Как установить git-svn с учетом этого странного статуса apt-cache?

Как установить git-svn с учетом этой ошибки apt-get и, казалось бы, странного статуса apt-cache:

$ sudo apt-get install git-svn Reading package lists... Done Building dependency tree Reading state information... Done Some packages could not be installed. This may mean that you have requested an impossible situation or if you are using the unstable distribution that some required packages have not yet been created or been moved out of Incoming. The following information may help to resolve the situation: The following packages have unmet dependencies: git-svn : Depends: git (< 1:1.7.10.4-.) E: Unable to correct problems, you have held broken packages. 

Результат showtkg apt-cache:

 $ apt-cache showpkg git-svn Package: git-svn Versions: 1:1.9.1-1~bpo70+2 (/var/lib/apt/lists/ftp.debian.org_debian_dists_wheezy-backports_main_binary-amd64_Packages) Description Language: File: /var/lib/apt/lists/http.us.debian.org_debian_dists_wheezy_main_binary-amd64_Packages MD5: fe9279673cf6573640700aabf410ef25 Description Language: en File: /var/lib/apt/lists/http.us.debian.org_debian_dists_wheezy_main_i18n_Translation-en MD5: fe9279673cf6573640700aabf410ef25 1:1.7.10.4-1+wheezy1 (/var/lib/apt/lists/http.us.debian.org_debian_dists_wheezy_main_binary-amd64_Packages) Description Language: File: /var/lib/apt/lists/http.us.debian.org_debian_dists_wheezy_main_binary-amd64_Packages MD5: fe9279673cf6573640700aabf410ef25 Description Language: en File: /var/lib/apt/lists/http.us.debian.org_debian_dists_wheezy_main_i18n_Translation-en MD5: fe9279673cf6573640700aabf410ef25 Reverse Depends: git-doc,git-svn git-doc,git-svn git-all,git-svn git,git-svn moap,git-svn git-doc,git-svn git-all,git-svn git,git-svn Dependencies: 1:1.9.1-1~bpo70+2 - git (4 1:1.9.1) git (3 1:1.9.1-.) libsvn-perl (0 (null)) libyaml-perl (0 (null)) libterm-readkey-perl (0 (null)) git-doc (0 (null)) subversion (0 (null)) git (3 1:1.8.3~rc1-1.) git:i386 (3 1:1.8.3~rc1-1.) git (3 1:1.8.3~rc1-1.) git:i386 (3 1:1.8.3~rc1-1.) 1:1.7.10.4-1+wheezy1 - git (4 1:1.7.10.4) git (3 1:1.7.10.4-.) libsvn-perl (16 (null)) libsvn-core-perl (0 (null)) libyaml-perl (0 (null)) libwww-perl (0 (null)) libterm-readkey-perl (0 (null)) git-doc (0 (null)) subversion (0 (null)) cogito (3 0.16rc2-0) cogito:i386 (3 0.16rc2-0) Provides: 1:1.9.1-1~bpo70+2 - git-svn:i386 1:1.7.10.4-1+wheezy1 - Reverse Provides: 

Если я получаю страницу свойств git-svn от синаптики, она, похоже, показывает «<» и «>» для той же версии git, 1: 1.7.10.4

Мне пришлось проверять через lsb-release, потому что это не мой единственный debian:

 $ lsb_release -a No LSB modules are available. Distributor ID: Debian Description: Debian GNU/Linux 8.2 (jessie) Release: 8.2 Codename: jessie 

Вот политика apt-cache git

 $ apt-cache policy git git: Installed: 1:1.9.1-1~bpo70+2 Candidate: 1:1.9.1-1~bpo70+2 Version table: *** 1:1.9.1-1~bpo70+2 0 100 http://ftp.debian.org/debian/ wheezy-backports/main amd64 Packages 100 /var/lib/dpkg/status 1:1.7.10.4-1+wheezy1 0 500 http://http.us.debian.org/debian/ wheezy/main amd64 Packages 

Вот политика apt-cache git-svn

 $ apt-cache policy git-svn git-svn: Installed: (none) Candidate: 1:1.7.10.4-1+wheezy1 Version table: 1:1.9.1-1~bpo70+2 0 100 http://ftp.debian.org/debian/ wheezy-backports/main amd64 Packages 1:1.7.10.4-1+wheezy1 0 500 http://http.us.debian.org/debian/ wheezy/main amd64 Packages 

Хотя lsb-релиз, как показано выше, показывает «jessie», sources.list имеет только ссылку на «wheezy». «Политика apt-cache» содержит 68 ссылок на «wheezy», но ни один на «jessie».

apt-get install -st по запросу:

 apt-get install -st wheezy-backports git-svn Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: git-svn 0 upgraded, 1 newly installed, 0 to remove and 181 not upgraded. Inst git-svn (1:1.9.1-1~bpo70+2 Debian Backports:/wheezy-backports [all]) Conf git-svn (1:1.9.1-1~bpo70+2 Debian Backports:/wheezy-backports [all]) 

политика apt-cache lsb-release по запросу:

 apt-cache policy lsb-release lsb-release: Installed: 4.1+Debian13+nmu1 Candidate: 4.1+Debian13+nmu1 Version table: *** 4.1+Debian13+nmu1 0 100 /var/lib/dpkg/status 4.1+Debian8+deb7u1 0 500 http://http.us.debian.org/debian/ wheezy/main amd64 Packages 

политика apt-cache (все это)

 Package files: 100 /var/lib/dpkg/status release a=now 500 http://security.debian.org/ wheezy/updates/non-free Translation-en 500 http://security.debian.org/ wheezy/updates/main Translation-en 500 http://security.debian.org/ wheezy/updates/contrib Translation-en 500 http://security.debian.org/ wheezy/updates/non-free i386 Packages release v=7.0,o=Debian,a=oldstable,n=wheezy,l=Debian-Security,c=non-free origin security.debian.org 500 http://security.debian.org/ wheezy/updates/contrib i386 Packages release v=7.0,o=Debian,a=oldstable,n=wheezy,l=Debian-Security,c=contrib origin security.debian.org 500 http://security.debian.org/ wheezy/updates/main i386 Packages release v=7.0,o=Debian,a=oldstable,n=wheezy,l=Debian-Security,c=main origin security.debian.org 500 http://security.debian.org/ wheezy/updates/non-free amd64 Packages release v=7.0,o=Debian,a=oldstable,n=wheezy,l=Debian-Security,c=non-free origin security.debian.org 500 http://security.debian.org/ wheezy/updates/contrib amd64 Packages release v=7.0,o=Debian,a=oldstable,n=wheezy,l=Debian-Security,c=contrib origin security.debian.org 500 http://security.debian.org/ wheezy/updates/main amd64 Packages release v=7.0,o=Debian,a=oldstable,n=wheezy,l=Debian-Security,c=main origin security.debian.org 500 http://ftp.debian.org/debian/ wheezy-backports/non-free Translation-en 500 http://ftp.debian.org/debian/ wheezy-backports/main Translation-en 500 http://ftp.debian.org/debian/ wheezy-backports/contrib Translation-en 100 http://ftp.debian.org/debian/ wheezy-backports/non-free i386 Packages release v=,o=Debian Backports,a=wheezy-backports,n=wheezy-backports,l=Debian Backports,c=non-free origin ftp.debian.org 100 http://ftp.debian.org/debian/ wheezy-backports/contrib i386 Packages release v=,o=Debian Backports,a=wheezy-backports,n=wheezy-backports,l=Debian Backports,c=contrib origin ftp.debian.org 100 http://ftp.debian.org/debian/ wheezy-backports/main i386 Packages release v=,o=Debian Backports,a=wheezy-backports,n=wheezy-backports,l=Debian Backports,c=main origin ftp.debian.org 100 http://ftp.debian.org/debian/ wheezy-backports/non-free amd64 Packages release v=,o=Debian Backports,a=wheezy-backports,n=wheezy-backports,l=Debian Backports,c=non-free origin ftp.debian.org 100 http://ftp.debian.org/debian/ wheezy-backports/contrib amd64 Packages release v=,o=Debian Backports,a=wheezy-backports,n=wheezy-backports,l=Debian Backports,c=contrib origin ftp.debian.org 100 http://ftp.debian.org/debian/ wheezy-backports/main amd64 Packages release v=,o=Debian Backports,a=wheezy-backports,n=wheezy-backports,l=Debian Backports,c=main origin ftp.debian.org 500 http://download.virtualbox.org/virtualbox/debian/ wheezy/non-free i386 Packages release o=Oracle Corporation,n=wheezy,l=Oracle Corporation,c=non-free origin download.virtualbox.org 500 http://download.virtualbox.org/virtualbox/debian/ wheezy/contrib i386 Packages release o=Oracle Corporation,n=wheezy,l=Oracle Corporation,c=contrib origin download.virtualbox.org 500 http://download.virtualbox.org/virtualbox/debian/ wheezy/non-free amd64 Packages release o=Oracle Corporation,n=wheezy,l=Oracle Corporation,c=non-free origin download.virtualbox.org 500 http://download.virtualbox.org/virtualbox/debian/ wheezy/contrib amd64 Packages release o=Oracle Corporation,n=wheezy,l=Oracle Corporation,c=contrib origin download.virtualbox.org 500 http://ftp.us.debian.org/debian/ wheezy-updates/non-free Translation-en 500 http://ftp.us.debian.org/debian/ wheezy-updates/main Translation-en 500 http://ftp.us.debian.org/debian/ wheezy-updates/contrib Translation-en 500 http://ftp.us.debian.org/debian/ wheezy-updates/non-free i386 Packages release o=Debian,a=oldstable-updates,n=wheezy-updates,l=Debian,c=non-free origin ftp.us.debian.org 500 http://ftp.us.debian.org/debian/ wheezy-updates/contrib i386 Packages release o=Debian,a=oldstable-updates,n=wheezy-updates,l=Debian,c=contrib origin ftp.us.debian.org 500 http://ftp.us.debian.org/debian/ wheezy-updates/main i386 Packages release o=Debian,a=oldstable-updates,n=wheezy-updates,l=Debian,c=main origin ftp.us.debian.org 500 http://ftp.us.debian.org/debian/ wheezy-updates/non-free amd64 Packages release o=Debian,a=oldstable-updates,n=wheezy-updates,l=Debian,c=non-free origin ftp.us.debian.org 500 http://ftp.us.debian.org/debian/ wheezy-updates/contrib amd64 Packages release o=Debian,a=oldstable-updates,n=wheezy-updates,l=Debian,c=contrib origin ftp.us.debian.org 500 http://ftp.us.debian.org/debian/ wheezy-updates/main amd64 Packages release o=Debian,a=oldstable-updates,n=wheezy-updates,l=Debian,c=main origin ftp.us.debian.org 500 http://http.us.debian.org/debian/ wheezy/non-free Translation-en 500 http://http.us.debian.org/debian/ wheezy/main Translation-en 500 http://http.us.debian.org/debian/ wheezy/contrib Translation-en 500 http://http.us.debian.org/debian/ wheezy/non-free i386 Packages release v=7.9,o=Debian,a=oldstable,n=wheezy,l=Debian,c=non-free origin http.us.debian.org 500 http://http.us.debian.org/debian/ wheezy/contrib i386 Packages release v=7.9,o=Debian,a=oldstable,n=wheezy,l=Debian,c=contrib origin http.us.debian.org 500 http://http.us.debian.org/debian/ wheezy/main i386 Packages release v=7.9,o=Debian,a=oldstable,n=wheezy,l=Debian,c=main origin http.us.debian.org 500 http://http.us.debian.org/debian/ wheezy/non-free amd64 Packages release v=7.9,o=Debian,a=oldstable,n=wheezy,l=Debian,c=non-free origin http.us.debian.org 500 http://http.us.debian.org/debian/ wheezy/contrib amd64 Packages release v=7.9,o=Debian,a=oldstable,n=wheezy,l=Debian,c=contrib origin http.us.debian.org 500 http://http.us.debian.org/debian/ wheezy/main amd64 Packages release v=7.9,o=Debian,a=oldstable,n=wheezy,l=Debian,c=main origin http.us.debian.org Pinned packages: 

Команда

 apt-get install -t wheezy-backports git-svn 

должен установить git-svn .

См. Примечания для флага -t в man apt-get :

  -t, --target-release, --default-release This option controls the default input to the policy engine; it creates a default pin at priority 990 using the specified release string. This overrides the general settings in /etc/apt/preferences. Specifically pinned packages are not affected by the value of this option. In short, this option lets you have simple control over which distribution packages will be retrieved from. Some common examples might be -t '2.1*', -t unstable or -t sid. Configuration Item: APT::Default-Release; see also the apt_preferences(5) manual page. и  -t, --target-release, --default-release This option controls the default input to the policy engine; it creates a default pin at priority 990 using the specified release string. This overrides the general settings in /etc/apt/preferences. Specifically pinned packages are not affected by the value of this option. In short, this option lets you have simple control over which distribution packages will be retrieved from. Some common examples might be -t '2.1*', -t unstable or -t sid. Configuration Item: APT::Default-Release; see also the apt_preferences(5) manual page.