Add Hugo Modules

This commit implements Hugo Modules.

This is a broad subject, but some keywords include:

* A new `module` configuration section where you can import almost anything. You can configure both your own file mounts nd the file mounts of the modules you import. This is the new recommended way of configuring what you earlier put in `configDir`, `staticDir` etc. And it also allows you to mount folders in non-Hugo-projects, e.g. the `SCSS` folder in the Bootstrap GitHub project.
* A module consists of a set of mounts to the standard 7 component types in Hugo: `static`, `content`, `layouts`, `data`, `assets`, `i18n`, and `archetypes`. Yes, Theme Components can now include content, which should be very useful, especially in bigger multilingual projects.
* Modules not in your local file cache will be downloaded automatically and even "hot replaced" while the server is running.
* Hugo Modules supports and encourages semver versioned modules, and uses the minimal version selection algorithm to resolve versions.
* A new set of CLI commands are provided to manage all of this: `hugo mod init`,  `hugo mod get`,  `hugo mod graph`,  `hugo mod tidy`, and  `hugo mod vendor`.

All of the above is backed by Go Modules.

Fixes #5973
Fixes #5996
Fixes #6010
Fixes #5911
Fixes #5940
Fixes #6074
Fixes #6082
Fixes #6092

1 files changed, 34 insertions, 55 deletions

diff --git a/hugolib/disableKinds_test.go b/hugolib/disableKinds_test.go
index f5c093646..c191dfef1 100644
--- a/hugolib/disableKinds_test.go
+++ b/hugolib/disableKinds_test.go
@@ -20,11 +20,7 @@ import (
 
 	"github.com/gohugoio/hugo/resources/page"
 
-	"github.com/gohugoio/hugo/deps"
-	"github.com/spf13/afero"
-
 	"github.com/gohugoio/hugo/helpers"
-	"github.com/gohugoio/hugo/hugofs"
 	"github.com/stretchr/testify/require"
 )
 
@@ -80,8 +76,6 @@ categories:
 # Doc
 `
 
-	mf := afero.NewMemMapFs()
-
 	disabledStr := "[]"
 
 	if len(disabled) > 0 {
@@ -90,47 +84,41 @@ categories:
 	}
 
 	siteConfig := fmt.Sprintf(siteConfigTemplate, disabledStr)
-	writeToFs(t, mf, "config.toml", siteConfig)
-
-	cfg, err := LoadConfigDefault(mf)
-	require.NoError(t, err)
 
-	fs := hugofs.NewFrom(mf, cfg)
-	th := testHelper{cfg, fs, t}
+	b := newTestSitesBuilder(t).WithConfigFile("toml", siteConfig)
 
-	writeSource(t, fs, "layouts/index.html", "Home|{{ .Title }}|{{ .Content }}")
-	writeSource(t, fs, "layouts/_default/single.html", "Single|{{ .Title }}|{{ .Content }}")
-	writeSource(t, fs, "layouts/_default/list.html", "List|{{ .Title }}|{{ .Content }}")
-	writeSource(t, fs, "layouts/_default/terms.html", "Terms List|{{ .Title }}|{{ .Content }}")
-	writeSource(t, fs, "layouts/404.html", "Page Not Found")
+	b.WithTemplates(
+		"index.html", "Home|{{ .Title }}|{{ .Content }}",
+		"_default/single.html", "Single|{{ .Title }}|{{ .Content }}",
+		"_default/list.html", "List|{{ .Title }}|{{ .Content }}",
+		"_default/terms.html", "Terms List|{{ .Title }}|{{ .Content }}",
+		"layouts/404.html", "Page Not Found",
+	)
 
-	writeSource(t, fs, "content/sect/p1.md", fmt.Sprintf(pageTemplate, "P1", "- tag1"))
+	b.WithContent(
+		"sect/p1.md", fmt.Sprintf(pageTemplate, "P1", "- tag1"),
+		"categories/_index.md", newTestPage("Category Terms", "2017-01-01", 10),
+		"tags/tag1/_index.md", newTestPage("Tag1 List", "2017-01-01", 10),
+	)
 
-	writeNewContentFile(t, fs.Source, "Category Terms", "2017-01-01", "content/categories/_index.md", 10)
-	writeNewContentFile(t, fs.Source, "Tag1 List", "2017-01-01", "content/tags/tag1/_index.md", 10)
+	b.Build(BuildCfg{})
+	h := b.H
 
-	h, err := NewHugoSites(deps.DepsCfg{Fs: fs, Cfg: cfg})
-
-	require.NoError(t, err)
 	require.Len(t, h.Sites, 1)
 
-	err = h.Build(BuildCfg{})
-
-	require.NoError(t, err)
-
-	assertDisabledKinds(th, h.Sites[0], disabled...)
+	assertDisabledKinds(b, h.Sites[0], disabled...)
 
 }
 
-func assertDisabledKinds(th testHelper, s *Site, disabled ...string) {
-	assertDisabledKind(th,
+func assertDisabledKinds(b *sitesBuilder, s *Site, disabled ...string) {
+	assertDisabledKind(b,
 		func(isDisabled bool) bool {
 			if isDisabled {
 				return len(s.RegularPages()) == 0
 			}
 			return len(s.RegularPages()) > 0
 		}, disabled, page.KindPage, "public/sect/p1/index.html", "Single|P1")
-	assertDisabledKind(th,
+	assertDisabledKind(b,
 		func(isDisabled bool) bool {
 			p := s.getPage(page.KindHome)
 			if isDisabled {
@@ -138,7 +126,7 @@ func assertDisabledKinds(th testHelper, s *Site, disabled ...string) {
 			}
 			return p != nil
 		}, disabled, page.KindHome, "public/index.html", "Home")
-	assertDisabledKind(th,
+	assertDisabledKind(b,
 		func(isDisabled bool) bool {
 			p := s.getPage(page.KindSection, "sect")
 			if isDisabled {
@@ -146,7 +134,7 @@ func assertDisabledKinds(th testHelper, s *Site, disabled ...string) {
 			}
 			return p != nil
 		}, disabled, page.KindSection, "public/sect/index.html", "Sects")
-	assertDisabledKind(th,
+	assertDisabledKind(b,
 		func(isDisabled bool) bool {
 			p := s.getPage(page.KindTaxonomy, "tags", "tag1")
 
@@ -156,7 +144,7 @@ func assertDisabledKinds(th testHelper, s *Site, disabled ...string) {
 			return p != nil
 
 		}, disabled, page.KindTaxonomy, "public/tags/tag1/index.html", "Tag1")
-	assertDisabledKind(th,
+	assertDisabledKind(b,
 		func(isDisabled bool) bool {
 			p := s.getPage(page.KindTaxonomyTerm, "tags")
 			if isDisabled {
@@ -165,7 +153,7 @@ func assertDisabledKinds(th testHelper, s *Site, disabled ...string) {
 			return p != nil
 
 		}, disabled, page.KindTaxonomyTerm, "public/tags/index.html", "Tags")
-	assertDisabledKind(th,
+	assertDisabledKind(b,
 		func(isDisabled bool) bool {
 			p := s.getPage(page.KindTaxonomyTerm, "categories")
 
@@ -175,7 +163,7 @@ func assertDisabledKinds(th testHelper, s *Site, disabled ...string) {
 			return p != nil
 
 		}, disabled, page.KindTaxonomyTerm, "public/categories/index.html", "Category Terms")
-	assertDisabledKind(th,
+	assertDisabledKind(b,
 		func(isDisabled bool) bool {
 			p := s.getPage(page.KindTaxonomy, "categories", "hugo")
 			if isDisabled {
@@ -185,15 +173,15 @@ func assertDisabledKinds(th testHelper, s *Site, disabled ...string) {
 
 		}, disabled, page.KindTaxonomy, "public/categories/hugo/index.html", "Hugo")
 	// The below have no page in any collection.
-	assertDisabledKind(th, func(isDisabled bool) bool { return true }, disabled, kindRSS, "public/index.xml", "<link>")
-	assertDisabledKind(th, func(isDisabled bool) bool { return true }, disabled, kindSitemap, "public/sitemap.xml", "sitemap")
-	assertDisabledKind(th, func(isDisabled bool) bool { return true }, disabled, kindRobotsTXT, "public/robots.txt", "User-agent")
-	assertDisabledKind(th, func(isDisabled bool) bool { return true }, disabled, kind404, "public/404.html", "Page Not Found")
+	assertDisabledKind(b, func(isDisabled bool) bool { return true }, disabled, kindRSS, "public/index.xml", "<link>")
+	assertDisabledKind(b, func(isDisabled bool) bool { return true }, disabled, kindSitemap, "public/sitemap.xml", "sitemap")
+	assertDisabledKind(b, func(isDisabled bool) bool { return true }, disabled, kindRobotsTXT, "public/robots.txt", "User-agent")
+	assertDisabledKind(b, func(isDisabled bool) bool { return true }, disabled, kind404, "public/404.html", "Page Not Found")
 }
 
-func assertDisabledKind(th testHelper, kindAssert func(bool) bool, disabled []string, kind, path, matcher string) {
+func assertDisabledKind(b *sitesBuilder, kindAssert func(bool) bool, disabled []string, kind, path, matcher string) {
 	isDisabled := stringSliceContains(kind, disabled...)
-	require.True(th.T, kindAssert(isDisabled), fmt.Sprintf("%s: %t", kind, isDisabled))
+	require.True(b.T, kindAssert(isDisabled), fmt.Sprintf("%s: %t", kind, isDisabled))
 
 	if kind == kindRSS && !isDisabled {
 		// If the home page is also disabled, there is not RSS to look for.
@@ -204,20 +192,11 @@ func assertDisabledKind(th testHelper, kindAssert func(bool) bool, disabled []st
 
 	if isDisabled {
 		// Path should not exist
-		fileExists, err := helpers.Exists(path, th.Fs.Destination)
-		require.False(th.T, fileExists)
-		require.NoError(th.T, err)
+		fileExists, err := helpers.Exists(path, b.Fs.Destination)
+		require.False(b.T, fileExists)
+		require.NoError(b.T, err)
 
 	} else {
-		th.assertFileContent(path, matcher)
-	}
-}
-
-func stringSliceContains(k string, values ...string) bool {
-	for _, v := range values {
-		if k == v {
-			return true
-		}
+		b.AssertFileContent(path, matcher)
 	}
-	return false
 }