如何在Debian postinst脚本中获取新安装的版本？

根据Debian Policy Manual,我的postinst脚本在升级和配置时被调用,如"postinst configure old-version ",其中old-version是以前安装的版本(可能为null).我想确定新版本,即当前正在配置(升级到)的版本.

环境变量$DPKG_MAINTSCRIPT_PACKAGE包含包名称; 似乎没有相应的_VERSION领域. /var/lib/dpkg/status在postinst运行之后得到更新,所以我似乎也无法解析它.

有任何想法吗？

这是解决此问题的最佳方法是在您的.postinst(或其他控制文件)中使用占位符变量:

case "$1" in
    configure)
        new_version="__NEW_VERSION__"
        # Do something interesting interesting with $new_version...
        ;;
    abort-upgrade|abort-remove|abort-deconfigure)
        # Do nothing
        ;;
    *)
        echo "Unrecognized postinst argument '$1'"
        ;;
esac

然后debian/rules,在构建时用适当的版本号替换占位符变量:

# Must not depend on anything. This is to be called by
# binary-arch/binary-indep in another 'make' thread.
binary-common:
    dh_testdir
    dh_testroot
    dh_lintian
    < ... snip ... >

    # Replace __NEW_VERSION__ with the actual new version in any control files
    for pkg in $$(dh_listpackages -i); do \
        sed -i -e 's/__NEW_VERSION__/$(shell $(SHELL) debian/gen_deb_version)/' debian/$$pkg/DEBIAN/*; \
    done

    # Note dh_builddeb *must* come after the above code
    dh_builddeb

得到的.postinst片断,发现debian//DEBIAN/postinst,看起来像:

case "$1" in
    configure)
        new_version="1.2.3"
        # Do something interesting interesting with $new_version...
        ;;
    abort-upgrade|abort-remove|abort-deconfigure)
        # Do nothing
        ;;
    *)
        echo "Unrecognized postinst argument '$1'"
        ;;
esac