Please BUILD rules for Hugo static site generation. See https://please.build/ for initial setup. Ensure hugo is on your PATH. Then use this file (name it BUILD) in the root of your Hugo project directory to build the site and copy files.

Please BUILD Hugo

# Zipped
sh_cmd(
    name = "build_hugo_zip_and_copy",
    # srcs = [":hugo_public_zip"],
    # Must escape newly defined env vars within the script to avoid Please expanding them at build time
    cmd = [
        "DEST=/home/username/hugo_site.com",
        "mkdir -p \\\$DEST",
        "cp -r $(out_location :hugo_public_zip) \\\$DEST",
    ],
    data = [":hugo_public_zip"],
)

# Unzipped
sh_cmd(
    name = "build_hugo_and_copy",
    # Must escape newly defined env vars within the script to avoid Please expanding them at build time
    cmd = [
        "DEST=/home/username/hugo_site.com",
        "mkdir -p \\\$DEST",
        "cp -r $(out_location :hugo)/* \\\$DEST",
    ],
    data = [":hugo"],
)

genrule(
    name = "hugo_public_zip",
    srcs = [":hugo|final"], # refer to specific OUT from the :hugo rule
    outs = ["public.zip"],
    cmd = "zip -r $OUTS $SRCS",
)

# Must ensure hugo is on your path
genrule(
    name = "hugo",
    srcs = glob(
        ["config.toml", "**/*"],
        exclude = [".git*", "public"],
    ),
    outs = {
        "final": ["public"],
    },
    tools = {
        "hugo": [
            "hugo",
        ],
    },
    # NB you can call the temp dir $OUT.temp or $.temp
    # You can also join these commands with "&&"
    cmd = [
        "mkdir -p $OUT.temp $OUTS_FINAL",
        "cp -r --parents $SRCS $OUT.temp",
        "cd $OUT.temp",
        "$TOOLS_HUGO -D --source . --destination ../$OUTS_FINAL",
    ]
)