bazel run //:site failed as mkdir .jekyll-cache failed for permission issues about bazel-blog

[storypku]

Tested again on MacOS, I noticed that the site-srcs directory was mode 555 rather than 755 (site-build), which means this directory was not writable.

[bin]$ pwd
path/to/bazel-blog/bazel-out/darwin-fastbuild/bin
[bin]$ ll -lh
total 50M
drwxr-xr-x  3 story wheel   96 11 15 14:13 _sass
-r-xr-xr-x  1 story wheel  444 11 15 14:13 bootstrap-css.args
-r-xr-xr-x  1 story wheel 700K 11 15 14:13 bootstrap-css.tar
-r-xr-xr-x  1 story wheel  701 11 15 14:13 bootstrap-images.args
-r-xr-xr-x  1 story wheel 220K 11 15 14:13 bootstrap-images.tar
-r-xr-xr-x  1 story wheel  285 11 15 14:13 bootstrap-js.args
-r-xr-xr-x  1 story wheel 110K 11 15 14:13 bootstrap-js.tar
-r-xr-xr-x  1 story wheel  301 11 15 14:13 font-awesome-css.args
-r-xr-xr-x  1 story wheel  70K 11 15 14:13 font-awesome-css.tar
-r-xr-xr-x  1 story wheel  627 11 15 14:13 font-awesome-font.args
-r-xr-xr-x  1 story wheel 760K 11 15 14:13 font-awesome-font.tar
-r-xr-xr-x  1 story wheel  15K 11 15 14:13 jekyll-files.args
-r-xr-xr-x  1 story wheel  24M 11 15 14:13 jekyll-files.tar
-r-xr-xr-x  1 story wheel  463 11 15 14:13 jekyll-tree.args
-r-xr-xr-x  1 story wheel  25M 11 15 14:13 jekyll-tree.tar
-r-xr-xr-x  1 story wheel 1.2K 11 15 14:13 site
drwxr-xr-x  2 story wheel   64 11 15 14:28 site-build
dr-xr-xr-x 17 story wheel  544 11 15 14:13 site-srcs
drwxr-xr-x  4 story wheel  128 11 15 14:13 site.runfiles
-r-xr-xr-x  1 story wheel  463 11 15 14:13 site.runfiles_manifest

[storypku]

This issue is caused by Jekyll versions. Maybe Jekyll < 4 is OK while I used 4.1.1 throughout my experiment.

Modified scripts/jekyll.bzl to run jekyll build with an extra --disable-disk-cache option, and it seems OK to bazel build //:site.

However, bazel run //:site still failed complaining about redcarpet:

$ jekyll build --disable-disk-cache -q -s bazel-out/darwin-fastbuild/bin/site-srcs -d bazel-out/darwin-fastbuild/bin/site-build --trace
Markdown processor: "redcarpet" is not a valid Markdown processor.
                    Available processors are: kramdown

See jekyll/jekyll#7838 (comment)

After downgrading Jekyll to 3.9.0 and gem installed redcarpet and pygments.rb, everything seems to be OK.