Support local Go modules

Support using local Go modules inside the Shipyard container by
specifying one or more (colon separated) paths with `LOCAL_MODULES`.

The corresponding Submariner modules will be used from the local
file system instead of being pulled from GitHub.

Signed-off-by: Mike Kolesnik <[email protected]>

.dapper

@@ -3,12 +3,18 @@
 # Pass credential file as read-only, so that the container can use it if necessary
 function pass_credentials() {
  local credentials=$1
- local suffix=$suffix
  local mountpoint=${credentials/$HOME//root}
+ mount_volume "$credentials" "$mountpoint"
+}
+
+function mount_volume() {
+ local volume="$1"
+ local mountpoint="$2"
+ local suffix="$suffix"
 
- [ -r "$credentials" ] || return 0
  [ -z "${suffix}" ] && suffix=':ro' || suffix+=',ro'
- dockerargs+=" -v ${credentials}:${mountpoint}${suffix}"
+ [ -r "$volume" ] || return 0
+ dockerargs+=" -v $(realpath -s ${volume}):${mountpoint}${suffix}"
 }
 
 file=Dockerfile.dapper
@@ -116,6 +122,11 @@ pass_credentials "${HOME}/.aws/credentials"
 # Pass through ~/.gcp/osServiceAccount.json so that the container can operate on GCP (if needed).
 pass_credentials "${HOME}/.gcp/osServiceAccount.json"
 
+# Attempt to mount any local replaces specified in `go.mod`.
+while read -a replace; do
+ mount_volume "${replace[3]}" "${DAPPER_SOURCE}/${replace[3]}"
+done < <(sed -n -e '/\breplace\b/p' go.mod)
+
 # seccomp is unconfined to avoid problems with clone3 in Fedora 35
 # See https://pascalroeleven.nl/2021/09/09/ubuntu-21-10-and-fedora-35-in-docker/
 # Remove "--security-opt seccomp=unconfined" once all supported container runtimes

Makefile.inc

@@ -220,7 +220,7 @@ gitlint:
  fi
 
 # List of vendor/modules.txt files we might encounter
-VENDOR_MODULES := $(shell find . -name vendor -prune -o -name go.mod -printf "%h/vendor/modules.txt\n")
+VENDOR_MODULES := $(shell find . -name vendor -prune -o -writable -name go.mod -printf "%h/vendor/modules.txt\n")
 
 # [golangci-lint] validates Go code in the project
 golangci-lint:

scripts/shared/entry

@@ -3,8 +3,8 @@ set -e
 
 source "${SCRIPTS_DIR}/lib/debug_functions"
 
-# shellcheck disable=SC2064 # We want the current values
-trap "chown -R $DAPPER_UID:$DAPPER_GID ." exit
+# Change ownership of files created inside the container
+trap 'find . -writable -newercc /proc -execdir chown $DAPPER_UID:$DAPPER_GID {} +' exit
 
 mkdir -p bin dist output