add apk-manifest(8)

doc/Makefile

@@ -14,6 +14,7 @@ docs: $(obj)/apk.8 \
 	$(obj)/apk-index.8 \
 	$(obj)/apk-info.8 \
 	$(obj)/apk-list.8 \
+	$(obj)/apk-manifest.8 \
 	$(obj)/apk-policy.8 \
 	$(obj)/apk-update.8 \
 	$(obj)/apk-upgrade.8 \

doc/apk-manifest.8.scd

@@ -0,0 +1,33 @@
+apk-manifest(8)
+
+# NAME
+
+apk manifest - Show checksums of package contents
+
+# SYNOPSIS
+
+*apk manifest* [<_options_>...] _packages_...
+
+# DESCRIPTION
+
+*apk manifest* prints the checksums of files in the listed packages. One file
+is printed per line, the checksum first, followed by a space, and then the path
+to the file.
+
+The checksum itself is printed in the format _algorithm_:_hash_. Supported
+algorithms are:
+
+- *md5*
+- *sha1*
+
+*sha1* is used for new packages.
+
+# OPTIONS
+
+*apk manifest* does not support any specific options. See *apk*(8) for global
+options.
+
+# AUTHORS
+
+Natanael Copa <ncopa@alpinelinux.org>++
+Timo Teräs <_timo.teras@iki.fi_>

src/manifest.c

@@ -5,7 +5,7 @@
  * Copyright (C) 2017 William Pitcock <nenolod@dereferenced.org>
  * All rights reserved.
  *
- * This program is free software; you can redistribute it and/or modify it 
+ * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 as published
  * by the Free Software Foundation. See http://www.gnu.org/ for details.
  */
@@ -21,6 +21,7 @@
 
 /* TODO: support package files as well as generating manifest from the installed DB. */
 static char *csum_types[APK_CHECKSUM_SHA1 + 1] = {
+	/* Note: if adding new algorithms, update apk-manifest(8) */
 	[APK_CHECKSUM_MD5] = "md5",
 	[APK_CHECKSUM_SHA1] = "sha1",
 };