Added support for modifying links in image URLs. Fixed linking when adding extra files from outside.

main.go

@@ -133,7 +133,6 @@ This directive runs executable with arguments and put its stderr and stdout outp
 		if !*disableGenCodeBlocksDirectives {
 			opts = append(opts, mdformatter.WithCodeBlockTransformer(mdgen.NewCodeBlockTransformer()))
 		}
-
 		if len(*files) == 0 {
 			return errors.New("no files to format")
 		}

pkg/mdformatter/testdata/formatted.md

@@ -51,6 +51,8 @@ See those components on this diagram:
 
 <img src="img/arch.jpg" class="img-fluid" alt="architecture overview" />
 
+![img](img/arch.jpg)
+
 ### [Sidecar](components/sidecar.md)
 
 Thanos integrates with existing Prometheus servers through a [Sidecar process](https://docs.microsoft.com/en-us/azure/architecture/patterns/sidecar#solution), which runs on the same machine or in the same pod as the Prometheus server.

pkg/mdformatter/testdata/formatted_and_transformed.md

@@ -51,6 +51,8 @@ See those components on this diagram:
 
 <img src="img/arch.jpg" class="img-fluid" alt="architecture overview" />
 
+![img]($$-img/arch.jpg-testdata/not_formatted.md-$$)
+
 ### [Sidecar]($$-components/sidecar.md-testdata/not_formatted.md-$$)
 
 Thanos integrates with existing Prometheus servers through a [Sidecar process]($$-https://docs.microsoft.com/en-us/azure/architecture/patterns/sidecar#solution-testdata/not_formatted.md-$$), which runs on the same machine or in the same pod as the Prometheus server.

pkg/mdformatter/testdata/not_formatted.md

@@ -53,6 +53,8 @@ See those components on this diagram:
 
 <img src="img/arch.jpg" class="img-fluid" alt="architecture overview" />
 
+![img](img/arch.jpg)
+
 ### [Sidecar](components/sidecar.md)
 
 Thanos integrates with existing Prometheus servers through a [Sidecar process](https://docs.microsoft.com/en-us/azure/architecture/patterns/sidecar#solution), which runs on the same machine or in the same pod as the Prometheus server.

pkg/mdformatter/testdata/not_formatted.md.diff

@@ -37,7 +37,7 @@
 
  Thanos bases itself on vanilla [Prometheus](https://prometheus.io/) (v2.2.1+). We plan to support *all* Prometheus version beyond this version.
 
-@@ -77,4 +75,4 @@
+@@ -79,4 +77,4 @@
 
  If you are not interested in backing up any data, the `--objstore.config-file` flag can simply be omitted.
 
@@ -55,7 +55,7 @@
 
  Let's extend the Sidecar in the previous section to connect to a Prometheus server, and expose the Store API.
 
-@@ -96,4 +94,2 @@
+@@ -98,4 +96,2 @@
      --grpc-address              0.0.0.0:19090              # GRPC endpoint for StoreAPI
  ```
 
@@ -71,7 +71,7 @@
 
  #### External Labels
 
-@@ -168,5 +164,3 @@
+@@ -170,5 +166,3 @@
 
  Go to the configured HTTP address, and you should now be able to query across all Prometheus instances and receive de-duplicated data.
 
@@ -90,7 +90,7 @@
 
  ```bash
  thanos query \
-@@ -189,4 +183,2 @@
+@@ -191,4 +185,2 @@
 
  Read more details [here](service-discovery.md).
 
@@ -106,7 +106,7 @@
 
  ```bash
  thanos store \
-@@ -207,1 +199,1 @@
+@@ -209,1 +201,1 @@
 
  The store gateway occupies small amounts of disk space for caching basic information about data in the object storage. This will rarely exceed more than a few gigabytes and is used to improve restart times. It is useful but not required to preserve it across restarts.
 
@@ -115,7 +115,7 @@
 
  ### [Compactor](components/compact.md)
 
-@@ -224,8 +216,4 @@
+@@ -226,8 +218,4 @@
 
  The compactor is not in the critical path of querying or data backup. It can either be run as a periodic batch job or be left running to always compact data as soon as possible. It is recommended to provide 100-300GB of local disk space for data processing.
 
@@ -140,15 +140,15 @@
  ```$
  usage: thanos rule [<flags>]
 
-@@ -412,1 +400,0 @@
+@@ -414,1 +402,0 @@
 
  The configuration format is the following:
 
 -[embedmd]:# (../flags/config_rule_alerting.txt yaml)
  ```yaml
  alertmanagers:
  - http_config:
-@@ -438,1 +425,4 @@
+@@ -440,1 +427,4 @@
    timeout: 10s
    api_version: v1
  ```

pkg/mdformatter/transformer.go

@@ -40,6 +40,7 @@ func (t *transformer) Render(w io.Writer, source []byte, node ast.Node) error {
 	if err := ast.Walk(node, func(n ast.Node, entering bool) (ast.WalkStatus, error) {
 		var err error
 		switch typedNode := n.(type) {
+		// TODO(bwplotka): Add support for links inside HTML.
 		case *ast.Link:
 			if !entering || t.link == nil {
 				return ast.WalkSkipChildren, nil
@@ -62,6 +63,14 @@ func (t *transformer) Render(w io.Writer, source []byte, node ast.Node) error {
 			repl := ast.NewString(dest)
 			repl.SetParent(n)
 			n.Parent().ReplaceChild(n.Parent(), n, repl)
+		case *ast.Image:
+			if !entering || t.link == nil {
+				return ast.WalkSkipChildren, nil
+			}
+			typedNode.Destination, err = t.link.TransformDestination(t.sourceCtx, typedNode.Destination)
+			if err != nil {
+				return ast.WalkStop, err
+			}
 		case *ast.FencedCodeBlock:
 			if !entering || t.cb == nil || typedNode.Info == nil {
 				return ast.WalkSkipChildren, nil

pkg/transform/config.go

@@ -31,12 +31,12 @@ const (
 type Config struct {
 	Version int
 
-	// InputDir is a relative path that assumes input directory for markdown files and assets.
+	// InputDir is a relative (to PWD) path that assumes input directory for markdown files and assets.
 	InputDir string `yaml:"inputDir"`
-	// OutputDir is a relative output directory that we expect all files to land in. Typically that can be `content` dir
+	// OutputDir is a relative (to PWD) output directory that we expect all files to land in. Typically that can be `content` dir
 	// which hugo uses as an input.
 	OutputDir string `yaml:"outputDir"`
-	// OutputStaticDir is relative output directory for all non markdown files.
+	// OutputStaticDir is relative (to PWD) output directory for all non markdown files.
 	OutputStaticDir string `yaml:"outputStaticDir"`
 
 	// ExtraInputGlobs allows to bring files from outside of input dir.
@@ -57,11 +57,18 @@ type TransformationConfig struct {
 	_glob glob.Glob
 
 	// Glob matches files using https://github.com/gobwas/glob.
+	// Glob is matched against the relative path of the file in the input directory in
+	// relation to the input directory. For example:
+	// InputDir: dir1, File found in dir1/a/b/c/file.md, the given glob will be matched
+	// against a/b/c/file.md.
 	// After first match, file is no longer matching other elements.
 	Glob string
 
 	// Path is an optional different path for the file to be moved.
-	// NOTE: All relative links will be moved accordingly.
+	// If not specified, file will be moved to the exact same position as in input directory.
+	// Use absolute path to point the absolute structure where `/` means output directory.
+	// If relative path is used, it will start in the directory the file is in the input directory.
+	// NOTE: All relative links will be moved accordingly inside such file.
 	Path string
 
 	// FrontMatter holds front matter transformations.

pkg/transform/testdata/mdox1.yaml

@@ -7,7 +7,7 @@ outputStaticDir: "testdata/tmp/1static"
 gitIgnored: true
 
 transformations:
-  - glob: "/README.md"
+  - glob: "README.md"
     path: _index.md
     frontMatter:
       template: |

pkg/transform/testdata/mdox2.yaml

@@ -3,14 +3,14 @@ version: 1
 inputDir: "testdata/testproj"
 outputDir: "testdata/tmp/2"
 extraInputGlobs:
-  - "../../README.md"
+  - "testdata/test.md"
 
 gitIgnored: true
 localLinksStyle: hugo
 
 transformations:
-  - glob: "/../../../../README.md"
-    path: _index.md
+  - glob: "../test.md"
+    path: /_index.md
     frontMatter:
       template: |
         title: "{{ .Origin.FirstHeader }}"
@@ -20,13 +20,13 @@ transformations:
           _target:
             path: "/**"
 
-  - glob: "/doc.md"
+  - glob: "doc.md"
     frontMatter:
       template: |
         title: "{{ .Origin.FirstHeader }}"
         slug: "{{ .Target.FileName }}"
 
-  - glob: "/Team/doc.md"
+  - glob: "Team/doc.md"
     path: inner/doc.md
     frontMatter:
       template: |

pkg/transform/testdata/test.md

@@ -0,0 +1,11 @@
+# Test
+
+Yolo
+
+[RelLink](testproj/Proposals/README.md)
+
+[RelLink](testproj/Team/doc.md)
+
+![Image](testproj/logo.png)
+
+![Image](testproj/images/logo2.png)

pkg/transform/testdata/testproj/Proposals/README.md

@@ -2,4 +2,6 @@
 
 [RelLink](../README.md)
 
-[RelLink](../Team/doc.md)
+[RelLink](../Team/doc.md)
+
+This should not work: [RelLink](../../test.md)

pkg/transform/testdata/testproj/README2.md → pkg/transform/testdata/testproj/README.md

@@ -6,4 +6,6 @@ Yolo
 
 [RelLink](Team/doc.md)
 
-![Image](logo.png)
+![Image](logo.png)
+
+![Image](images/logo2.png)