Print the target arch when using the %a format specifier

Adds the %a format specifier to allow printing of a target's arch
when using --print-format.
Signed-off-by: Jonathan Sköld <arch@skold.dev>
Signed-off-by: Allan McRae <allan@archlinux.org>

doc/pacman.8.asciidoc

@@ -235,8 +235,9 @@ Transaction Options (apply to '-S', '-R' and '-U')
 
 *\--print-format* <format>::
 	Specify a printf-like format to control the output of the '\--print'
-	operation. The possible attributes are: "%n" for pkgname, "%v" for pkgver,
-	"%l" for location, "%r" for repository, and "%s" for size. Implies '\--print'.
+	operation. The possible attributes are: "%a" for arch, "%n" for pkgname,
+	"%v" for pkgver, "%l" for location, "%r" for repository, and "%s" for size.
+	Implies '\--print'.
 
 
 Upgrade Options (apply to '-S' and '-U')[[UO]]

src/pacman/util.c

@@ -1146,6 +1146,16 @@ void print_packages(const alpm_list_t *packages)
 		alpm_pkg_t *pkg = i->data;
 		char *string = strdup(config->print_format);
 		char *temp = string;
+		/* %a : arch */
+		if(strstr(temp, "%a")) {
+			const char *arch = alpm_pkg_get_arch(pkg);
+			if(arch == NULL) {
+				arch = "";
+			}
+			string = strreplace(temp, "%a", arch);
+			free(temp);
+			temp = string;
+		}
 		/* %n : pkgname */
 		if(strstr(temp, "%n")) {
 			string = strreplace(temp, "%n", alpm_pkg_get_name(pkg));