epm install/upgrade/download/downgrade: use temporary APT directory for tasks

bin/epm-downgrade

@@ -89,16 +89,14 @@ __epm_downgrade_to_alt_archive()
 {
     local date="$(echo "$1" | cut -d/ -f2)"
     shift
+    # normalize date: 2023-01-15 -> 2023/01/15
+    local datestr="$(echo "$date" | sed -e 's|-|/|g')"
+    echo "$datestr" | grep -qE "^20[0-3][0-9]/[01][0-9]/[0-3][0-9]$" || fatal "use follow date format: 2017/01/31 or 2017-01-31"
     __epm_add_alt_apt_downgrade_preferences || return
-    load_helper epm-reposave
-    try_change_alt_repo
-    docmd epm repo set archive "$date" || return
-    load_helper epm-update
+    load_helper epm-sh-backend
     load_helper epm-upgrade
-    __epm_update
+    __use_tmp_apt_for_branch archive "$(echo "$DISTRVERSION" | tr '[:upper:]' '[:lower:]')" "$datestr" || return 1
     epm_upgrade "$@"
-    docmd epm repo restore
-    end_change_alt_repo
     __epm_remove_apt_downgrade_preferences
     return
 }

bin/epm-download

@@ -243,23 +243,21 @@ __epm_download_alt()
 
     # TODO: enable if install --download-only will works
     if is_taskarg "$@" ; then
-        load_helper epm-addrepo
-        load_helper epm-reposave
-        load_helper epm-removerepo
-        load_helper epm-update
-        load_helper epm-install
+        load_helper epm-sh-backend
+        local task_numbers=""
+        local arg
+        for arg in "$@" ; do
+            local tn="$(get_tasknumber_from_arg "$arg")"
+            [ -n "$tn" ] && task_numbers="$task_numbers $tn"
+        done
 
         local installlist="$(get_task_packages $*)"
         installlist="$(estrlist reg_exclude ".*-devel .*-devel-static .*-checkinstall .*-debuginfo" "$installlist")"
         [ -n "$verbose" ] && info 'Packages from task(s): $installlist'
 
-        try_change_alt_repo
-        epm_addrepo "$@"
-        epm update
-        [ -n "$verbose" ] && epm repo list
-        docmd epm download $print_url $installlist
-        epm_removerepo "$@"
-        end_change_alt_repo
+        __use_tmp_apt_for_tasks $task_numbers || return 1
+        [ -n "$verbose" ] && cat "$__EPM_APT_TMPDIR/sources.list"
+        epm_download $installlist
 
         return
     fi

bin/epm-install-alt

@@ -272,6 +272,14 @@ epm_install_alt_kernel_module()
 
 epm_install_alt_names()
 {
+    [ -z "$1" ] && return
+
+    # check repo/package syntax (p10/pkg, sisyphus/pkg)
+    if __has_repo_syntax "$@" ; then
+        __process_repo_arguments epm_install_alt_names "$@"
+        return
+    fi
+
     local kmlist=''
     local kilist=''
     local installnames=''
@@ -305,10 +313,13 @@ epm_install_alt_names()
     epm_install_alt_kernel_module $kmlist || return
 
     # install kernel images via update-kernel (handles modules automatically)
-    local flavour
-    for flavour in $kilist ; do
-        docmd epm update-kernel -t "$flavour" || return
-    done
+    if [ -n "$kilist" ] ; then
+        load_helper epm-kernel_update
+        local flavour
+        for flavour in $kilist ; do
+            epm_kernel_update -t "$flavour" || return
+        done
+    fi
 }
 
 # Unused hack for apt-repo
@@ -368,10 +379,6 @@ prepare_task_packages()
 # copied from epm_upgrade_alt_tasks()
 epm_install_alt_tasks()
 {
-    load_helper epm-addrepo
-    load_helper epm-reposave
-    load_helper epm-removerepo
-    load_helper epm-update
     load_helper epm-install
 
     prepare_task_packages "$@"
@@ -399,16 +406,8 @@ epm_install_alt_tasks()
     fi
 
     local res
-    try_change_alt_repo
-    epm_addrepo $unique_tasks
-    __epm_update
+    __use_tmp_apt_for_tasks $unique_tasks || return 1
     (pkg_names="$installlist" epm_install)
     res=$?
-    # remove repos one by one (epm_removerepo doesn't handle lists)
-    local task
-    for task in $unique_tasks ; do
-        epm_removerepo $task
-    done
-    end_change_alt_repo
     return $res
 }

bin/epm-sh-backend

@@ -203,7 +203,8 @@ __use_tmp_apt_for_tasks()
     load_helper epm-update
     __setup_tmp_apt_dir
     { __get_system_sourceslist ; __generate_task_sourceslist "$@" ; } > "$__EPM_APT_TMPDIR/sources.list"
-    __epm_update || { warning "Failed to update package index for tasks" ; return 1 ; }
+    # tolerate partial failures (some system repos may have broken GPG keys etc.)
+    __epm_update || warning "Some repos failed to update, but continuing anyway"
 }
 
 # call: __process_repo_arguments <function> args...

bin/epm-upgrade

@@ -39,10 +39,7 @@ __check_upgrade_conditions()
 
 epm_upgrade_alt_tasks()
 {
-    load_helper epm-addrepo
-    load_helper epm-reposave
-    load_helper epm-removerepo
-    load_helper epm-update
+    load_helper epm-sh-backend
     load_helper epm-install
 
     local installlist="$(get_task_packages "$@")"
@@ -64,14 +61,17 @@ epm_upgrade_alt_tasks()
         return 22
     fi
 
+    local task_numbers=""
+    local arg
+    for arg in "$@" ; do
+        local tn="$(get_tasknumber_from_arg "$arg")"
+        [ -n "$tn" ] && task_numbers="$task_numbers $tn"
+    done
+
     local res
-    try_change_alt_repo
-    epm_addrepo "$@"
-    __epm_update
+    __use_tmp_apt_for_tasks $task_numbers || return 1
     (pkg_names="$installlist" epm_install)
     res=$?
-    epm_removerepo "$@"
-    end_change_alt_repo
     return $res
 }
 
@@ -163,7 +163,7 @@ __epm_upgrade_do()
             __epm_alt_download_to_cache $APTOPTIONS dist-upgrade
         fi
 
-        CMD="apt-get $APTOPTIONS $noremove $force_yes dist-upgrade"
+        CMD="apt-get $__EPM_APT_REPO_OPTIONS $APTOPTIONS $noremove $force_yes dist-upgrade"
         ;;
     apm-rpm)
         CMD="apm system upgrade"