load some test data when starting the dev shell

srv/default.nix

@@ -2,6 +2,7 @@
   bash,
   go,
   buildGoModule,
+  sqlite,
   writeScript,
   writeText,
   stdenv,
@@ -51,13 +52,12 @@
 
     shell = stdenv.mkDerivation {
         name = "mediocre-blog-srv-shell";
-        buildInputs = [ go ];
-        shellHook = ''source ${init}'';
-    };
+        buildInputs = [ go sqlite ];
+        shellHook = ''
+          source ${init}
 
-    shellWithBuild = stdenv.mkDerivation {
-        name = "mediocre-blog-srv-shell-with-build";
-        buildInputs = [ go build ];
-        shellHook = ''source ${init}'';
+          echo "Loading test data..."
+          (cd srv/src/cmd/load-test-data && go run main.go)
+        '';
     };
 }

srv/src/cmd/load-test-data/main.go

@@ -0,0 +1,129 @@
+package main
+
+import (
+	"context"
+	"fmt"
+	"os"
+	"path/filepath"
+	"time"
+
+	cfgpkg "github.com/mediocregopher/blog.mediocregopher.com/srv/cfg"
+	"github.com/mediocregopher/blog.mediocregopher.com/srv/post"
+	"github.com/mediocregopher/mediocre-go-lib/v2/mctx"
+	"github.com/mediocregopher/mediocre-go-lib/v2/mlog"
+	"gopkg.in/yaml.v3"
+)
+
+type testData struct {
+	PublishedPosts []post.Post `yaml:"published_posts"`
+	Assets         map[string]string
+}
+
+func loadTestData(path string) (testData, error) {
+
+	f, err := os.Open(path)
+	if err != nil {
+		return testData{}, fmt.Errorf("opening file: %w", err)
+	}
+	defer f.Close()
+
+	var res testData
+
+	if err := yaml.NewDecoder(f).Decode(&res); err != nil {
+		return testData{}, fmt.Errorf("decoding file contents: %w", err)
+	}
+
+	return res, nil
+}
+
+func main() {
+
+	ctx := context.Background()
+
+	cfg := cfgpkg.NewBlogCfg(cfgpkg.Params{})
+
+	var dataDir cfgpkg.DataDir
+	dataDir.SetupCfg(cfg)
+	defer dataDir.Close()
+	ctx = mctx.WithAnnotator(ctx, &dataDir)
+
+	testDataPath := cfg.String("test-data-path", "./test-data.yml", "File containing the data to be loaded in")
+
+	// initialization
+	err := cfg.Init(ctx)
+
+	logger := mlog.NewLogger(nil)
+	defer logger.Close()
+
+	logger.Info(ctx, "process started")
+	defer logger.Info(ctx, "process exiting")
+
+	if err != nil {
+		logger.Fatal(ctx, "initializing", err)
+	}
+
+	testDataDir := filepath.Dir(*testDataPath)
+
+	testData, err := loadTestData(*testDataPath)
+	if err != nil {
+		logger.Fatal(ctx, "loading test data", err)
+	}
+
+	postDB, err := post.NewSQLDB(dataDir)
+	if err != nil {
+		logger.Fatal(ctx, "initializing post sql db", err)
+	}
+	defer postDB.Close()
+
+	{
+
+		postStore := post.NewStore(postDB)
+
+		now := time.Now().Truncate(time.Hour)
+
+		for _, post := range testData.PublishedPosts {
+
+			ctx := mctx.Annotate(ctx,
+				"postID", post.ID,
+				"now", now)
+
+			if _, err := postStore.Set(post, now); err != nil {
+				logger.Fatal(ctx, "setting post", err)
+			}
+
+			logger.Info(ctx, "set post")
+
+			now = now.Add(1 * time.Hour)
+		}
+
+	}
+
+	{
+		assetStore := post.NewAssetStore(postDB)
+
+		setAsset := func(assetID, assetPath string) error {
+			assetFullPath := filepath.Join(testDataDir, assetPath)
+
+			f, err := os.Open(assetFullPath)
+			if err != nil {
+				return fmt.Errorf("opening %q for reading: %w", assetFullPath, err)
+			}
+			defer f.Close()
+
+			return assetStore.Set(assetID, f)
+		}
+
+		for assetID, assetPath := range testData.Assets {
+
+			ctx := mctx.Annotate(ctx,
+				"assetID", assetID,
+				"assetPath", assetPath)
+
+			if err := setAsset(assetID, assetPath); err != nil {
+				logger.Fatal(ctx, "setting asset", err)
+			}
+
+			logger.Info(ctx, "set asset")
+		}
+	}
+}

srv/src/cmd/load-test-data/test-data.yml

@@ -0,0 +1,85 @@
+---
+
+published_posts:
+
+  - id: markdown-test
+    title: Markdown Test
+    description: A little post containing different kinds of markdown elements.
+    tags:
+      - foo
+    series: testing
+    body: |
+
+      This here's a test post containing various markdown elements in its body.
+      It's useful for making sure that posts will look good (generally).
+
+      ## Let's Begin
+
+      There's various things worth testing. _Emphasized_ and **bold** text are
+      great starting points. Also `little bits of code`.
+
+      One might consider making a list of them.
+
+      * A bit normal.
+      * _A bit emphasized_
+      * **A bit bold**
+      * `A bit of code.`
+
+      So many!
+
+      ### A Subsection
+
+      Crazy. Another way to delineate a subsection is with a horizontal rule.
+
+      -----
+
+      And it only gets crazier from here!
+
+      Check out this code block.
+
+      ```
+      // It's like actually being in the matrix
+      for !dead {
+        if awake {
+          work()
+        } else {
+          continue
+        }
+      }
+      ```
+
+      Edgy.
+
+      #### Side-note
+
+      Did you know that the terms "cyberspace" and "matrix" are attributable to a book from 1984 called _Neuromancer_?
+
+      > The 1999 cyberpunk science fiction film The Matrix particularly draws from Neuromancer both eponym and usage of the term "matrix".
+      > - Wikipedia
+
+      Here's a real picture of cyberspace.
+
+      ![not a sound stage]({{ AssetURL "galaxy.jpg" }})
+
+      This has been a great post.
+
+  - id: empty-test
+    title: Empty Test
+    description: A post with no content. Might as well test it.
+    tags:
+      - foo
+      - bar
+    series: testing
+    body: ""
+
+  - id: little-markdown-test
+    title: Little Markdown Test
+    description: A post with almost no content.
+    tags:
+      - bar
+    series: testing
+    body: |
+      This page is almost empty.
+
+assets:
+  galaxy.jpg: ./galaxy.jpg

srv/src/go.mod

@@ -22,4 +22,5 @@ require (
 	golang.org/x/image v0.0.0-20220413100746-70e8d0d3baa9
 	golang.org/x/sys v0.0.0-20211216021012-1d35b9e2eb4e // indirect
 	golang.org/x/term v0.0.0-20210927222741-03fcf44c2211 // indirect
+	gopkg.in/yaml.v3 v3.0.1 // indirect
 )

srv/src/go.sum

@@ -256,4 +256,6 @@ gopkg.in/yaml.v2 v2.4.0 h1:D8xgwECY7CYvx+Y2n4sBz93Jn9JRvxdiyyo8CTfuKaY=
 gopkg.in/yaml.v2 v2.4.0/go.mod h1:RDklbk79AGWmwhnvt/jBztapEOGDOx6ZbXqjP6csGnQ=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c h1:dUUwHk2QECo/6vqA44rthZ8ie2QXMNeKRTHCNY2nXvo=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
+gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=
+gopkg.in/yaml.v3 v3.0.1/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 honnef.co/go/tools v0.0.0-20190102054323-c2f93a96b099/go.mod h1:rf3lG4BRIbNafJWhAfAdb/ePZxsR/4RtNHQocxwk9r4=