kgabryje commented on a change in pull request #11796:
URL: https://github.com/apache/beam/pull/11796#discussion_r431327731
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File path: website/www/site/layouts/shortcodes/code_sample.html
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@@ -0,0 +1,15 @@
+{{/*
+ Licensed under the Apache License, Version 2.0 (the "License");
+ you may not use this file except in compliance with the License.
+ You may obtain a copy of the License at
+ http://www.apache.org/licenses/LICENSE-2.0
+ Unless required by applicable law or agreed to in writing, software
+ distributed under the License is distributed on an "AS IS" BASIS,
+ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ See the License for the specific language governing permissions and
+ limitations under the License. See accompanying LICENSE file.
+*/}}
+{{/*
+ This shortcode is used to fetch a piece of code with tags from Beam code.
+ There should be no breaklines here to make sure the string results do not
get impacts of newlines.
+*/}}{{ $tag := .Get 1 }}{{ $path := printf "code_samples/%s" (replaceRE "/"
"_" (.Get 0)) }}{{ $data := readFile $path }}{{ $matchRegex := printf
"%s%s%s%s%s" "\\[START " $tag "]\n[\\s\\S]*?\n.*\\[END " $tag "]" }}{{ $match
:= index (findRE $matchRegex $data) 0 }}{{ $lines := split $match "\n" }}{{
$lineCount := len $lines }}{{ $cleanedLines := $lines | first (sub $lineCount
1) | last (sub $lineCount 2) }}{{ $firstLine := index $cleanedLines 0 }}{{
$numberOfWhitespaces := index (findRE "^\\s*" $firstLine) 0 | len }}{{
$unindentRegex := printf "%s%d%s" "^\\s{" $numberOfWhitespaces "}" }}{{
$unindentedLines := apply $cleanedLines "replaceRE" $unindentRegex "" "." }}{{
$result := delimit $unindentedLines "\n" }}{{ print $result }}
Review comment:
In `setupDockerContainer` stage of build process, we run
`build_code_samples.sh` script, which copies Beam project files from which we
take code snippets to `website/www/site/code_samples` directory. We do that
because Hugo can't access files which are outside of its project tree (Hugo's
root is the directory that contains config.toml). When copying, we name this
files according to convention `path_to_file_filename.extension` in order to
avoid name conflicts.
`.Get 0` references an argument passed to `code_sample` shortcode which is a
path to file with code snippet. So if you pass `path/to/file/filename.py` to
code_sample, $path variable will have value
`code_samples/path_to_file_filename.py` which Hugo can access.
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