candidate env var sources

common/known_paths.go

@@ -0,0 +1,35 @@
+package common
+
+import (
+	"github.com/mitchellh/go-homedir"
+)
+
+var knownPaths = []string{
+	// global
+	"/etc/profile",
+	"/etc/zprofile",
+	"/etc/zlogin",
+	"/etc/zshenv",
+	// generic
+	"~/.profile",
+	// zsh: https://zsh.sourceforge.io/Doc/Release/Files.html#Startup_002fShutdown-Files
+	"~/.zshenv",
+	"~/.zprofile",
+	"~/.zshrc",
+	"~/.zlogin",
+	// bash: https://www.gnu.org/software/bash/manual/html_node/Bash-Startup-Files.html
+	"~/.bashrc",
+	"~/.bash_profile",
+	"~/.bash_login",
+}
+
+// ForEachKnownPath iterates over expanded known paths if they're legitimate
+func ForEachKnownPath(fn func(string, string)) {
+	for _, knownPath := range knownPaths {
+		expanded, err := homedir.Expand(knownPath)
+		if err != nil {
+			continue
+		}
+		fn(knownPath, expanded)
+	}
+}

common/known_paths_test.go

@@ -0,0 +1,16 @@
+package common
+
+import (
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+)
+
+func Test_all_known_paths_can_be_expanded(t *testing.T) {
+	count := 0
+	ForEachKnownPath(func(_, _ string) {
+		count++
+	})
+	assert.Greater(t, count, 0)
+	assert.Equal(t, count, len(knownPaths))
+}