actions: add automerge example

lib/api.sh

@@ -0,0 +1,108 @@
+#!/bin/bash
+# Copyright 2024 The Forgejo Authors
+# SPDX-License-Identifier: MIT
+
+API_TMPDIR=$(mktemp -d)
+
+function api_branch_tip() {
+    local api="$1"
+    local repo="$2"
+    local branch="$3"
+
+    retry forgejo-curl.sh api_json $api/repos/$repo/branches/$branch >&/dev/null
+    forgejo-curl.sh api_json $api/repos/$repo/branches/$branch | jq --raw-output .commit.id
+}
+
+function api_pr_is_merged() {
+    local api="$1"
+    local repo="$2"
+    local pr="$3"
+
+    forgejo-curl.sh api_json $api/repos/$repo/pulls/$pr >$API_TMPDIR/pr.json
+    $(jq -r .merged <$API_TMPDIR/pr.json)
+}
+
+function api_pr_delete_all() {
+    local api="$1"
+    local repo="$2"
+
+    forgejo-curl.sh api_json $api/repos/${repo}/pulls | jq --raw-output '.[] | .number' | while read pr; do
+        forgejo-curl.sh api_json -X DELETE $api/repos/${repo}/issues/$pr
+    done
+}
+
+function api_pr_get_status() {
+    local api="$1"
+    local repo="$2"
+    local sha="$3"
+
+    forgejo-curl.sh api_json $api/repos/$repo/commits/$sha/status
+}
+
+function api_pr_check_status() {
+    local api="$1"
+    local repo="$2"
+    local sha="$3"
+    local expected_status="$4"
+    local expected_description="$5"
+
+    api_pr_get_status $api $repo $sha >$API_TMPDIR/status.json
+    local status="$(jq --raw-output .state <$API_TMPDIR/status.json)"
+    local description="$(jq --raw-output .statuses[0].description <$API_TMPDIR/status.json)"
+    if test "$status" = "$expected_status" && test -z "$expected_description" -o "$description" = "$expected_description"; then
+        echo OK
+    elif test "$status" = "failure" -o "$status" = "success"; then
+        echo NOK
+    else
+        echo RETRY
+    fi
+}
+
+function api_pr_wait_success() {
+    api_pr_wait_status success "$@"
+}
+
+function api_pr_wait_failure() {
+    api_pr_wait_status failure "$@"
+}
+
+function api_pr_wait_running() {
+    api_pr_wait_status pending "$@" "Has started running"
+}
+
+function api_pr_wait_log() {
+    local sha="$1" expected_status="$2" expected_description="$3"
+    local status="$(jq --raw-output .state <$API_TMPDIR/status.json)"
+    local description="$(jq --raw-output .statuses[0].description <$API_TMPDIR/status.json)"
+    if test "$expected_description"; then
+        expected_description=" '$expected_description'"
+    fi
+    log_info "$sha status waiting '$expected_status'$expected_description, currently '$status' '$description'"
+}
+
+# default loop delay is 3600 sec (1 hour)
+: ${API_LOOPS:=100}
+: ${API_LOOP_DELAY:=36}
+
+function api_pr_wait_status() {
+    local status="$1"
+    local api="$2"
+    local repo="$3"
+    local sha="$4"
+    local description="$5"
+
+    for i in $(seq $API_LOOPS); do
+        if test $(api_pr_check_status "$api" "$repo" "$sha" "$status" "$description") != RETRY; then
+            break
+        fi
+        api_pr_wait_log "$sha" "$status" "$description"
+        sleep $API_LOOP_DELAY
+    done
+    if test $(api_pr_check_status "$api" "$repo" "$sha" "$status" "$description") = "OK"; then
+        log_info "$sha status OK"
+    else
+        api_pr_get_status $api $repo $sha | jq .statuses
+        log_info "$sha status NOK"
+        return 1
+    fi
+}

lib/lib.sh

@@ -4,6 +4,8 @@
 
 LIB_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
 
+source $LIB_DIR/api.sh
+
 if ${VERBOSE:-false} ; then
     set -ex
     PS4='${BASH_SOURCE[0]}:$LINENO: ${FUNCNAME[0]}:  '