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110 lines
2.1 KiB
Nix
110 lines
2.1 KiB
Nix
{
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live-server,
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parallel,
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watchexec,
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writeShellApplication,
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# arguments to `nix-build`, e.g. `"foo.nix -A bar"`
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buildArgs ? "",
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# what path to open a browser at
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open ? "/index.html",
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}:
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let
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error-page = writeShellApplication {
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name = "error-page";
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text = ''
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rm -rf "''${serve:?}"
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mkdir -p "$(dirname "''${error_page_absolute:?}")"
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cat > "''${error_page_absolute:?}" << EOF
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<!DOCTYPE html>
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<html>
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<head>
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<style>
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@media (prefers-color-scheme: dark) {
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:root { filter: invert(100%); }
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}
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</style>
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</head>
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<body/><pre/>building...
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EOF
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'';
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};
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build-and-link = writeShellApplication {
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name = "build-and-link";
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runtimeInputs = [ error-page ];
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text = ''
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error-page
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set +e
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2>&1 nix-build --out-link "''${staging:?}" ${buildArgs} \
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| tee -a "''${error_page_absolute:?}"
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exit_status=$?
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set -e
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if [ $exit_status -eq 0 ]; then
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rm -rf "''${serve:?}"
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mv "''${staging:?}" "''${serve:?}"
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fi
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'';
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};
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# https://watchexec.github.io/
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watcher = writeShellApplication {
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name = "watcher";
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runtimeInputs = [
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watchexec
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build-and-link
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];
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text = ''
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watchexec \
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--shell=none \
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--restart \
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build-and-link
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'';
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};
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# https://crates.io/crates/live-server
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server = writeShellApplication {
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name = "server";
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runtimeInputs = [ live-server ];
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text = ''
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live-server \
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--host=127.0.0.1 \
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--open=${open} \
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"''${serve:?}"
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'';
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};
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in
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writeShellApplication {
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name = "devmode";
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runtimeInputs = [
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parallel
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watcher
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server
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error-page
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];
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text = ''
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function handle_exit {
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rm -rf "$tmpdir"
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}
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tmpdir="$(mktemp -d)"
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trap handle_exit EXIT
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export serve="$tmpdir/serve"
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export staging="$tmpdir/staging"
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export error_page_absolute="$serve/${open}"
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error-page
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parallel \
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--will-cite \
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--line-buffer \
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--tagstr '{/}' \
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::: \
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watcher \
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server
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'';
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}
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