// makeSnapHookEnv returns an environment suitable for passing to
// os/exec.Cmd.Env
//
// The returned environment contains additional SNAP_* variables that
// are required when calling a meta/hook/ script and that will override
// any already existing SNAP_* variables in os.Environment()
func makeSnapHookEnv(snap *Snap) (env []string) {
desc := struct {
SnapName string
SnapArch string
SnapPath string
Version string
Revision int
UdevAppName string
}{
snap.Name(),
arch.UbuntuArchitecture(),
snap.Info().MountDir(),
snap.Version(),
snap.Revision(),
snap.Name(),
}
vars := snapenv.GetBasicSnapEnvVars(desc)
snapEnv := snapenv.MakeMapFromEnvList(vars)
// merge regular env and new snapEnv
envMap := snapenv.MakeMapFromEnvList(os.Environ())
for k, v := range snapEnv {
envMap[k] = v
}
// force default locale
envMap["LC_ALL"] = "C.UTF-8"
// flatten
for k, v := range envMap {
env = append(env, fmt.Sprintf("%s=%s", k, v))
}
return env
}
func (s *SnapTestSuite) TestMakeConfigEnv(c *C) {
yamlFile, err := makeInstalledMockSnap("", 11)
c.Assert(err, IsNil)
snap, err := NewInstalledSnap(yamlFile)
c.Assert(err, IsNil)
c.Assert(snap, NotNil)
os.Setenv("SNAP_NAME", "override-me")
defer os.Setenv("SNAP_NAME", "")
env := makeSnapHookEnv(snap)
// now ensure that the environment we get back is what we want
envMap := snapenv.MakeMapFromEnvList(env)
// regular env is unaltered
c.Assert(envMap["PATH"], Equals, os.Getenv("PATH"))
// SNAP_* is overriden
c.Assert(envMap["SNAP_NAME"], Equals, "hello-snap")
c.Assert(envMap["SNAP_VERSION"], Equals, "1.10")
c.Check(envMap["LC_ALL"], Equals, "C.UTF-8")
}
