From ec34eb4919f01879b180418df5b0364bf47456b2 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Daniel=20Mart=C3=AD?= <mvdan@mvdan.cc>
Date: Tue, 5 May 2020 23:28:28 +0100
Subject: [PATCH] cmd: add a go.local.mod for development
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

It's essentially a copy of go.mod, but with the gioui.org module replaed
with the parent directory. Useful when wanting to try a change in the
root module as part of a gogio invocation or end-to-end test, such as
either of the following:

	$ cd cmd; go test -modfile=go.local.mod ./...
	$ cd cmd/gogio; go build -modfile=../go.local.mod

Since go.sum can essentially be shared, and since it seems to work with
the go tool, use a symlink. The way the -modfile flag works, if given
foo.mod, it will use the sum file at foo.sum. The only caveat is that
'go mod tidy -modfile=go.mod.local' will try to remove gioui.org lines,
since that module is replaced. So tidy shouldn't be used with -modfile.

In the future, the only upkeep needed for go.local.mod is to update the
external dependencies to mirror changes in go.mod. This is not automated
nor checked by CI, but it could be in the future if it becomes
repetitive or error-prone.

Signed-off-by: Daniel Martí <mvdan@mvdan.cc>
---
 .builds/linux.yml |  1 +
 cmd/go.local.mod  | 14 ++++++++++++++
 cmd/go.local.sum  |  1 +
 3 files changed, 16 insertions(+)
 create mode 100644 cmd/go.local.mod
 create mode 120000 cmd/go.local.sum

diff --git a/.builds/linux.yml b/.builds/linux.yml
index d2257e90..6161bb71 100644
--- a/.builds/linux.yml
+++ b/.builds/linux.yml
@@ -46,6 +46,7 @@ tasks:
      cd gio/cmd
      go test ./...
      go test -race ./...
+     go test -modfile=go.local.mod ./...
  - test_example: |
      cd gio/example
      go test -race ./...
diff --git a/cmd/go.local.mod b/cmd/go.local.mod
new file mode 100644
index 00000000..774b55b4
--- /dev/null
+++ b/cmd/go.local.mod
@@ -0,0 +1,14 @@
+module gioui.org/cmd
+
+go 1.13
+
+require (
+	gioui.org v0.0.0-00010101000000-000000000000
+	github.com/chromedp/cdproto v0.0.0-20191114225735-6626966fbae4
+	github.com/chromedp/chromedp v0.5.2
+	golang.org/x/image v0.0.0-20190802002840-cff245a6509b
+	golang.org/x/sync v0.0.0-20190423024810-112230192c58
+	golang.org/x/tools v0.0.0-20190927191325-030b2cf1153e
+)
+
+replace gioui.org => ../
diff --git a/cmd/go.local.sum b/cmd/go.local.sum
new file mode 120000
index 00000000..c14a2974
--- /dev/null
+++ b/cmd/go.local.sum
@@ -0,0 +1 @@
+go.sum
\ No newline at end of file