feat: build and sign RPM packages

Passing files to Dom0 is always dangerous:

- Passing a git repository is dangerous as it can have ignored modified
  files and signature verification will pass.
- Passing an archive is troublesome for updates.
- Passing an RPM package depends on the RPM verification to be correct,
  some times it is not.
- Passing a RPM repository definition is less troublesome for the user,
  as it is a small file to verify the contents and update mechanism is
  via the package manager. Trust in RPM verification is still required.

Many improvements were made to the build scripts:

- requires-program: Single function to check if program is installed;
- spec-get: Sort project names for the usage message;
- spec-get: Only running commands that are necessary;
- spec-get: Fix empty summary when readme has copyright header;
- spec-gen: Fix grep warning of escaped symbol;
- spec-build: Sign RPM and verify signature;
- spec-build: Only lint the first SPEC for faster runtime;
- yumrepo-gen: Generate a local yum repository with signed metadata;
- qubesbuilder-gen: Generate a .qubesbuilder based on tracked projects;
- release: Build, sign and push all RPMs to repository.

Goal is to be able to build with qubes-builderv2 Qubes Executor.

For: https://github.com/ben-grande/qusal/issues/37

.pre-commit-config.yaml

@@ -43,3 +43,9 @@ repos:
         args: [--staged, --msg-filename]
         stages: [commit-msg]
         description: Lint Git commits
+
+      - id: qubesbuilder
+        name: qubesbuilder
+        entry: scripts/qubesbuilder-gen.sh test
+        language: script
+        description: Check if .qubesbuilder is up to date

.qubesbuilder

@@ -0,0 +1,59 @@
+# SPDX-FileCopyrightText: 2024 Benjamin Grande M. S. <ben.grande.b@gmail.com>
+#
+# SPDX-License-Identifier: MIT
+# vim: ft=yaml
+---
+host:
+  rpm:
+    build:
+      - rpm_spec/qusal-ansible.spec
+      - rpm_spec/qusal-browser.spec
+      - rpm_spec/qusal-debian.spec
+      - rpm_spec/qusal-debian-minimal.spec
+      - rpm_spec/qusal-debian-xfce.spec
+      - rpm_spec/qusal-dev.spec
+      - rpm_spec/qusal-docker.spec
+      - rpm_spec/qusal-dom0.spec
+      - rpm_spec/qusal-dotfiles.spec
+      - rpm_spec/qusal-electrum.spec
+      - rpm_spec/qusal-element.spec
+      - rpm_spec/qusal-fedora.spec
+      - rpm_spec/qusal-fedora-minimal.spec
+      - rpm_spec/qusal-fedora-xfce.spec
+      - rpm_spec/qusal-fetcher.spec
+      - rpm_spec/qusal-kicksecure-minimal.spec
+      - rpm_spec/qusal-mail.spec
+      - rpm_spec/qusal-media.spec
+      - rpm_spec/qusal-mgmt.spec
+      - rpm_spec/qusal-mirage-builder.spec
+      - rpm_spec/qusal-opentofu.spec
+      - rpm_spec/qusal-qubes-builder.spec
+      - rpm_spec/qusal-reader.spec
+      - rpm_spec/qusal-remmina.spec
+      - rpm_spec/qusal-signal.spec
+      - rpm_spec/qusal-ssh.spec
+      - rpm_spec/qusal-sys-audio.spec
+      - rpm_spec/qusal-sys-bitcoin.spec
+      - rpm_spec/qusal-sys-cacher.spec
+      - rpm_spec/qusal-sys-electrs.spec
+      - rpm_spec/qusal-sys-electrumx.spec
+      - rpm_spec/qusal-sys-firewall.spec
+      - rpm_spec/qusal-sys-git.spec
+      - rpm_spec/qusal-sys-mirage-firewall.spec
+      - rpm_spec/qusal-sys-net.spec
+      - rpm_spec/qusal-sys-pgp.spec
+      - rpm_spec/qusal-sys-pihole.spec
+      - rpm_spec/qusal-sys-print.spec
+      - rpm_spec/qusal-sys-rsync.spec
+      - rpm_spec/qusal-sys-ssh.spec
+      - rpm_spec/qusal-sys-ssh-agent.spec
+      - rpm_spec/qusal-sys-syncthing.spec
+      - rpm_spec/qusal-sys-usb.spec
+      - rpm_spec/qusal-sys-wireguard.spec
+      - rpm_spec/qusal-terraform.spec
+      - rpm_spec/qusal-usb.spec
+      - rpm_spec/qusal-utils.spec
+      - rpm_spec/qusal-vault.spec
+      - rpm_spec/qusal-video-companion.spec
+      - rpm_spec/qusal-whonix-gateway.spec
+      - rpm_spec/qusal-whonix-workstation.spec

.qubesbuilder.template

@@ -0,0 +1,9 @@
+# SPDX-FileCopyrightText: 2024 Benjamin Grande M. S. <ben.grande.b@gmail.com>
+#
+# SPDX-License-Identifier: MIT
+# vim: ft=yaml
+---
+host:
+  rpm:
+    build:
+      @SPEC@

rpm_spec/template/template.spec

@@ -6,7 +6,6 @@
 %define my_name        %(./scripts/spec-get.sh @PROJECT@ name)
 %define branch         %(./scripts/spec-get.sh @PROJECT@ branch)
 %define project        %(./scripts/spec-get.sh @PROJECT@ project)
-%define release        %(./scripts/spec-get.sh @PROJECT@ release)
 %define summary        %(./scripts/spec-get.sh @PROJECT@ summary)
 %define group          %(./scripts/spec-get.sh @PROJECT@ group)
 %define vendor         %(./scripts/spec-get.sh @PROJECT@ vendor)
@@ -17,7 +16,7 @@
 
 Name:           %{project}
 Version:        @VERSION@
-Release:        %autorelease
+Release:        1%{?dist}
 Summary:        %{summary}
 
 Group:          %{group}
@@ -25,7 +24,10 @@ Vendor:         %{vendor}
 License:        %{license}
 URL:            %{url}
 Source0:        %{project}
+BuildArch:      noarch
 
+Requires:       qubes-mgmt-salt
+Requires:       qubes-mgmt-salt-dom0
 @REQUIRES@
 
 %description
@@ -37,7 +39,9 @@ Source0:        %{project}
 
 %install
 rm -rf %{buildroot}
-mkdir -p %{buildroot}%{file_roots}
+mkdir -p %{buildroot}%{file_roots} %{buildroot}/usr/share/licenses/%{project}
+mv -v %{project}/LICENSES/* %{buildroot}/usr/share/licenses/%{project}/
+rm -rv %{project}/LICENSES
 cp -rv %{project} %{buildroot}%{file_roots}/%{my_name}
 
 %check
@@ -73,10 +77,11 @@ fi
 
 %files
 %defattr(-,root,root,-)
-%license %{file_roots}/%{my_name}/LICENSES/%{license_csv}
+%license /usr/share/licenses/%{project}/*
+%dir %{file_roots}/%{my_name}
 %doc %{file_roots}/%{my_name}/README.md
-%dir %{file_roots}/%{my_name}/*
-%dnl %{file_roots}/%{my_name}/*
+%exclude %{file_roots}/%{my_name}/README.md
+%{file_roots}/%{my_name}/*
 
 %changelog
-%dnl %autochangelog
+@CHANGELOG@

salt/debian-xfce/README.md

@@ -1,4 +1,4 @@
-# debian
+# debian-xfce
 
 Debian Xfce Template in Qubes OS.
 

salt/fedora-xfce/README.md

@@ -1,4 +1,4 @@
-# fedora
+# fedora-xfce
 
 Fedora Xfce Template in Qubes OS.
 

scripts/pgp-expiration.sh

@@ -8,6 +8,10 @@ set -eu
 
 now="$(date +%s)"
 fail="0"
+if test -z "${1-}"; then
+  echo "No file provided" >&2
+  exit 1
+fi
 for key in "${@}"; do
   data="$(gpg --no-keyring --no-auto-check-trustdb --no-autostart \
           --with-colons --show-keys "${key}")"

scripts/qubesbuilder-gen.sh

@@ -0,0 +1,36 @@
+#!/bin/sh
+
+## SPDX-FileCopyrightText: 2024 Benjamin Grande M. S. <ben.grande.b@gmail.com>
+##
+## SPDX-License-Identifier: AGPL-3.0-or-later
+
+set -eu
+
+template=".qubesbuilder.template"
+target=".qubesbuilder"
+intended_target="${target}"
+if test "${1-}" = "test"; then
+  tmpdir="$(mktemp -d)"
+  target="${tmpdir}/.qubesbuilder"
+  trap 'rm -rf -- "${tmpdir}"' EXIT INT HUP QUIT ABRT
+fi
+ignored="$(git ls-files --exclude-standard --others --ignored)"
+untracked="$(git ls-files --exclude-standard --others)"
+unwanted="$(echo "${ignored}" "${untracked}" | grep "^salt/" \
+            | cut -d "/" -f2 | sort -u)"
+group="$(./scripts/spec-get.sh dom0 group)"
+projects="$(find salt/ -mindepth 1 -maxdepth 1 -type d \
+            | sort -d | sed "s|^salt/\(\S\+\)|      - rpm_spec/${group}-\1.spec|")"
+for unwanted_project in ${unwanted}; do
+  projects="$(echo "${projects}" | sed "\@rpm_spec/${group}-${unwanted_project}.spec@d")"
+done
+
+sed -e "/@SPEC@/d" "${template}" | tee "${target}" >/dev/null
+echo "${projects}" | tee -a "${target}" >/dev/null
+if test "${1-}" = "test"; then
+  if ! cmp -s "${target}" "${intended_target}"; then
+    echo "${0##*/}: error: File ${intended_target} is not up to date" >&2
+    echo "${0##*/}: error: Please run '${0##/*}' to update the file" >&2
+    exit 1
+  fi
+fi

scripts/release.sh

@@ -0,0 +1,14 @@
+#!/bin/sh
+
+## SPDX-FileCopyrightText: 2023 - 2024 Benjamin Grande M. S. <ben.grande.b@gmail.com>
+##
+## SPDX-License-Identifier: AGPL-3.0-or-later
+
+set -eu
+
+command -v git >/dev/null || { echo "Missing program: git" >&2; exit 1; }
+cd "$(git rev-parse --show-toplevel)" || exit 1
+
+./scripts/qubesbuilder-gen.sh
+./scripts/spec-build.sh
+./scripts/yumrepo-gen.sh

scripts/requires-program.sh

@@ -0,0 +1,19 @@
+#!/bin/sh
+## SPDX-FileCopyrightText: 2024 Benjamin Grande M. S. <ben.grande.b@gmail.com>
+##
+## SPDX-License-Identifier: AGPL-3.0-or-later
+
+set -eu
+
+missing_program=0
+for pkg in "${@}"; do
+  if ! command -v "${pkg}" >/dev/null; then
+    missing_program=1
+    echo "Missing program: ${pkg}" >&2
+    continue
+  fi
+done
+
+if test "${missing_program}" = "1"; then
+  exit 1
+fi

scripts/salt-lint.sh

@@ -39,8 +39,8 @@ if test -n "${1-}"; then
 fi
 
 case "${find_tool}" in
-  fd|fdfind) files="$(${find_tool} . minion.d/ --extension=conf) $(${find_tool} . salt/ --max-depth=2 --type=f --extension=sls --extension=top)";;
-  find) files="$(find minion.d/ -type f -name "*.conf") $(find salt/* -maxdepth 2 -type f \( -name '*.sls' -o -name '*.top' \))";;
+  fd|fdfind) files="$(${find_tool} . minion.d/ --extension=conf) $(${find_tool} . salt/ --max-depth=2 --type=f --extension=sls --extension=top | sort -d)";;
+  find) files="$(find minion.d/ -type f -name "*.conf") $(find salt/* -maxdepth 2 -type f \( -name '*.sls' -o -name '*.top' \) | sort -d)";;
 esac
 
 exec salt-lint ${conf} ${files}

scripts/spec-build.sh

@@ -1,67 +1,96 @@
 #!/bin/sh
 
-## SPDX-FileCopyrightText: 2023 Benjamin Grande M. S. <ben.grande.b@gmail.com>
+## SPDX-FileCopyrightText: 2023 - 2024 Benjamin Grande M. S. <ben.grande.b@gmail.com>
 ##
 ## SPDX-License-Identifier: AGPL-3.0-or-later
 
 set -eu
 
 usage(){
-  printf '%s\n' "Usage: ${0##*/} PROJECT [release]" >&2
+  echo "Usage: ${0##*/} PROJECT [PROJECT ...]" >&2
   exit 1
 }
 
-case "${1-}" in
-  ""|-*) usage;;
-esac
+build_rpm(){
+  counter=$((counter+1))
+  project="${1}"
+  group="$(${spec_get} "${project}" group)"
+  version="$(${spec_get} "${project}" version)"
+  license_csv="$(${spec_get} "${project}" license_csv)"
+  spec="rpm_spec/${group}-${project}.spec"
 
-release=""
-case "${2-}" in
-  release) release="1";;
-  "") ;;
-  *) usage;;
-esac
+  "${spec_gen}" "${project}"
 
-command -v dnf >/dev/null ||
-  { printf "Missing program: dnf\n" >&2; exit 1; }
-command -v rpmlint >/dev/null ||
-  { printf "Missing program: rpmlint\n" >&2; exit 1; }
-## command -v rpmdev-setuptree >/dev/null ||
-##   { printf "Missing program: rpmdev-setuptree\n" >&2; exit 1; }
-command -v rpmbuild >/dev/null ||
-  { printf "Missing program: rpmbuild\n" >&2; exit 1; }
-command -v git >/dev/null ||
-  { printf "Missing program: git\n" >&2; exit 1; }
-cd "$(git rev-parse --show-toplevel)" || exit 1
+  ## All specs have the same format, only lint the first one.
+  if test "${counter}" = "1"; then
+    rpmlint "${spec}"
+  fi
 
-project="${1}"
-spec_gen="./scripts/spec-gen.sh"
-spec_get="./scripts/spec-get.sh"
-group="$(${spec_get} "${project}" group)"
-spec="rpm_spec/${group}-${project}.spec"
-
-"${spec_gen}" "${project}"
-rpmlint "${spec}"
-
-if grep -q "^BuildRequires: " "${spec}"; then
+  if grep -q "^BuildRequires: " "${spec}"; then
     sudo dnf build-dep "${spec}"
-fi
+  fi
+
+  mkdir -p \
+    "${build_dir}/BUILD/${group}-${project}/LICENSES/" \
+    "${build_dir}/SOURCES/${group}-${project}/LICENSES"
+
+  cp -r "salt/${project}/"* "${build_dir}/BUILD/${group}-${project}/"
+  cp -r "salt/${project}/"* "${build_dir}/SOURCES/${group}-${project}/"
+  for license in $(echo "${license_csv}" | tr "," " "); do
+    license_dir="LICENSES"
+    if test -d "salt/${project}/LICENSES"; then
+      license_dir="salt/${project}/LICENSES"
+    fi
+    cp "${license_dir}/${license}.txt" "${build_dir}/BUILD/${group}-${project}/LICENSES/"
+  done
+
+  ## TODO: use qubes-builderv2 with mock or qubes executor
+  rpmbuild -ba -- "${spec}"
+  if test -n "${key_id}"; then
+    rpm_basename="${build_dir}/RPMS/noarch/${group}-${project}-${version}-"
+    rpm_suffix=".noarch.rpm"
+    ## TODO: target only the latest release
+    rpmsign --key-id="${key_id}" --digest-algo=sha512 --addsign \
+      -- "${rpm_basename}"*"${rpm_suffix}" </dev/null
+    gpg="$(git config --get gpg.program)" || gpg="gpg"
+    dbpath="$(mktemp -d)"
+    trap 'rm -rf -- "${dbpath}"' EXIT INT HUP QUIT ABRT
+    tmp_file="${dbpath}/${key_id}.asc"
+    "${gpg}" --export --armor "${key_id}" | tee "${tmp_file}" >/dev/null
+    rpmkeys --dbpath="${dbpath}" --import "${tmp_file}"
+    ## TODO: target only the latest relase
+    rpm --dbpath="${dbpath}" --checksig --verbose \
+      -- "${rpm_basename}"*"${rpm_suffix}"
+  fi
+}
+
+case "${1-}" in
+  -h|--?help) usage;;
+esac
+
+command -v git >/dev/null || { echo "Missing program: git" >&2; exit 1; }
+cd "$(git rev-parse --show-toplevel)" || exit 1
+./scripts/requires-program.sh dnf rpmlint rpmbuild rpmsign
+build_dir="${HOME}/rpmbuild"
 
 if command -v rpmdev-setuptree >/dev/null; then
   rpmdev-setuptree
 else
-  mkdir -p ~/rpmbuild/BUILD ~/rpmbuild/BUILDROOT ~/rpmbuild/RPMS
-  mkdir -p ~/rpmbuild/SOURCES ~/rpmbuild/SPECS ~/rpmbuild/SRPMS
+  mkdir -p \
+    "${build_dir}/BUILD" "${build_dir}/BUILDROOT" "${build_dir}/RPMS" \
+    "${build_dir}/SOURCES" "${build_dir}/SPECS" "${build_dir}/SRPMS"
 fi
 
-mkdir ~/rpmbuild/BUILD/"${group}-${project}"
-mkdir ~/rpmbuild/SOURCES/"${group}-${project}"
+key_id="$(git config --get user.signingKey)" || true
+spec_gen="./scripts/spec-gen.sh"
+spec_get="./scripts/spec-get.sh"
 
-cp -r "salt/${project}"/* ~/rpmbuild/BUILD/"${group}-${project}"/
-cp -r "salt/${project}"/* ~/rpmbuild/SOURCES/"${group}-${project}"/
-
-if test -n "${release}"; then
-  rpmbuild -ba --sign "${spec}"
-else
-  rpmbuild -ba "${spec}"
+if test -z "${1-}"; then
+  # shellcheck disable=SC2046
+  set -- $(find salt/ -mindepth 1 -maxdepth 1 -type d -printf '%f\n' \
+           | sort -d | tr "\n" " ")
 fi
+counter=0
+for p in "$@"; do
+  build_rpm "${p}"
+done

scripts/spec-gen.sh

@@ -15,8 +15,8 @@ usage(){
 ## Get scriptlet command, else fail safe.
 get_scriptlet(){
   scriptlet="$1"
-  sed -n "/^<\!-- pkg:begin:${scriptlet} -->$/,/^<\!-- pkg:end:${scriptlet} -->$/p" "${readme}" \
-    | grep -v -e '^```\S*$' -e "^<\!-- " | sed "s/^sudo //" || echo "true"
+  sed -n "/^<\!-- pkg:begin:${scriptlet} -->$/,/^<\!-- pkg:end:${scriptlet} -->$/p" \
+    "${readme}" | sed '/^```.*/d;/^<\!-- pkg:/d;s/^sudo //' || echo "true"
 }
 
 get_spec(){
@@ -68,7 +68,7 @@ gen_spec(){
     "${template}" | tee "${target}" >/dev/null
 
   requires_key=""
-  for r in $(printf %s"${requires}" | tr " " "\n"); do
+  for r in $(printf %s"${requires}" | tr " " "\n" | sort -u); do
     requires_key="${requires_key}\nRequires: ${group}-${r}"
   done
   sed -i "s/@REQUIRES@/${requires_key}/" "${target}" >/dev/null
@@ -76,15 +76,19 @@ gen_spec(){
 }
 
 case "${1-}" in
-  ""|-h|--?help) usage; exit 1;;
+  -h|--?help) usage; exit 1;;
 esac
 
-command -v git >/dev/null ||
-  { printf "Missing program: git\n" >&2; exit 1; }
+command -v git >/dev/null || { echo "Missing program: git" >&2; exit 1; }
 cd "$(git rev-parse --show-toplevel)"
 
 spec_get="./scripts/spec-get.sh"
 
+if test -z "${1-}"; then
+  # shellcheck disable=SC2046
+  set -- $(find salt/ -mindepth 1 -maxdepth 1 -type d -printf '%f\n' \
+           | sort -d | tr "\n" " ")
+fi
 for p in "$@"; do
   gen_spec "${p}"
 done

scripts/spec-get.sh

@@ -8,7 +8,8 @@
 set -eu
 
 usage(){
-  names="$(find salt/ -maxdepth 1 -type d | cut -d "/" -f2 | tr "\n" " ")"
+  names="$(find salt/ -mindepth 1 -maxdepth 1 -type d -printf '%f\n' \
+           | sort -d | tr "\n" " ")"
   echo "Usage: ${0##*/} <NAME> <KEY>"
   echo "Example: ${0##*/} qubes-builder description"
   echo "Names: ${names}"
@@ -28,29 +29,34 @@ block_max_chars(){
 
 keys="name branch group file_roots requires vendor url version project project_dir changelog readme license_csv license description summary saltfiles"
 
+name=""
+key=""
 case "${1-}" in
   "") usage; exit 1;;
   -h|--?help) usage; exit 0;;
+  *) name="${1}"; shift;;
 esac
-case "${2-}" in
+case "${1-}" in
   "") usage; exit 1;;
+  *) key="${1}"; shift;;
 esac
+if test -z "${key##* }"; then
+  echo "Key is emtpy: ${key}" >&2
+  exit 1
+fi
 
-command -v reuse >/dev/null ||
-  { printf "Missing program: reuse\n" >&2; exit 1; }
-command -v git >/dev/null ||
-  { printf "Missing program: git\n" >&2; exit 1; }
+command -v git >/dev/null || { echo "Missing program: git" >&2; exit 1; }
 cd "$(git rev-parse --show-toplevel)" || exit 1
+./scripts/requires-program.sh reuse
+
+if test "${key}" = "branch"; then
+  branch="$(git branch --show-current)"
+fi
 
-name="${1}"
-key="${2}"
-branch="$(git branch --show-current)"
 group="qusal"
 block_max_chars group "${group}" 70
-
 file_roots="/srv/salt/${group}"
 vendor="Benjamin Grande"
-
 url="https://github.com/ben-grande/qusal"
 version="1.0"
 
@@ -68,27 +74,33 @@ if ! test -f "${readme}"; then
   exit 1
 fi
 
-license_csv="$(reuse --root "${project_dir}" lint |
+if test "${key}" = "license" || test "${key}" = "license_csv"; then
+  license_csv="$(reuse --root "${project_dir}" lint |
     awk -F ':' '/^* Used licenses:/{print $2}' | tr -d " ")"
-license="$(echo "$license_csv" | sed "s/,/ AND /g")"
-#license="$(reuse --root "${project_dir}" lint |
-#           awk -F ':' '/^* Used licenses:/{print $2}' | sed "s|, | AND |g")"
+  license="$(echo "${license_csv}" | sed "s/,/ AND /g")"
+fi
 
-## The problem with %autochangelog is that it will print logs of all projects
-## and we separate a project per directory.
-## The disadvantage of the changelog below is that it doesn't differentiate
-## commits per package release.
-changelog="$(TZ=UTC0 git log -n 50 --format=format:"* %cd %an <%ae> - %h%n- %s%n%n" --date=format:"%a %b %d %Y" -- "${project_dir}" | sed -re "s/^- +- */- /;/^$/d")"
+## The macro %autochangelog prints logs of all projects and we separate a
+## project per directory. The disadvantage of the changelog below is it
+# #doesn't differentiate commits per version and release, but per commit id.
+if test "${key}" = "changelog"; then
+  changelog="$(TZ=UTC0 git log -n 50 --format=format:"* %cd %an <%ae> - %h%n- %s%n%n" --date=format:"%a %b %d %Y" -- "${project_dir}" | sed -re "s/^- +- */- /;/^$/d")"
+fi
 
-#block_max_chars license "${license}" 70
-description="$(sed -n '/^## Description/,/^## /p' "${readme}" |
+if test "${key}" = "description"; then
+  description="$(sed -n '/^## Description/,/^## /p' "${readme}" |
                 sed '1d;$d' | sed "1{/^$/d}")"
-summary="$(sed -n '3p' "${readme}")"
-block_max_chars summary "${summary}" 70
+fi
 
-saltfiles="$(find "${project_dir}" -maxdepth 1 -name "*.sls")"
-# shellcheck disable=SC2086
-if test -n "${saltfiles}"; then
+if test "${key}" = "summary"; then
+  summary="$(sed -n "/^# ${name}$/,/^## Table of Contents$/{/./!d;/^#/d;p}" "${readme}")"
+  block_max_chars summary "${summary}" 70
+fi
+
+if test "${key}" = "saltfiles" || test "${key}" = "requires"; then
+  saltfiles="$(find "${project_dir}" -maxdepth 1 -name "*.sls")"
+  # shellcheck disable=SC2086
+  if test -n "${saltfiles}"; then
     requires="$(sed -n '/^include:$/,/^\s*$/p' ${saltfiles} | sed "/^\s*- \./d;/{/d" | grep "^\s*- " | cut -d "." -f1 | sort -u | sed "s/- //")"
     if grep -qrn "{%-\? from \('\|\"\)utils" ${saltfiles}; then
       if test -n "${requires}"; then
@@ -97,22 +109,18 @@ if test -n "${saltfiles}"; then
         requires="utils"
       fi
     fi
-else
+  else
     requires=""
-fi
-requires_valid=""
-for r in $(printf %s"${requires}" | tr " " "\n"); do
+  fi
+  requires_valid=""
+  for r in $(printf %s"${requires}" | tr " " "\n"); do
     if ! test -d "salt/${r}"; then
       continue
     fi
     requires_valid="${requires_valid} ${r}"
-done
-requires="${requires_valid}"
-unset requires_valid
-
-if test -z "${key}" || test "$(echo "${key}" | sed "s/ //g")" = ""; then
-  echo "Key has no value: ${key}" >&2
-  exit 1
+  done
+  requires="${requires_valid}"
+  unset requires_valid
 fi
 
 case "${key}" in

scripts/yumrepo-gen.sh

@@ -0,0 +1,31 @@
+#!/bin/sh
+
+## SPDX-FileCopyrightText: 2023 - 2024 Benjamin Grande M. S. <ben.grande.b@gmail.com>
+##
+## SPDX-License-Identifier: AGPL-3.0-or-later
+
+set -eu
+
+command -v git >/dev/null || { echo "Missing program: git" >&2; exit 1; }
+cd "$(git rev-parse --show-toplevel)" || exit 1
+./scripts/requires-program.sh createrepo_c gpg
+
+key_id="$(git config --get user.signingKey)" || true
+build_dir="${HOME}/rpmbuild"
+qubes_release="r4.2"
+repo="current"
+dist="fc37"
+yum_repo_root="$HOME/rpmrepo"
+yum_repo="${yum_repo_root}/${qubes_release}/${repo}/host/${dist}"
+
+mkdir -p "${yum_repo}/rpm"
+find "${build_dir}/RPMS/" -type f -name "*.rpm" \
+  -exec cp {} "${yum_repo}/rpm/" \;
+createrepo_c --checksum sha512 "${yum_repo}"
+if test -n "${key_id}"; then
+  rm -f -- "${yum_repo}/repodata/repomd.xml.asc"
+  gpg --batch --no-tty --detach-sign --armor --local-user "${key_id}" \
+    -- "${yum_repo}/repodata/repomd.xml"
+fi
+
+## TODO: rsync to remote host