[Libguestfs] [PATCH v3] v2v: linux: use NEVR for querying RPM packages (RHBZ#1669395)

Use NEVR when querying RPM for the list of files of a package, instead of ENVR. Also, use the epoch only when non-zero, and version of RPM supports it. The approach is basically copied from what supermin does in its RPM package handler. --- v2v/linux.ml | 59 +++++++++++++++++++++++++++++++++------------------- 1 file changed, 38 insertions(+), 21 deletions(-) diff --git a/v2v/linux.ml b/v2v/linux.ml index 43449157b..99b0e0e7b 100644 --- a/v2v/linux.ml +++ b/v2v/linux.ml @@ -27,6 +27,8 @@ open Utils module G = Guestfs +let re_version = PCRE.compile "(\\d+)\\.(\\d+)" + let augeas_reload g = g#aug_load (); debug_augeas_errors g @@ -80,29 +82,44 @@ let file_list_of_package (g : Guestfs.guestfs) inspect app = | "rpm" -> (* Since RPM allows multiple packages installed with the same - * name, always check the full ENVR here (RHBZ#1161250). + * name, always check the full NEVR here (RHBZ#1161250). + * + * In RPM < 4.11 query commands that use the epoch number in the + * package name did not work. + * + * For example: + * RHEL 6 (rpm 4.8.0): + * $ rpm -q tar-2:1.23-11.el6.x86_64 + * package tar-2:1.23-11.el6.x86_64 is not installed + * Fedora 20 (rpm 4.11.2): + * $ rpm -q tar-2:1.26-30.fc20.x86_64 + * tar-1.26-30.fc20.x86_64 *) + let is_rpm_lt_4_11 () = + let ver = + try + let ver = List.find_map ( + function + | { G.app2_name = name; G.app2_version = version } + when name = "rpm" -> Some version + | _ -> None + ) inspect.i_apps in + if PCRE.matches re_version ver then + (int_of_string (PCRE.sub 1), int_of_string (PCRE.sub 2)) + else + (0, 0) + with Not_found -> + (* 'rpm' not installed? Hmm... *) + (0, 0) in + ver < (4, 11) + in let pkg_name = - sprintf "%s-%s-%s" app.G.app2_name - app.G.app2_version app.G.app2_release in - let pkg_name = - if app.G.app2_epoch > 0_l then ( - (* RHEL 3/4 'rpm' does not support using the epoch prefix. - * (RHBZ#1170685). - *) - let is_rhel_lt_5 = - match inspect with - | { i_type = "linux"; - i_distro = "rhel" | "centos" | "scientificlinux" | - "oraclelinux" | "redhat-based"; - i_major_version = v } when v < 5 -> true - | _ -> false in - if is_rhel_lt_5 then - pkg_name - else - sprintf "%ld:%s" app.G.app2_epoch pkg_name - ) else - pkg_name in + if app.G.app2_epoch = Int32.zero || is_rpm_lt_4_11 () then + sprintf "%s-%s-%s" app.G.app2_name app.G.app2_version + app.G.app2_release + else + sprintf "%s-%ld:%s-%s" app.G.app2_name app.G.app2_epoch + app.G.app2_version app.G.app2_release in let cmd = [| "rpm"; "-ql"; pkg_name |] in debug "%s" (String.concat " " (Array.to_list cmd)); let files = g#command_lines cmd in -- 2.20.1