merge: Add script to perform merges with mergebot

This commit adds a simple script that may be used to test mergebot.
The script sends a mergerequest message to mergebot according to the
parameters passed on the commandline, and awaits a merge message in
response.

diff --git a/merge.sh b/merge.sh
new file mode 100755 (executable)
index 0000000..7718b6d
--- /dev/null
+++ b/merge.sh
@@ -0,0 +1,133 @@
+#!/bin/bash
+
+check_result() {
+       local endpoint="$1"
+       local context="$2"
+
+       local start
+       local timelimit
+
+       start=$(date +"%s")
+       timelimit=$((5 * 60))
+
+       while (( ( $(date +"%s") - start ) < timelimit )); do
+               local msg
+               local fmsg
+               local ctx
+               local result
+
+               if ! msg=$(ipc_endpoint_recv "$endpoint" 5); then
+                       continue
+               fi
+
+               if ! fmsg=$(ipc_msg_get_data "$msg"); then
+                       log_warn "Dropping invalid message (no data)"
+                       continue
+               fi
+
+               if ! ctx=$(foundry_msg_merge_get_context "$fmsg"); then
+                       log_warn "Dropping invalid message (no context)"
+                       continue
+               fi
+
+               if [[ "$ctx" != "$context" ]]; then
+                       # message is about a different merge request
+                       continue
+               fi
+
+               if ! result=$(foundry_msg_merge_get_status "$fmsg"); then
+                       log_warn "Could not get result from merge message"
+                       return 1
+               fi
+
+               foundry_context_get_logs "$context" | log_highlight "Merge logs"
+               return "$result"
+
+       done
+
+       return 1
+}
+
+test_mergebot() {
+       local repository="$1"
+       local srcbranch="$2"
+       local dstbranch="$3"
+
+       local endpoint
+       local mergereq
+       local project
+
+       project="${repository##*/}"
+
+       if ! endpoint=$(ipc_endpoint_open); then
+               log_error "Could not open IPC endpoint"
+               return 1
+       fi
+
+       if ! ipc_endpoint_subscribe "$endpoint" "merges"; then
+               log_error "Could not subscribe to merges"
+               return 1
+       fi
+
+       if ! context=$(foundry_context_new "$project"); then
+               log_error "Could not make a new foundry context"
+               return 1
+       fi
+
+       if ! mergereq=$(foundry_msg_mergerequest_new "$context" \
+                                                    "$repository" \
+                                                    "$srcbranch" \
+                                                    "$dstbranch"); then
+               log_error "Could not make mergerequest message"
+               return 1
+       fi
+
+       if ! ipc_endpoint_send "$endpoint" "pub/mergebot" "$mergereq"; then
+               log_error "Could not send mergerequest"
+               return 1
+       fi
+
+       if ! check_result "$endpoint" "$context"; then
+               return 1
+       fi
+
+       return 0
+}
+
+main() {
+       local repository
+       local srcbranch
+       local dstbranch
+
+       opt_add_arg "r" "repository"  "rv" "" "Merge branches in this repository"
+       opt_add_arg "s" "source"      "rv" "" "The branch to merge from"
+       opt_add_arg "d" "destination" "rv" "" "The branch to merge into"
+
+       if ! opt_parse "$@"; then
+               return 1
+       fi
+
+       repository=$(opt_get "repository")
+       srcbranch=$(opt_get "source")
+       dstbranch=$(opt_get "destination")
+
+       if ! test_mergebot "$repository" "$srcbranch" "$dstbranch"; then
+               echo "Could not merge $repository [$srcbranch -> $dstbranch]"
+               return 1
+       fi
+
+       return 0
+}
+
+{
+       if ! . toolbox.sh; then
+               exit 1
+       fi
+
+       if ! include "log" "opt" "ipc" "foundry/msg" "foundry/context"; then
+               exit 1
+       fi
+
+       main "$@"
+       exit "$?"
+}