pkg/utils: add ELN as supported distro

doc/toolbox.1.md

@@ -55,7 +55,8 @@ distribution for creating containers. If the host is not supported, then it
 falls back to a Fedora image. Supported host operating systems are:
 
 * Arch Linux
-* Fedora
+* Fedora Linux
+* Fedora ELN
 * Red Hat Enterprise Linux >= 8.5
 * Ubuntu
 
@@ -68,6 +69,7 @@ specifies its version. Supported combinations are:
 Distro |Release
 -------|----------
 arch   |latest or rolling
+eln    |latest
 fedora |\<release\> or f\<release\> eg., 36 or f36
 rhel   |\<major\>.\<minor\> eg., 8.5
 ubuntu |\<YY\>.\<MM\> eg., 22.04

src/meson.build

@@ -35,6 +35,7 @@ sources = files(
   'pkg/term/term_test.go',
   'pkg/utils/libsubid-wrappers.c',
   'pkg/utils/arch.go',
+  'pkg/utils/eln.go',
   'pkg/utils/errors.go',
   'pkg/utils/fedora.go',
   'pkg/utils/rhel.go',

src/pkg/utils/eln.go

@@ -0,0 +1,39 @@
+/*
+ * Copyright © 2021 – 2026 Red Hat Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package utils
+
+func getDefaultReleaseELN() (string, error) {
+	return "latest", nil
+}
+
+func getFullyQualifiedImageELN(image, release string) string {
+	imageFull := "quay.io/fedora/" + image
+	return imageFull
+}
+
+func getP11KitClientPathsELN() []string {
+	paths := []string{"/usr/lib64/pkcs11/p11-kit-client.so"}
+	return paths
+}
+
+func parseReleaseELN(release string) (string, error) {
+	if release != "latest" && release != "" {
+		return "", &ParseReleaseError{"The release must be 'latest'."}
+	}
+
+	return "latest", nil
+}

src/pkg/utils/utils.go

@@ -139,6 +139,15 @@ var (
 			getP11KitClientPathsArch,
 			parseReleaseArch,
 		},
+		"eln": {
+			"eln-toolbox",
+			"eln-toolbox",
+			false,
+			getDefaultReleaseELN,
+			getFullyQualifiedImageELN,
+			getP11KitClientPathsELN,
+			parseReleaseELN,
+		},
 		"fedora": {
 			"fedora-toolbox",
 			"fedora-toolbox",

src/pkg/utils/utils_test.go

@@ -103,6 +103,21 @@ func TestParseRelease(t *testing.T) {
 			inputRelease: "foo",
 			errMsg:       "The release must be 'latest'.",
 		},
+		{
+			inputDistro:  "eln",
+			inputRelease: "",
+			output:       "latest",
+		},
+		{
+			inputDistro:  "eln",
+			inputRelease: "latest",
+			output:       "latest",
+		},
+		{
+			inputDistro:  "eln",
+			inputRelease: "11",
+			errMsg:       "The release must be 'latest'.",
+		},
 		{
 			inputDistro:  "fedora",
 			inputRelease: "f34",