{"id":10,"date":"2009-02-02T21:29:17","date_gmt":"2009-02-03T05:29:17","guid":{"rendered":""},"modified":"2011-03-30T10:30:28","modified_gmt":"2011-03-30T17:30:28","slug":"informative_blocker_output","status":"publish","type":"post","link":"https:\/\/blogs.gentoo.org\/zmedico\/2009\/02\/02\/informative_blocker_output\/","title":{"rendered":"Informative output for unresolved blockers"},"content":{"rendered":"<p>In <a href=\"http:\/\/packages.gentoo.org\/package\/sys-apps\/portage\">portage-2.1.6.7<\/a>, emerge output for unresolved blockers now includes information about how conflicting packages got pulled into the dependency graph. This information helps users understand the reason why a particular blocker hasn&#8217;t been resolved automatically. Here is some sample output from <a href=\"http:\/\/bugs.gentoo.org\/show_bug.cgi?id=234907#c138\">bug 234907<\/a>:<\/p>\n<pre>Calculating dependencies... done!\r\n[ebuild  N    ] sys-libs\/e2fsprogs-libs-1.41.3-r1  USE=\"nls\"\r\n[ebuild     U ] sys-fs\/e2fsprogs-1.41.3 [1.40.9]\r\n[blocks b     ] &lt;sys-fs\/e2fsprogs-1.41 (\"&lt;sys-fs\/e2fsprogs-1.41\" is blocking sys-libs\/e2fsprogs-libs-1.41.3-r1)\r\n[blocks B     ] sys-libs\/com_err (\"sys-libs\/com_err\" is blocking sys-libs\/e2fsprogs-libs-1.41.3-r1)\r\n[blocks B     ] sys-libs\/ss (\"sys-libs\/ss\" is blocking sys-libs\/e2fsprogs-libs-1.41.3-r1)\r\n[blocks B     ] sys-libs\/e2fsprogs-libs (\"sys-libs\/e2fsprogs-libs\" is blocking sys-libs\/com_err-1.40.9, sys-libs\/ss-1.40.9)\r\n\r\n * Error: The above package list contains packages which cannot be\r\n * installed at the same time on the same system.\r\n\r\n  ('installed', '\/', 'sys-libs\/com_err-1.40.9', 'nomerge') pulled in by\r\n    ~sys-libs\/com_err-1.40.9 required by ('installed', '\/', 'sys-libs\/ss-1.40.9', 'nomerge')\r\n\r\n  ('installed', '\/', 'sys-libs\/ss-1.40.9', 'nomerge') pulled in by\r\n    sys-libs\/ss required by world\r\n\r\n  ('ebuild', '\/', 'sys-libs\/e2fsprogs-libs-1.41.3-r1', 'merge') pulled in by\r\n    &gt;=sys-libs\/e2fsprogs-libs-1.41 required by ('installed', '\/', 'sys-apps\/util-linux-2.14.1', 'nomerge')\r\n    ~sys-libs\/e2fsprogs-libs-1.41.3 required by ('ebuild', '\/', 'sys-fs\/e2fsprogs-1.41.3', 'merge')<\/pre>\n<p>The above output shows that the <strong>sys-libs\/ss<\/strong> package got pulled into the dependency graph by the <strong>world<\/strong> set. This package is obsolete, so the user should remove it from <em>\/var\/lib\/portage\/world<\/em>. In the future, I plan to add support for emerge to ask the user if they&#8217;d like to have the obsolete package automatically removed from the world file (<a href=\"http:\/\/bugs.gentoo.org\/show_bug.cgi?id=257009\">bug 257009<\/a>).<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In portage-2.1.6.7, emerge output for unresolved blockers now includes information about how conflicting packages got pulled into the dependency graph. This information helps users understand the reason why a particular blocker hasn&#8217;t been resolved automatically. Here is some sample output from bug 234907: Calculating dependencies&#8230; done! [ebuild N ] sys-libs\/e2fsprogs-libs-1.41.3-r1 USE=&#8221;nls&#8221; [ebuild U ] sys-fs\/e2fsprogs-1.41.3 &hellip; <a href=\"https:\/\/blogs.gentoo.org\/zmedico\/2009\/02\/02\/informative_blocker_output\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Informative output for unresolved blockers<\/span><\/a><\/p>\n","protected":false},"author":65,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[3],"tags":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/posts\/10"}],"collection":[{"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/users\/65"}],"replies":[{"embeddable":true,"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/comments?post=10"}],"version-history":[{"count":1,"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/posts\/10\/revisions"}],"predecessor-version":[{"id":71,"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/posts\/10\/revisions\/71"}],"wp:attachment":[{"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/media?parent=10"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/categories?post=10"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blogs.gentoo.org\/zmedico\/wp-json\/wp\/v2\/tags?post=10"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}