hugolib: Deprecate _build front matter key in favor of build

We effectively aliased "_build" to "build" in v0.123.0, and
removed "_build" from the documentation at the same time.

diff --git a/hugolib/page__meta.go b/hugolib/page__meta.go
index 20ce1aa597bc063b94890b8460aeac5e083bfd22..56bc1d96fbf98b4b19eacfab912ad7cbed012b33 100644 (file)
--- a/hugolib/page__meta.go
+++ b/hugolib/page__meta.go
@@ -430,6 +430,7 @@ func (p *pageState) setMetaPostParams() error {
        var buildConfig any
        var isNewBuildKeyword bool
        if v, ok := pm.pageConfig.Params["_build"]; ok {
+               hugo.Deprecate("The \"_build\" front matter key", "Use \"build\" instead. See https://gohugo.io/content-management/build-options.", "0.145.0")
                buildConfig = v
        } else {
                buildConfig = pm.pageConfig.Params["build"]