From 7e7b9627e08cde36feafa92338bf28040d61d333 Mon Sep 17 00:00:00 2001
From: Josue David Hernandez Gutierrez <josue.d.hernandez@oracle.com>
Date: Thu, 31 Oct 2024 01:58:42 +0000
Subject: [PATCH 7/8] Support using repository definitions with OCI variables.

We can use repository definitions in a format, more similar to generic Oracle repositories
with DNF vars.
Essentially in osbuild-composer log when parsing repos, we at first parse variables, then process
original repo file in memory and replace vars with their values and write modified repo to buffer.
After that we use buffer to actually populate repository data.

If we have failed to read ocidomain, which is the key variable, we fallback to values to generic public repos.

Signed-off-by: Alex Burmashev <alexander.burmashev@oracle.com>
Signed-off-by: Josue David Hernandez Gutierrez <josue.d.hernandez@oracle.com>
---
 .../osbuild/images/pkg/rpmmd/repository.go    | 41 ++++++++++++++++++-
 1 file changed, 40 insertions(+), 1 deletion(-)

diff --git a/vendor/github.com/osbuild/images/pkg/rpmmd/repository.go b/vendor/github.com/osbuild/images/pkg/rpmmd/repository.go
index fe1d5d3..c95640d 100644
--- a/vendor/github.com/osbuild/images/pkg/rpmmd/repository.go
+++ b/vendor/github.com/osbuild/images/pkg/rpmmd/repository.go
@@ -9,6 +9,8 @@ import (
 	"strings"
 	"time"
 
+	"bufio"
+	"bytes"
 	"github.com/gobwas/glob"
 )
 
@@ -231,12 +233,49 @@ func LoadRepositoriesFromFile(filename string) (map[string][]RepoConfig, error)
 		return nil, err
 	}
 	defer f.Close()
+	var ocidomain, ociregion, region []byte
 
+	var OCIlines []string
+	ocidomain = []byte("oracle.com")
+	ociregion = []byte("")
+	region = []byte("")
+
+	ociregion, err = os.ReadFile("/etc/dnf/vars/ociregion")
+	if err != nil {
+		fmt.Println("Error while reading file: /etc/dnf/vars/ociregion")
+	}
+	region, err = os.ReadFile("/etc/dnf/vars/region")
+	if err != nil {
+		fmt.Println("Error while reading file: /etc/dnf/vars/region")
+	}
+	ocidomain, err = os.ReadFile("/etc/dnf/vars/ocidomain")
+	if err != nil {
+		fmt.Println("Error while reading file: /etc/dnf/vars/ocidomain")
+	}
+	if ocidomain == nil {
+		ocidomain = []byte("oracle.com")
+		ociregion = []byte("")
+	}
+	scanner := bufio.NewScanner(f)
+	OCIreplacer := strings.NewReplacer("$ocidomain", strings.TrimSuffix(string(ocidomain), "\n"), "$ociregion", strings.TrimSuffix(string(ociregion), "\n"), "$region", strings.TrimSuffix(string(region), "\n"))
+	for scanner.Scan() {
+		line := scanner.Text()
+		OCIline := OCIreplacer.Replace(line)
+		OCIlines = append(OCIlines, OCIline)
+		continue
+	}
+	if err := scanner.Err(); err != nil {
+		panic(err)
+	}
+	fOCI := strings.Join(OCIlines, "\n")
 	var reposMap map[string][]repository
 	repoConfigs := make(map[string][]RepoConfig)
 
-	err = json.NewDecoder(f).Decode(&reposMap)
+	buf := new(bytes.Buffer)
+	fmt.Fprint(buf, fOCI)
+	err = json.NewDecoder(buf).Decode(&reposMap)
 	if err != nil {
+		fmt.Println("Error parsing the repo")
 		return nil, err
 	}
 
-- 
2.43.5