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From 60c3f93e95a3ca54ef0a7eebc5ef29a5d92d3110 Mon Sep 17 00:00:00 2001
From: Paul Barker <paul@paulbarker.me.uk>
Date: Fri, 28 Mar 2014 15:20:22 +0000
Subject: [PATCH 2/2] opkg-0.2.x: add-exclude

Add a way to exclude specific packages from the install

When an excluded package is required by another package an error
will be generated.  If the excluded package is only recommended,
no error will be generated.

The lifespan of the exclude_list covers the execution of the process,
so there is no need to free the data.

v2: Use xmalloc instead of malloc and xrealloc instead of realloc. In opkg,
these functions are guaranteed not to return NULL.

Upstream-Status: Accepted for v0.3.0 release with modifications

Signed-off-by: Mark Hatle <mark.hatle@windriver.com>
Signed-off-by: Jonathan Liu <net147@gmail.com>
Signed-off-by: Paul Barker <paul@paulbarker.me.uk>
---
 libopkg/opkg_conf.c   |  1 +
 libopkg/opkg_conf.h   |  2 ++
 libopkg/pkg_depends.c | 16 ++++++++++++++++
 src/opkg-cl.c         | 15 +++++++++++++++
 4 files changed, 34 insertions(+)

diff --git a/libopkg/opkg_conf.c b/libopkg/opkg_conf.c
index 4eee37b..1ab63fb 100644
--- a/libopkg/opkg_conf.c
+++ b/libopkg/opkg_conf.c
@@ -447,6 +447,7 @@ opkg_conf_init(void)
 	pkg_dest_list_init(&conf->pkg_dest_list);
 	pkg_dest_list_init(&conf->tmp_dest_list);
 	nv_pair_list_init(&conf->arch_list);
+	conf->exclude_list = NULL;
 
 	return 0;
 }
diff --git a/libopkg/opkg_conf.h b/libopkg/opkg_conf.h
index 2f189e0..6d6e613 100644
--- a/libopkg/opkg_conf.h
+++ b/libopkg/opkg_conf.h
@@ -51,6 +51,8 @@ struct opkg_conf
      pkg_dest_list_t pkg_dest_list;
      pkg_dest_list_t tmp_dest_list;
      nv_pair_list_t arch_list;
+     size_t exclude_count;
+     char ** exclude_list;
 
      int restrict_to_default_dest;
      pkg_dest_t *default_dest;
diff --git a/libopkg/pkg_depends.c b/libopkg/pkg_depends.c
index 41bf206..eb630d1 100644
--- a/libopkg/pkg_depends.c
+++ b/libopkg/pkg_depends.c
@@ -204,6 +204,22 @@ pkg_hash_fetch_unsatisfied_dependencies(pkg_t * pkg, pkg_vec_t *unsatisfied,
 			 continue;
 		    }
 
+		    /* Check for excluded packages */
+		    if (satisfying_pkg != NULL && conf->exclude_list) {
+			int i, exclude = 0;
+			for (i = 0; i < conf->exclude_count; i++) {
+			    if (!strcmp(satisfying_pkg->name, conf->exclude_list[i])) {
+				opkg_msg(NOTICE, "%s: exclude required package %s"
+					"at users request\n",
+					pkg->name, satisfying_pkg->name);
+				exclude = 1;
+				break;
+			    }
+			}
+			if (exclude)
+			    continue;
+		    }
+
 		    opkg_msg(DEBUG, "satisfying_pkg=%p\n", satisfying_pkg);
 		    if (satisfying_pkg != NULL) {
 			 satisfier_entry_pkg = satisfying_pkg;
diff --git a/src/opkg-cl.c b/src/opkg-cl.c
index 6378380..f10d10b 100644
--- a/src/opkg-cl.c
+++ b/src/opkg-cl.c
@@ -45,6 +45,7 @@ enum {
 	ARGS_OPT_PREFER_ARCH_TO_VERSION,
 	ARGS_OPT_ADD_ARCH,
 	ARGS_OPT_ADD_DEST,
+	ARGS_OPT_ADD_EXCLUDE,
 	ARGS_OPT_NOACTION,
 	ARGS_OPT_DOWNLOAD_ONLY,
 	ARGS_OPT_NODEPS,
@@ -97,6 +98,7 @@ static struct option long_options[] = {
 	{"offline-root", 1, 0, 'o'},
 	{"add-arch", 1, 0, ARGS_OPT_ADD_ARCH},
 	{"add-dest", 1, 0, ARGS_OPT_ADD_DEST},
+	{"add-exclude", 1, 0, ARGS_OPT_ADD_EXCLUDE},
 	{"test", 0, 0, ARGS_OPT_NOACTION},
 	{"tmp-dir", 1, 0, 't'},
 	{"tmp_dir", 1, 0, 't'},
@@ -200,6 +202,18 @@ args_parse(int argc, char *argv[])
 			}
 			free(tuple);
 			break;
+		case ARGS_OPT_ADD_EXCLUDE:
+			tuple = xstrdup(optarg);
+			if (!conf->exclude_list) {
+				conf->exclude_count = 1;
+				conf->exclude_list = xmalloc(sizeof(char *) * conf->exclude_count);
+				conf->exclude_list[conf->exclude_count - 1] = tuple;
+			} else {
+				conf->exclude_count++;
+				conf->exclude_list = xrealloc(conf->exclude_list, sizeof(char *) * conf->exclude_count);
+				conf->exclude_list[conf->exclude_count - 1] = tuple;
+			}
+			break;
 		case ARGS_OPT_NOACTION:
 			conf->noaction = 1;
 			break;
@@ -287,6 +301,7 @@ usage()
 	printf("\t--offline-root <dir>            offline installation of packages.\n");
 	printf("\t--add-arch <arch>:<prio>        Register architecture with given priority\n");
 	printf("\t--add-dest <name>:<path>        Register destination with given path\n");
+	printf("\t--add-exclude <name>		  Register package to be excluded from install\n");
 	printf("\t--prefer-arch-to-version        Use the architecture priority package rather\n");
 	printf("\t                                than the higher version one if more\n");
 	printf("\t                                than one candidate is found.\n");
-- 
2.1.3