104 lines
2.6 KiB
Text
104 lines
2.6 KiB
Text
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#!/bin/bash
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source common.sh
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set -eu
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set -o pipefail
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function usage() {
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echo "tvlc new [-n|--name CLIENTNAME] [derivation...]"
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echo ""
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cat <<EOF
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The 'new' command creates a new git sparse checkout with the given name, and
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contents needed to build the Nix derivation(s) specified on the command line.
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Options:
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-n/--name client-name: Sets the git branch and nice checkout name for the
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workspace. If the option is not provided, the name will be based on the
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first non-option command-line argument.
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--branch branch-name: Sets the git branch name only.
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EOF
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}
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checkout_name=
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branch_name=
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options=$(getopt -o 'n:' --long debug --long name: -- "$@")
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eval set -- "$options"
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while true; do
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case "$1" in
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-h)
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usage
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exit 0
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;;
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-v)
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version
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exit 0
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;;
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-n|--name)
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shift
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checkout_name="$1"
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if [ -z "$branch_name" ]; then
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branch_name=tvlc-"$1"
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fi
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;;
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--branch)
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shift
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branch_name="$1"
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;;
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--)
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shift
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break
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;;
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esac
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shift
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done
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if [ $# -eq 0 ]; then
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echo "error: workspace name, target derivations required"
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exit 1
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fi
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if [ -z "$checkout_name" ]; then
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# TODO(riking): deduce
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echo "error: workspace name (-n) required"
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exit 1
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fi
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if [ -d "$nice_checkout_root/$checkout_name" ]; then
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echo "error: checkout $checkout_name already exists"
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# nb: shellescape checkout_name because we expect the user to copy-paste it
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# shellcheck disable=SC1003
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echo "consider deleting it with tvlc remove '${checkout_name/'/\'}'"
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exit 1
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fi
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if [ -f "$DEPOT_ROOT/.git/refs/heads/$branch_name" ]; then
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echo "error: branch $branch_name already exists in git"
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# shellcheck disable=SC1003
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echo "consider deleting it with cd $DEPOT_ROOT; git branch -d '${checkout_name/'/\'}'"
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exit 1
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fi
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# The big one: call into Nix to figure out what paths the desired derivations depend on.
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readarray -t includedPaths < <("$depot_scanner" --mode 'print' --only 'DEPOT' --relpath --depot "$DEPOT_ROOT" --nix-bin "$tvix_instantiate" "$@")
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# bash math
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checkout_id=$(("$(cat "$tvlc_root/next_clientid")"))
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next_checkout_id=$(("$checkout_id"+1))
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echo "$next_checkout_id" > "$tvlc_root/next_clientid"
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checkout_dir="$tvlc_root/clients/$checkout_id"
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mkdir "$checkout_dir"
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cd "$DEPOT_ROOT"
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git worktree add --no-checkout -b "$branch_name" "$checkout_dir"
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# BUG: git not creating the /info/ subdir
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mkdir "$DEPOT_ROOT/.git/worktrees/$checkout_id/info"
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cd "$checkout_dir"
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git sparse-checkout init --cone
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git sparse-checkout set "${includedPaths[@]}"
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ln -s "$checkout_dir" "$nice_checkout_root"/"$checkout_name"
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echo "$nice_checkout_root/$checkout_name"
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