[Libguestfs] [libguestfs-common PATCH] mlcustomize: factor out pkg install/update/uninstall from guestfs-tools
Laszlo Ersek
lersek at redhat.com
Mon Jun 6 14:20:16 UTC 2022
Factor the following internal functions from "guestfs-tools/customize" at
commit 40b28512f700 ("Version 1.49.2.", 2022-05-26):
- guest_install_command
- guest_update_command
- guest_uninstall_command
into a new interface in "libguestfs-common/mlcustomize".
Keep the "error_unknown_package_manager" and
"error_unimplemented_package_manager" helpers hidden from the interface.
Rewrap their message strings. Move them to the front, and make them raise
new exception types rather than exiting directly with "Tools_utils.error".
Strip the "guest_" prefix from the exposed functions' names, as external
referrers will qualify the functions with the "Guest_packages" interface
name anyway.
In all three functions, replace the common
g#inspect_get_package_management root
call (wherein the original context provides both "g" and "root") with a
new parameter that is the result of that call; name it
"package_management".
Write new documentation for the interface.
Bugzilla: https://bugzilla.redhat.com/show_bug.cgi?id=2028764
Signed-off-by: Laszlo Ersek <lersek at redhat.com>
---
mlcustomize/Makefile.am | 2 +
mlcustomize/guest_packages.mli | 44 +++++++
mlcustomize/guest_packages.ml | 132 ++++++++++++++++++++
3 files changed, 178 insertions(+)
diff --git a/mlcustomize/Makefile.am b/mlcustomize/Makefile.am
index cd7d8971ee06..4e2606471136 100644
--- a/mlcustomize/Makefile.am
+++ b/mlcustomize/Makefile.am
@@ -38,10 +38,12 @@ generator_built = \
SOURCES_MLI = \
firstboot.mli \
+ guest_packages.mli \
SELinux_relabel.mli
SOURCES_ML = \
firstboot.ml \
+ guest_packages.ml \
SELinux_relabel.ml
if HAVE_OCAML
diff --git a/mlcustomize/guest_packages.mli b/mlcustomize/guest_packages.mli
new file mode 100644
index 000000000000..7504a6ab4d3e
--- /dev/null
+++ b/mlcustomize/guest_packages.mli
@@ -0,0 +1,44 @@
+(* virt-customize
+ * Copyright (C) 2012-2021 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *)
+
+exception Unknown_package_manager of string
+exception Unimplemented_package_manager of string
+(** For all three functions below, [package_management] determines the package
+ management system in use by the guest; commonly it should be filled in from
+ [Guestfs.inspect_get_package_management], or the equivalent guestfs object
+ method.
+
+ If [package_management] is unknown or unimplemented, the functions raise
+ [Unknown_package_manager "error message"] or [Unimplemented_package_manager
+ "error message"], correspondingly. *)
+
+val install_command : string list -> string -> string
+(** [install_command packages package_management] produces a properly quoted
+ shell command string suitable for execution in the guest (directly or via a
+ Firstboot script) for installing the OS packages listed in [packages]. *)
+
+val update_command : string -> string
+(** [update_command package_management] produces a properly quoted shell command
+ string suitable for execution in the guest (directly or via a Firstboot
+ script) for updating the OS packages that are currently installed in the
+ guest. *)
+
+val uninstall_command : string list -> string -> string
+(** [uninstall_command packages package_management] produces a properly quoted
+ shell command string suitable for execution in the guest (directly or via a
+ Firstboot script) for uninstalling the OS packages listed in [packages]. *)
diff --git a/mlcustomize/guest_packages.ml b/mlcustomize/guest_packages.ml
new file mode 100644
index 000000000000..4c3c34ed5fcd
--- /dev/null
+++ b/mlcustomize/guest_packages.ml
@@ -0,0 +1,132 @@
+(* virt-customize
+ * Copyright (C) 2012-2021 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *)
+
+open Printf
+
+open Common_gettext.Gettext
+open Std_utils
+
+exception Unknown_package_manager of string
+exception Unimplemented_package_manager of string
+
+(* Windows has package_management == "unknown". *)
+let error_unknown_package_manager flag =
+ let msg = sprintf (f_"cannot use ‘%s’ because no package manager has been \
+ detected for this guest OS.\n\nIf this guest OS is a \
+ common one with ordinary package management then this \
+ may have been caused by a failure of libguestfs \
+ inspection.\n\nFor OSes such as Windows that lack \
+ package management, this is not possible. Try using \
+ one of the ‘--firstboot*’ flags instead (described in \
+ the virt-customize(1) manual).") flag in
+ raise (Unknown_package_manager msg)
+
+let error_unimplemented_package_manager flag pm =
+ let msg = sprintf (f_"sorry, ‘%s’ with the ‘%s’ package manager has not \
+ been implemented yet.\n\nYou can work around this by \
+ using one of the ‘--run*’ or ‘--firstboot*’ options \
+ instead (described in the virt-customize(1) manual).")
+ flag pm in
+ raise (Unimplemented_package_manager msg)
+
+(* http://distrowatch.com/dwres.php?resource=package-management *)
+let install_command packages package_management =
+ let quoted_args = String.concat " " (List.map quote packages) in
+ match package_management with
+ | "apk" ->
+ sprintf "
+ apk update
+ apk add %s
+ " quoted_args
+ | "apt" ->
+ (* http://unix.stackexchange.com/questions/22820 *)
+ sprintf "
+ export DEBIAN_FRONTEND=noninteractive
+ apt_opts='-q -y -o Dpkg::Options::=--force-confnew'
+ apt-get $apt_opts update
+ apt-get $apt_opts install %s
+ " quoted_args
+ | "dnf" ->
+ sprintf "dnf%s -y install %s"
+ (if verbose () then " --verbose" else "")
+ quoted_args
+ | "pisi" -> sprintf "pisi it %s" quoted_args
+ | "pacman" -> sprintf "pacman -S --noconfirm %s" quoted_args
+ | "urpmi" -> sprintf "urpmi %s" quoted_args
+ | "xbps" -> sprintf "xbps-install -Sy %s" quoted_args
+ | "yum" -> sprintf "yum -y install %s" quoted_args
+ | "zypper" -> sprintf "zypper -n in -l %s" quoted_args
+
+ | "unknown" ->
+ error_unknown_package_manager (s_"--install")
+ | pm ->
+ error_unimplemented_package_manager (s_"--install") pm
+
+let update_command package_management =
+ match package_management with
+ | "apk" ->
+ "
+ apk update
+ apk upgrade
+ "
+ | "apt" ->
+ (* http://unix.stackexchange.com/questions/22820 *)
+ "
+ export DEBIAN_FRONTEND=noninteractive
+ apt_opts='-q -y -o Dpkg::Options::=--force-confnew'
+ apt-get $apt_opts update
+ apt-get $apt_opts upgrade
+ "
+ | "dnf" ->
+ sprintf "dnf%s -y --best upgrade"
+ (if verbose () then " --verbose" else "")
+ | "pisi" -> "pisi upgrade"
+ | "pacman" -> "pacman -Su"
+ | "urpmi" -> "urpmi --auto-select"
+ | "xbps" -> "xbps-install -Suy"
+ | "yum" -> "yum -y update"
+ | "zypper" -> "zypper -n update -l"
+
+ | "unknown" ->
+ error_unknown_package_manager (s_"--update")
+ | pm ->
+ error_unimplemented_package_manager (s_"--update") pm
+
+let uninstall_command packages package_management =
+ let quoted_args = String.concat " " (List.map quote packages) in
+ match package_management with
+ | "apk" -> sprintf "apk del %s" quoted_args
+ | "apt" ->
+ (* http://unix.stackexchange.com/questions/22820 *)
+ sprintf "
+ export DEBIAN_FRONTEND=noninteractive
+ apt_opts='-q -y -o Dpkg::Options::=--force-confnew'
+ apt-get $apt_opts remove %s
+ " quoted_args
+ | "dnf" -> sprintf "dnf -y remove %s" quoted_args
+ | "pisi" -> sprintf "pisi rm %s" quoted_args
+ | "pacman" -> sprintf "pacman -R %s" quoted_args
+ | "urpmi" -> sprintf "urpme %s" quoted_args
+ | "xbps" -> sprintf "xbps-remove -Sy %s" quoted_args
+ | "yum" -> sprintf "yum -y remove %s" quoted_args
+ | "zypper" -> sprintf "zypper -n rm %s" quoted_args
+
+ | "unknown" ->
+ error_unknown_package_manager (s_"--uninstall")
+ | pm ->
+ error_unimplemented_package_manager (s_"--uninstall") pm
--
2.19.1.3.g30247aa5d201
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