Add "dry run" options for push-to-ghost command

These options make Seance go through the motions of processing a
post without actually uploading images and/or pushing them to
Ghost. This makes it easier to test out stuff for new features
(or, more accurately, it reduces the need to clean up afterwards!)

cli.js

@@ -140,8 +140,15 @@ program.command('fetch-medium <post_url>')
 program.command('push-ghost <file>')
   .alias('push')
   .description('push a downloaded Medium post to Ghost')
-  .action((file) => {
-    seance.pushToGhost(file)
+  .option('-d, --dry-run', "full dry run: doesn't upload anything (same as --no-upload --no-push)")
+  .option('--no-upload', "partial dry run: don't upload images")
+  .option('--no-push', "partial dry run: don't push to ghost")
+  .action((file, o) => {
+    seance.pushToGhost(file, {
+      dryRun: o.dryRun,
+      noUpload: !o.upload,
+      noPush: !o.push,
+    })
   });
 
 program.command('medium-to-ghost <mediumUrl>')

seance.js

@@ -110,15 +110,28 @@ class Seance {
 
   /**
    * function [pushToGhost]
+   * @description
+   * Pre-processes and uploads the given article to Ghost
+   *
+   * @param {Boolean} options.noUpload Skip uploading of images
+   * @param {Boolean} options.noPush Skip pushing to Ghost; just generate the file
+   * @param {Boolean} options.dryRun Combination of noUpload and noPush
    * @returns [string] status
   */
-  async pushToGhost (postSlug) {
+  async pushToGhost (postSlug, options={}) {
     this.emit('update', {
       status: 'starting',
       message: 'Starting upload: ' + postSlug,
       loglevel: 'info'
     })
 
+    if (!!options.dryRun) {
+      options.noUpload = true
+      options.noPush = true
+    }
+
+    console.log('noUpload', options.noUpload)
+
     // Decide working path
     var postFolder = path.resolve('content/' + postSlug)
 
@@ -256,7 +269,9 @@ class Seance {
             uploadedImages.push(imageName)
 
             // Let's wait for the upload, just to avoid conflicts
-            await this.uploadDav(davPath, imagePath)
+            if (!options.noUpload) {
+              await this.uploadDav(davPath, imagePath)
+            }
 
             newLine = '![' + imageAlt + '](' + uploadedPath + '/' + imageName + ')'
           }
@@ -304,7 +319,10 @@ class Seance {
             loglevel: 'info'
           })
 
-          this.uploadDav(davPath, imagePath)
+          if (!options.noUpload) {
+            this.uploadDav(davPath, imagePath)
+          }
+
           featuredImagePath = uploadedPath + '/' + imageName
         }
       }
@@ -325,42 +343,54 @@ class Seance {
       loglevel: 'info'
     })
 
-    let res = await this.ghostAdmin.posts.add({
-      title: postMeta.title,
-      custom_excerpt: postMeta.subtitle || null,
-      tags: postMeta.tags,
-      authors: users,
-      html: markdown.toHTML(await fs.promises.readFile(postOutput, 'utf-8')),
-      feature_image: featuredImagePath
-    }, {source: 'html'})
-    
-    // Check if user was added
-    if (res.primary_author.id == 1) {
-      this.emit('notification', {
-        message: `WARNING: The admin editor, "${res.primary_author.name}", is set as author for this post. If this is incorrect, there was some problem matching usernames. Please check and set it manually.`,
+    if (!options.noPush) {
+      let res = await this.ghostAdmin.posts.add({
+        title: postMeta.title,
+        custom_excerpt: postMeta.subtitle || null,
+        tags: postMeta.tags,
+        authors: users,
+        html: markdown.toHTML(await fs.promises.readFile(postOutput, 'utf-8')),
+        feature_image: featuredImagePath
+      }, {source: 'html'})
+
+      // Check if user was added
+      if (res.primary_author.id == 1) {
+        this.emit('notification', {
+          message: `WARNING: The admin editor, "${res.primary_author.name}", is set as author for this post. If this is incorrect, there was some problem matching usernames. Please check and set it manually.`,
+        })
+      }
+
+      this.emit('update', {
+        status: 'progress',
+        progress: 100, // we don't know the percentage
+        message: 'Post conveyed successfully',
+        loglevel: 'info'
       })
+
+      return {
+        slug: res.slug,
+        id: res.id,
+        uuid: res.uuid,
+        preview_url: res.url,
+        primary_author: res.primary_author,
+        title: res.title,
+        subtitle: res.custom_excerpt,
+        status: res.status,
+      }
+    } else {
+      // just return without pushing to Ghost
+      return {
+        slug: postSlug,
+        id: 0,
+        uuid: 0,
+        preview_url: null,
+        primary_author: {},
+        title: postMeta.title,
+        subtitle: postMeta.subtitle,
+        status: 'none',
+      }
     }
-
-    this.emit('update', {
-      status: 'progress',
-      progress: 100, // we don't know the percentage
-      message: 'Post conveyed successfully',
-      loglevel: 'info'
-    })
-
-    console.log(res)
-
-    return {
-      slug: res.slug,
-      id: res.id,
-      uuid: res.uuid,
-      preview_url: res.url,
-      primary_author: res.primary_author,
-      title: res.title,
-      subtitle: res.custom_excerpt,
-      status: res.status,
-    }
-  };
+  }
 
 
   /**