From: Michael Tremer <michael.tremer@ipfire.org>
Date: Thu, 9 Mar 2023 13:33:12 +0000 (+0000)
Subject: repos: Try to hardlink packages when possible
X-Git-Tag: 0.9.29~347
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=dd8866ccd3aa079c89dc248affde76b2890374ea;p=pakfire.git

repos: Try to hardlink packages when possible

Since we no longer change any packages when composing a repository (no
embedded signatures), we can try to hardlink to save disk space and IO.

Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
---

diff --git a/src/libpakfire/archive.c b/src/libpakfire/archive.c
index db9d3ace4..8ecde7c90 100644
--- a/src/libpakfire/archive.c
+++ b/src/libpakfire/archive.c
@@ -850,6 +850,49 @@ ERROR:
 	return r;
 }
 
+static int pakfire_archive_link(struct pakfire_archive* archive, const char* path) {
+	int r;
+
+	// Check if path is set
+	if (!path) {
+		errno = EINVAL;
+		return 1;
+	}
+
+	DEBUG(archive->pakfire, "Linking %s to %s...\n", archive->path, path);
+
+	// Delete the destination file (if it exists)
+	unlink(path);
+
+	// Create the new link
+	r = link(archive->path, path);
+	if (r) {
+		DEBUG(archive->pakfire, "Could not create hardlink %s: %m\n", path);
+		return r;
+	}
+
+	return 0;
+}
+
+int pakfire_archive_link_or_copy(struct pakfire_archive* archive, const char* path) {
+	int r;
+
+	// Try to create a hardlink
+	r = pakfire_archive_link(archive, path);
+	if (r) {
+		switch (errno) {
+			// Try to copy the file if we could not create a hardlink
+			case EPERM:
+				r = pakfire_archive_copy(archive, path);
+
+			default:
+				break;
+		}
+	}
+
+	return r;
+}
+
 static int __pakfire_archive_extract(struct pakfire_archive* archive, int flags) {
 	struct pakfire_filelist* filelist = NULL;
 	struct pakfire_package* pkg = NULL;
diff --git a/src/libpakfire/include/pakfire/archive.h b/src/libpakfire/include/pakfire/archive.h
index 44eb04dce..811f78274 100644
--- a/src/libpakfire/include/pakfire/archive.h
+++ b/src/libpakfire/include/pakfire/archive.h
@@ -58,6 +58,7 @@ int pakfire_archive_make_package(struct pakfire_archive* archive,
 #include <pakfire/pakfire.h>
 
 int pakfire_archive_copy(struct pakfire_archive* archive, const char* path);
+int pakfire_archive_link_or_copy(struct pakfire_archive* archive, const char* path);
 
 int pakfire_archive_check_digest(struct pakfire_archive* archive,
 	const enum pakfire_digest_types type, const unsigned char* digest, const size_t length);