From 120e00ea2e0e4a65829d0fe5541d76d0b337c0a4 Mon Sep 17 00:00:00 2001
From: Sarah Vaupel <sarah.vaupel@uniworx.de>
Date: Mon, 16 Sep 2024 01:51:13 +0200
Subject: [PATCH] ci(gitlab-ci): pull frontend artifacts from backend
 downstream pipeline

---
 .gitlab-ci.yml                        |  2 +-
 .gitlab-ci/backend.yml                |  4 +++
 .gitlab-ci/pull-frontend-artifacts.pl | 52 +++++++++++++++++++++++++++
 3 files changed, 57 insertions(+), 1 deletion(-)
 create mode 100755 .gitlab-ci/pull-frontend-artifacts.pl

diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9d6c68047..c4bd76f1e 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -67,7 +67,7 @@ setup:dynamic:
     - BACKEND_IMAGE_VERSION=`${GIT_LOG_COMMAND} ${BACKEND_IMAGE_DEPENDENCIES} | tee backend-image-version`
     - 'echo "FRONTEND_IMAGE_VERSION: ${FRONTEND_IMAGE_VERSION}, BACKEND_IMAGE_VERSION: ${BACKEND_IMAGE_VERSION}"'
     - cat .gitlab-ci/frontend.yml | .gitlab-ci/dynamci.pl FRONTEND_IMAGE_VERSION=${FRONTEND_IMAGE_VERSION} > frontend.yml
-    - cat .gitlab-ci/backend.yml | .gitlab-ci/dynamci.pl BACKEND_IMAGE_VERSION=${BACKEND_IMAGE_VERSION} > backend.yml
+    - cat .gitlab-ci/backend.yml | .gitlab-ci/dynamci.pl BACKEND_IMAGE_VERSION=${BACKEND_IMAGE_VERSION} PARENT_PIPELINE_ID=${CI_PIPELINE_ID} > backend.yml
   artifacts:
     paths:
       - frontend-image-version
diff --git a/.gitlab-ci/backend.yml b/.gitlab-ci/backend.yml
index e951ba3b6..beb349b68 100644
--- a/.gitlab-ci/backend.yml
+++ b/.gitlab-ci/backend.yml
@@ -13,6 +13,7 @@
 
 variables:
   BACKEND_IMAGE_VERSION: #dyn#
+  PARENT_PIPELINE_ID: #dyn#
 
 stages:
   - compile
@@ -26,6 +27,9 @@ default:
     entrypoint: [""]
     docker:
       platform: x86_64
+  before_script:
+    - ./.gitlab-ci/pull-frontend-artifacts.pl "${REGISTRY_AUTH_TOKEN}" "${PARENT_PIPELINE_ID}"
+    - unzip ./.artifacts.tmp/artifacts.zip
   artifacts:
     name: "${CI_JOB_NAME}-${CI_COMMIT_SHORT_SHA}"
     expire_in: "1 day"
diff --git a/.gitlab-ci/pull-frontend-artifacts.pl b/.gitlab-ci/pull-frontend-artifacts.pl
new file mode 100755
index 000000000..8c6c9e457
--- /dev/null
+++ b/.gitlab-ci/pull-frontend-artifacts.pl
@@ -0,0 +1,52 @@
+#!/usr/bin/env perl
+
+use strict;
+use warnings;
+
+my $dir = ".artifacts.tmp";
+my ($token, $id) = @ARGV;
+die "usage: $0 [token] [id]" unless defined $token and defined $id;
+die "id in bad format" unless $id=~m#^[0-9]+$#;
+
+if(!-d $dir) {
+  mkdir($dir) or die "Cannot create directory '$dir', because: $!\n";
+}
+
+system(qq(curl --globoff --header "PRIVATE-TOKEN: $token" "https://gitlab.uniworx.de/api/v4/projects/5/pipelines/$id/bridges" > $dir/bridges));
+my $pips = pparse("$dir/bridges", {id=>qq#."downstream_pipeline"."id"#}, {name=>""});
+
+my $fe = $pips->{frontend}{id};
+
+die "No frontend pipeline found!" unless $fe;
+
+system(qq(curl --globoff --header "PRIVATE-TOKEN: $token" "https://gitlab.uniworx.de/api/v4/projects/5/pipelines/$fe/jobs" > $dir/fe-jobs));
+my $arte = pparse("$dir/fe-jobs", {id=>""}, {name=>"", web_url=>"", artifacts=>""});
+
+system(qq#curl --output $dir/artifacts.zip --location --header "PRIVATE-TOKEN: $token" "https://gitlab.uniworx.de/api/v4/projects/5/jobs/$arte->{compile}{id}/artifacts"#);
+
+
+sub pparse {
+  my ($file, $numerical, $alpha) = @_;
+  my %all = ();
+  for my $k(keys %$numerical) {
+    $all{$k} = $numerical->{$k} || qq#."$k"#;
+  }
+  for my $k(keys %$alpha) {
+    $all{$k} = $alpha->{$k} || qq#."$k"#;
+  }
+  my $select = join ', ', map {qq#"$_": $all{$_}#} sort keys %all;
+  my $cont = qx(cat $file | jq -c '.[] | {$select}');
+  my @cont = split m/\R/, $cont;
+  my %ret = ();
+  for my $c(@cont) {
+    my %block = ();
+    for(keys %$numerical) {
+      $block{$_} = $1 if $c=~m#"$_":([0-9]+)#;
+    }
+    for(keys %$alpha) {
+      $block{$_} = $1 if $c=~m#"$_":"([^"]*)"#;
+    }
+    $ret{$block{name}} =\%block;
+  }
+  return \%ret
+}
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