Add packaging tooling

* regenerate-from-spec: Regenerate tool-generated sources referred to in a spec file
* go-vendor-update: An alias that replicates the parameters used by go2rpm to generate the vendor archive and configuration. It is used in the above regenerate script.
* verify_source_checksum rpm macro: Validate that the checksums in a sources file included in a spec matches the unpacked files.

README.md

@@ -1,3 +1,7 @@
 # demus-packaging-utils
 
-Aliases and scripts to assist in rpm packaging workflows
+Aliases, scripts and rpm macros to assist in rpm packaging workflows
+
+* regenerate-from-spec: Regenerate tool-generated sources referred to in a spec file
+* go-vendor-update: An alias that replicates the parameters used by go2rpm to generate the vendor archive and configuration. It is used in the above regenerate script.
+* verify_source_checksum rpm macro: Validate that the checksums in a sources file included in a spec matches the unpacked files.

demus-packaging-utils.spec

@@ -0,0 +1,48 @@
+Name:       demus-packaging-utils
+Version:    0.1.0
+Release:    %autorelease
+Summary:    Aliases and scripts to assist in rpm packaging workflows
+
+License:    GPL3
+Source:     go-vendor-update.sh
+Source:     regenerate-from-spec.sh
+Source:     macros.demus-packaging
+Source:     LICENSE
+Source:     README.md
+
+Requires:   bash go-vendor-tools
+
+BuildArch:  noarch
+
+%description
+* Alias to regenerate vendor archive in a go2rpm spec generated with the vendor profile
+
+%global regen_basename %(basename "%{S:1}" .sh)
+
+%prep
+%if %{exists:%{S:2}}
+    %{load:%{S:2}}
+    %verify_source_checksum
+%endif
+
+%build
+
+%install
+%{__install} -m 0755 -d     %{buildroot}%{_sysconfdir}/profile.d
+%{__install} -m 0755 -d     %{buildroot}%{_bindir}
+%{__install} -m 0755 -d     %{buildroot}%{_rpmmacrodir}
+
+%{__install} -p -m 644 -t   %{buildroot}%{_sysconfdir}/profile.d    %{S:0}
+%{__install} -p -m 755      %{S:1}                                  %{buildroot}%{_bindir}/%regen_basename
+%{__install} -p -m 755      %{S:2}                                  %{buildroot}%{_rpmmacrodir}/
+%{__install} -p -m 644      %{S:3} %{S:4}                           %{_builddir}
+
+%files
+%doc README.md
+%license LICENSE
+%{_sysconfdir}/profile.d/*
+%{_bindir}/%regen_basename
+%{_rpmmacrodir}/*
+
+%changelog
+%autochangelog

go-vendor-update.sh

@@ -0,0 +1,2 @@
+# Update go vendor archive and config emulating the way go2rpm does it
+alias go-vendor-update='go_vendor_archive create --config go-vendor-tools.toml --write-config '

macros.demus-packaging

@@ -0,0 +1,11 @@
+# Verify that the checksums listed in the given file match the checksums of the files in the current directory.
+# If the checksum doesn't match an message is printed and the subshell is exited with a non-zero status,
+# in order to fail the build.
+# The macro should be the first statement in the %prep section.
+#
+# Control variables, flags and arguments:
+#   -s           path to the file containing the list of checksums. If not provided, the default value is 'sources'
+%verify_source_checksum(s:) %{expand:
+    %define checksumresult %{expand:%(cksum --check --quiet "%{-s:%{-s*}}%{!-s:sources}" 2>/dev/null)}
+    %[ %{len:%checksumresult} > 0 ? "echo -e 'ERROR: Checksums do not match\\n%{checksumresult}'; exit 1" : "%{nil}" ]
+}

regenerate-from-spec.sh

@@ -0,0 +1,23 @@
+#!/bin/bash
+# Update various generated artifacts in rpm packages
+# * Go vendor archive and config
+# * COPR source file
+
+shopt -s extglob
+
+if [ $# -ne 1 ] || ! [[ "$1" =~ .*.\.spec$ ]]; then
+    echo "Please provide one .spec file"
+    echo "Usage: regenerate-from-spec <specfile>.spec"
+    exit 1
+fi
+
+if grep -q go-vendor-tools.toml "$1"; then
+    echo Updating go vendor archive
+    go-vendor-update "$1"
+fi
+
+# Update the sources checksums
+# We assume all files are lowercase except README and LICENSE files
+echo Calculating checksums
+cksum -a sha512 {[a-z],README*,LICENSE*}!(ources) > sources
+echo Done

sources

@@ -0,0 +1,6 @@
+SHA512 (demus-packaging-utils.spec) = 42deb38489e0c6b72b7556263ebffe6d55faa730027201379f7e7cb989b4faeed05c590d69914e5bc635ecb420dddc42710a546e972db2730695b2c3e40b4350
+SHA512 (go-vendor-update.sh) = 4ba1a21e84d91d37e66a7ade8eea09bb278ac87d8ea731420c0f56064424cbcc43e1d1f3d80b727472c6a6adeaefb22c909e949b7009c0f6e6bb7c3ace9268dc
+SHA512 (macros.demus-packaging) = 84bd7b1e4f55a3603f96bc55df4cf1b4103a15dbcdea04b39978da0878f35abae4972b8d43aba5fe19eb45a238244ca2b1b782fa5dbc1300e0b738cbe807b8f5
+SHA512 (regenerate-from-spec.sh) = 4ff702f94a97aa99a4ec8a4e899ef09e08ce8217eb0212c60a533677da46669ed7b56d26e6243fbd24de2ceba9480a62de84ed8be01223744da75433fa77341f
+SHA512 (README.md) = 72a6f0085fea6d2b5736c4fa98f31db8fb42462db6fe65d44de7e99405982cc2330e270f6fb042d598d4136bd2a933e226ae85fb99828e07af6ab2b74a5c89f2
+SHA512 (LICENSE) = ccb0f3b838dff6254510f19c2bd6f5c48e38b8c40a5bf93d38482f4fb31015823741d3f160b6836ec99bd8f4e6c5fa9a5c9196ecdd7775b793f3ada50467aabd