PDF generation fixes (quii#503)

* Issue: Automate the gofmt in markdown files using gofmtmd during build
Issue Link: quii#353
Modifications:
* Modified the build script to download and run the gofmtmd tool on the markdown files
* Ran the script locally and fixed the issues reported by gofmtmd tool

Note: Intro to generics md file contains some syntax related to generics which is not recognised by the tool. So some valid
code fences are not marked as go

* Issue: Errors regarding epubcheck
Issue Link: quii#420
Solution:
* Corrected the SVG syntax by omitting the  version tag and dtd info
* Minorr markup corrections in md files

Test Case:
* Ran build books script locally and is able to view the generated epub file
* Added newly created epub file to Google Play books and is able to read the book

* Issue: PDF generation build fixes
Issue link: quii#205
Solution:
1. Created a custom docker image with fonts needed for CJK support and some fonts
2. Updated the build script to use the custom pandoc image
Test case:
1. Ran the build script locally and verified that the books generation is successful

* Update go.yml to add support to upload assets 

Made changes to GH actions to add generated epub and PDF to the release once published

* Corrected the yaml format

* Made changes to add cover page before the toc

.github/workflows/go.yml

@@ -5,6 +5,8 @@ on:
     branches: [ main ]
   pull_request:
     branches: [ main ]
+  release:
+    types: [ published ]
 
 jobs:
 
@@ -23,3 +25,33 @@ jobs:
 
     - name: Build books
       run: ./build.books.sh
+
+    - name: Get release
+      id: get_release
+      if: github.event_name == 'release' && github.event.action == 'published'
+      uses: bruceadams/get-release@v1.2.3
+      env:
+        GITHUB_TOKEN: ${{ github.token }}
+
+    - name: Attach generated epub upon release publish
+      if: github.event_name == 'release' && github.event.action == 'published'
+      with:
+        upload_url: ${{ steps.get_release.outputs.upload_url }}
+        asset_path: ./learn-go-with-tests.epub
+        asset_name: learn-go-with-tests.epub
+        asset_content_type: application/epub+zip
+      uses: actions/upload-release-asset@v1.0.2
+      env:
+        GITHUB_TOKEN: ${{ github.token }}
+
+    - name: Attach generated PDF upon release publish
+      if: github.event_name == 'release' && github.event.action == 'published'
+      with:
+        upload_url: ${{ steps.get_release.outputs.upload_url }}
+        asset_path: ./learn-go-with-tests.pdf
+        asset_name: learn-go-with-tests.pdf
+        asset_content_type: application/pdf
+      uses: actions/upload-release-asset@v1.0.2
+      env:
+        GITHUB_TOKEN: ${{ github.token }}       
+

anti-patterns.md

@@ -144,12 +144,12 @@ At first pass it's reasonable to say the design isn't so bad. It only has 2 depe
 
 Re-evaluate the design by considering the handler's responsibilities:
 
-- Parse the request body into a `User` ✅
-- Use `UserStore` to check if the user exists ❓
-- Use `UserStore` to store the user ❓
-- Compose an email ❓
-- Use `Emailer` to send the email ❓
-- Return an appropriate http response, depending on success, errors, etc ✅
+- Parse the request body into a `User` :white_check_mark:
+- Use `UserStore` to check if the user exists :question:
+- Use `UserStore` to store the user :question:
+- Compose an email :question:
+- Use `Emailer` to send the email :question:
+- Return an appropriate http response, depending on success, errors, etc :white_check_mark:
 
 To exercise this code, you're going to have to write many tests with varying degrees of test double setups, spies, etc
 

build.books.sh

@@ -2,35 +2,43 @@
 
 set -e
 
-#docker run -v `pwd`:/source jagregory/pandoc -o learn-go-with-tests.pdf -H meta.tex --latex-engine=xelatex --variable urlcolor=blue --toc --toc-depth=1 pdf-cover.md \
-#    gb-readme.md \
-#    why.md \
-#    hello-world.md \
-#    integers.md \
-#    arrays-and-slices.md \
-#    structs-methods-and-interfaces.md \
-#    pointers-and-errors.md \
-#    maps.md \
-#    dependency-injection.md \
-#    mocking.md \
-#    concurrency.md \
-#    select.md \
-#    reflection.md \
-#    sync.md \
-#    context.md \
-#    roman-numerals.md \
-#    math.md \
-#    app-intro.md \
-#    http-server.md \
-#    json.md \
-#    io.md \
-#    command-line.md \
-#    time.md \
-#    websockets.md \
-#    os-exec.md \
-#    error-types.md \
+docker run --rm -v `pwd`:/data uppalabharath/pandoc-latex-cjk:latest --from=gfm+rebase_relative_paths -o learn-go-with-tests.pdf \
+    -H meta.tex --pdf-engine=xelatex --variable urlcolor=blue --toc --toc-depth=1 \
+    -B pdf-cover.tex \
+    gb-readme.md \
+    why.md \
+    hello-world.md \
+    integers.md \
+    iteration.md \
+    arrays-and-slices.md \
+    structs-methods-and-interfaces.md \
+    pointers-and-errors.md \
+    maps.md \
+    dependency-injection.md \
+    mocking.md \
+    concurrency.md \
+    select.md \
+    reflection.md \
+    sync.md \
+    context.md \
+    roman-numerals.md \
+    math.md \
+    reading-files.md \
+    intro-to-generics.md \
+    app-intro.md \
+    http-server.md \
+    json.md \
+    io.md \
+    command-line.md \
+    time.md \
+    websockets.md \
+    os-exec.md \
+    error-types.md \
+    context-aware-reader.md \
+    http-handlers-revisited.md \
+    anti-patterns.md
 
-docker run --rm -v `pwd`:/data pandoc/latex --from=gfm --to=epub --file-scope title.txt -o learn-go-with-tests.epub --pdf-engine=xelatex --toc --toc-depth=1  \
+docker run --rm -v `pwd`:/data uppalabharath/pandoc-latex-cjk:latest --from=gfm+rebase_relative_paths --to=epub --file-scope title.txt -o learn-go-with-tests.epub --pdf-engine=xelatex --toc --toc-depth=1  \
     gb-readme.md \
     why.md \
     hello-world.md \

command-line.md

@@ -46,17 +46,17 @@ If you have `tree` installed you should run it and your structure should look li
 
 ```
 .
-├── file_system_store.go
-├── file_system_store_test.go
-├── cmd
-│   └── webserver
-│       └── main.go
-├── league.go
-├── server.go
-├── server_integration_test.go
-├── server_test.go
-├── tape.go
-└── tape_test.go
+|-- file_system_store.go
+|-- file_system_store_test.go
+|-- cmd
+|   |-- webserver
+|       |-- main.go
+|-- league.go
+|-- server.go
+|-- server_integration_test.go
+|-- server_test.go
+|-- tape.go
+|-- tape_test.go
 ```
 
 We now effectively have a separation between our application and the library code but we now need to change some package names. Remember when you build a Go application its package _must_ be `main`.

math.md

@@ -840,11 +840,11 @@ directory, called (confusingly), `clockface`. In there we'll put the `main`
 package that will create the binary that will build an SVG:
 
 ```
-├── clockface
-│   └── main.go
-├── clockface.go
-├── clockface_acceptance_test.go
-└── clockface_test.go
+|-- clockface
+|       |-- main.go
+|-- clockface.go
+|-- clockface_acceptance_test.go
+|-- clockface_test.go
 ```
 
 Inside `main.go`, you'll start with this code but change the import for the

meta.tex

@@ -1,5 +1,14 @@
 \usepackage{fancyhdr}
 
+\usepackage{xeCJK}
+\usepackage{fontspec}% set Chinese fonts, as follows
+\setmainfont{DejaVu Sans}
+\setmonofont{DejaVu Sans}
+\setsansfont{DejaVu Sans}
+\setCJKmainfont[BoldFont=Noto Sans CJK TC,ItalicFont=Noto Sans CJK TC]{Noto Sans CJK TC}
+\setCJKsansfont[BoldFont=Noto Sans CJK TC]{Noto Sans CJK TC}
+\setCJKmonofont{Noto Sans Mono CJK TC}
+
 \pagestyle{fancy}
 \fancyhf{}
 \cfoot{v 10.0.0}

pdf-cover.tex

@@ -0,0 +1,2 @@
+\includegraphics{epub-cover.png}
+\thispagestyle{empty}