MEN-5410: Fallback to old version strings when package is missing

Otherwise won't be possible to install old versions published with the
old schema.

Amends commit b196804

Changelog: None

Signed-off-by: Lluis Campos <lluis.campos@northern.tech>

modules/deb.sh

@@ -82,11 +82,17 @@ function deb_from_repo_pool_get()  {
     local -r deb_package_path="pool/${component}/${initial}/${package}/${package}_${version}_${architecture}.deb"
 
     local -r filename=$(basename $deb_package_path)
-    run_and_log_cmd "wget -Nq ${repo_url}/${deb_package_path} -P ${download_dir}"
+    run_and_log_cmd_noexit "wget -Nq ${repo_url}/${deb_package_path} -P ${download_dir}"
+    local exit_code=$?
 
     rm -f /tmp/Packages
+    if [[ ${exit_code} -ne 0 ]]; then
+        log_warn "Could not download ${filename}"
+        echo ""
+    else
         log_info "Successfully downloaded ${filename}"
         echo ${filename}
+    fi
 }
 
 # Extract the binary files of a deb package into a directory
@@ -145,6 +151,13 @@ function deb_get_and_install_pacakge() {
     else
         local debian_version="-1+${deb_distro}+${deb_codename}"
         DEB_NAME=$(deb_from_repo_pool_get "work/deb-packages" ${MENDER_APT_REPO_URL} ${deb_arch} "${package}" "${version}${debian_version}")
+        if [[ -z "${DEB_NAME}" ]]; then
+            local debian_version_fallback="-1"
+            DEB_NAME=$(deb_from_repo_pool_get "work/deb-packages" ${MENDER_APT_REPO_URL} ${deb_arch} "${package}" "${version}${debian_version_fallback}")
+            if [[ -z "${DEB_NAME}" ]]; then
+                log_fatal "Specified version for ${package} cannot be found, tried ${version}${debian_version} and ${version}${debian_version_fallback}"
+            fi
+        fi
     fi
     deb_extract_package "work/deb-packages/${DEB_NAME}" "work/rootfs/"
 }

modules/run.sh

@@ -1,6 +1,6 @@
 #!/usr/bin/env bash
 #
-# Copyright 2019 Northern.tech AS
+# Copyright 2022 Northern.tech AS
 #
 #  Licensed under the Apache License, Version 2.0 (the "License");
 #  you may not use this file except in compliance with the License.
@@ -14,7 +14,7 @@
 #  See the License for the specific language governing permissions and
 #  limitations under the License.
 
-# Run a command, capture output and log it
+# Run a command, capture and log output, and exit on non-zero return code
 #
 #  $1 - command to run
 function run_and_log_cmd() {
@@ -31,3 +31,19 @@ function run_and_log_cmd() {
         exit ${exit_code}
     fi
 }
+
+# Run a command, capture and log output, and return the command's return code
+#
+#  $1 - command to run
+function run_and_log_cmd_noexit() {
+    local -r cmd="${1}"
+    local -r position="(${BASH_SOURCE[1]}:${BASH_LINENO[0]}): ${FUNCNAME[0]:+${FUNCNAME[0]}(): }"
+    local exit_code=0
+    output="$({ eval ${cmd}; } 2>&1)" || exit_code=$?
+    local log_msg="Running: ${position} \n\r\n\r\t${cmd}"
+    if [[ "${output}" != "" ]]; then
+        log_msg="${log_msg}\n\t${output}\n"
+    fi
+    log_debug "${log_msg}"
+    return ${exit_code}
+}