Re: [PATCH v2 1/3] Add script to generate a recipe for cargo.io crates

["'Quirin Gylstorff' via isar-users" <isar-users@googlegroups.com>]

On 4/16/26 3:09 PM, Anton Mikanovich wrote:
> 31.03.2026 11:10, 'Quirin Gylstorff' via isar-users wrote:
>> From: Quirin Gylstorff <quirin.gylstorff@siemens.com>
>>
>> This script allows to create a recipe for building rust crates which
>> are not part of Debian. It uses for this `debcargo package` and follows
>> the process defined in https://rust-team.pages.debian.net/book.
>>
>> Signed-off-by: Quirin Gylstorff <quirin.gylstorff@siemens.com>
>> ---
>>   scripts/generate_cargo_crate.sh | 88 +++++++++++++++++++++++++++++++++
>>   1 file changed, 88 insertions(+)
>>   create mode 100755 scripts/generate_cargo_crate.sh
>>
>> diff --git a/scripts/generate_cargo_crate.sh b/scripts/ 
>> generate_cargo_crate.sh
>> new file mode 100755
>> index 00000000..727f7f0e
>> --- /dev/null
>> +++ b/scripts/generate_cargo_crate.sh
>> @@ -0,0 +1,88 @@
>> +#!/bin/bash
>> +# This software is a part of ISAR.
>> +# Copyright (C) 2026 Siemens AG
>> +
>> +usage() {
>> +    echo "This script generates a scaffold for rust crates from 
>> crates.io."
>> +    echo "It uses debcargo to download and generate the debian folder."
>> +    echo "USAGE: $0 <CRATE_NAME> [CRATE_VERSION]"
>> +}
>> +
>> +if [ $# -eq 0 ]; then
>> +    usage
>> +    exit 1
>> +fi
>> +case $1 in
>> +    -h|--help)
>> +            usage
>> +            exit 0
>> +            ;;
>> +    *)
>> +        true
>> +        ;;
>> +esac
>> +
>> +package_name=$1
>> +package_version=
>> +if [ $# -gt 1 ]; then
>> +    package_version=$2
>> +fi
>> +
>> +export NAME="isar-users isar"
>> +
>> +for dep in jq debcargo curl; do
>> +    if ! command -v "$dep" ;then
>> +        echo "Could not find tool dependency $dep !"
>> +        exit 1
>> +    fi
>> +done
>> +
>> +source_name="rust-$package_name"
>> +mkdir -p "$source_name/files"
>> +# generate in the current directory to avoid the following
>> +# debcargo error:
>> +# Invalid cross-device link (os error 18)
>> +TMP_DIR=$(mktemp -d -p .)
>> +pushd "$source_name" || exit 1
>> +debcargo package "$package_name" "$package_version" --directory 
>> "$TMP_DIR"
>> +cp -r "${TMP_DIR}"/debian files/
>> +if [ -z "$package_version" ]; then
>> +    package_version=$(grep -oP "X-Cargo-Crate-Version:\K.*" 
>> "${TMP_DIR}"/debian/control | tr -d "[:blank:]")
>> +fi
>> +rm -rf "$TMP_DIR"
>> +tarball_checksum="$(curl --silent "https://crates.io/api/v1/crates/ 
>> ${package_name}/${package_version}" | jq ".version.checksum" )"
>> +if [ "${tarball_checksum}" = "null" ] ; then
>> +    echo "$package_name in $package_version could not be found in 
>> crates.io"
>> +    exit 1
>> +fi
>> +cat << EOF >> "${source_name}_${package_version}".bb
>> +# Created by generate_cargo_crate.sh.
>> +# SPDX-License-Identifier: MIT-0
>> +
>> +inherit dpkg
>> +
>> +SRC_URI = "https://crates.io/api/v1/crates/${package_name}/\${PV}/ 
>> download;downloadfilename=${PN}_${PV}.tar.gz"
>> +SRC_URI += "file://debian"
>> +
>> +SRC_URI[sha256sum] = ${tarball_checksum}
>> +
>> +S = "\${WORKDIR}/${package_name}-\${PV}"
>> +
>> +# In most cases we want to package a library crate from crates.io
>> +PROVIDES += "librust-${package_name}-dev"
>> +
>> +do_prepare_build() {
>> +    cp -r \${WORKDIR}/debian \${S}/
>> +    cd \${WORKDIR}
>> +    tar cJf \${PN}_\${PV}.orig.tar.xz \${TAR_REPRO_OPTS} 
>> ${package_name}-\${PV}
>> +}
>> +EOF
>> +
>> +
>> +popd || exit 1
>> +
>> +echo "Finished generating isar scaffold for package $package_name in 
>> version $package_version"
>> +echo ""
>> +echo "Next steps:"
>> +echo "  - Check if the package builds and add the necessary patches, 
>> e.g. relax dependencies to the debian folder."
>> +echo "  - Also add the package to Debian by following https://rust- 
>> team.pages.debian.net/book/"
> 
> Hello Quirin,
> 
> Bitbake is already support cargo fetching with SRC_URI like "crate:// 
> crates.io/name/${package_name}/${PV}".
> Maybe it will be more clear?

We can use it - I didn't like it as we need to set variable 
BP="$package_name"

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