	if p.CanCCache {
 		// Start an sccache server to work around #87
@@ -352,9 +352,9 @@ func (p *Package) BuildYpkg(notif PidNotifier, usr *UserInfo, pman *EopkgManager
 	}
 
 	slog.Info("Now starting build", "package", p.Name)
-	slog.Info("Build", "command", suCmd)
+	slog.Info("Build", "command", buildCmd)
 
-	if err := RootlesskitExec(notif, overlay.MountPoint, suCmd); err != nil {
+	if err := RootlesskitExec(notif, overlay.MountPoint, buildCmd); err != nil {
 		return fmt.Errorf("Failed to start build of package, reason: %w\n", err)
 	}
 

builder/util.go

@@ -212,7 +212,8 @@ func ChrootExec(notif PidNotifier, dir, command string) error {
 // using the 'solbuild' user (expected to exist a priori and have /etc/sub{g,u}id files),
 // such that we can store the PID for long running tasks.
 func RootlesskitExec(notif PidNotifier, dir, command string) error {
-	rootlesskitCmd := fmt.Sprintf("-c rootlesskit chroot %s %s", dir, command)
+	rootlesskitCmd := fmt.Sprintf(
+		"-c rootlesskit --copy-up=/var/cache/eopkg/archives chroot %s %s", dir, command)
 	args := []string{"solbuild", rootlesskitCmd}
 	c := exec.Command("/bin/su", args...)
 	c.Stdout = os.Stdout