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Wed, 5 Mar 2025 13:57:07 +0000 Message-ID: <7260a572-4302-4f8c-9d50-21286451b155@siemens.com> Date: Wed, 5 Mar 2025 14:57:06 +0100 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] deb-dl-dir: remove excessive calls to dpkg-deb in debsrc_download To: Cedric Hombourger , isar-users@googlegroups.com Cc: ubely@ilbers.de References: <20250305131142.2717692-1-cedric.hombourger@siemens.com> From: "'Jan Kiszka' via isar-users" Content-Language: en-US Autocrypt: addr=jan.kiszka@siemens.com; keydata= xsFNBGZY+hkBEACkdtFD81AUVtTVX+UEiUFs7ZQPQsdFpzVmr6R3D059f+lzr4Mlg6KKAcNZ uNUqthIkgLGWzKugodvkcCK8Wbyw+1vxcl4Lw56WezLsOTfu7oi7Z0vp1XkrLcM0tofTbClW xMA964mgUlBT2m/J/ybZd945D0wU57k/smGzDAxkpJgHBrYE/iJWcu46jkGZaLjK4xcMoBWB I6hW9Njxx3Ek0fpLO3876bszc8KjcHOulKreK+ezyJ01Hvbx85s68XWN6N2ulLGtk7E/sXlb 79hylHy5QuU9mZdsRjjRGJb0H9Buzfuz0XrcwOTMJq7e7fbN0QakjivAXsmXim+s5dlKlZjr L3ILWte4ah7cGgqc06nFb5jOhnGnZwnKJlpuod3pc/BFaFGtVHvyoRgxJ9tmDZnjzMfu8YrA +MVv6muwbHnEAeh/f8e9O+oeouqTBzgcaWTq81IyS56/UD6U5GHet9Pz1MB15nnzVcyZXIoC roIhgCUkcl+5m2Z9G56bkiUcFq0IcACzjcRPWvwA09ZbRHXAK/ao/+vPAIMnU6OTx3ejsbHn oh6VpHD3tucIt+xA4/l3LlkZMt5FZjFdkZUuAVU6kBAwElNBCYcrrLYZBRkSGPGDGYZmXAW/ VkNUVTJkRg6MGIeqZmpeoaV2xaIGHBSTDX8+b0c0hT/Bgzjv8QARAQABzSNKYW4gS2lzemth IDxqYW4ua2lzemthQHNpZW1lbnMuY29tPsLBlAQTAQoAPhYhBABMZH11cs99cr20+2mdhQqf QXvYBQJmWPvXAhsDBQkFo5qABQsJCAcCBhUKCQgLAgQWAgMBAh4BAheAAAoJEGmdhQqfQXvY zPAP/jGiVJ2VgPcRWt2P8FbByfrJJAPCsos+SZpncRi7tl9yTEpS+t57h7myEKPdB3L+kxzg K3dt1UhYp4FeIHA3jpJYaFvD7kNZJZ1cU55QXrJI3xu/xfB6VhCs+VAUlt7XhOsOmTQqCpH7 pRcZ5juxZCOxXG2fTQTQo0gfF5+PQwQYUp0NdTbVox5PTx5RK3KfPqmAJsBKdwEaIkuY9FbM 9lGg8XBNzD2R/13cCd4hRrZDtyegrtocpBAruVqOZhsMb/h7Wd0TGoJ/zJr3w3WnDM08c+RA 5LHMbiA29MXq1KxlnsYDfWB8ts3HIJ3ROBvagA20mbOm26ddeFjLdGcBTrzbHbzCReEtN++s gZneKsYiueFDTxXjUOJgp8JDdVPM+++axSMo2js8TwVefTfCYt0oWMEqlQqSqgQwIuzpRO6I ik7HAFq8fssy2cY8Imofbj77uKz0BNZC/1nGG1OI9cU2jHrqsn1i95KaS6fPu4EN6XP/Gi/O 0DxND+HEyzVqhUJkvXUhTsOzgzWAvW9BlkKRiVizKM6PLsVm/XmeapGs4ir/U8OzKI+SM3R8 VMW8eovWgXNUQ9F2vS1dHO8eRn2UqDKBZSo+qCRWLRtsqNzmU4N0zuGqZSaDCvkMwF6kIRkD ZkDjjYQtoftPGchLBTUzeUa2gfOr1T4xSQUHhPL8zsFNBGZY+hkBEADb5quW4M0eaWPIjqY6 aC/vHCmpELmS/HMa5zlA0dWlxCPEjkchN8W4PB+NMOXFEJuKLLFs6+s5/KlNok/kGKg4fITf Vcd+BQd/YRks3qFifckU+kxoXpTc2bksTtLuiPkcyFmjBph/BGms35mvOA0OaEO6fQbauiHa QnYrgUQM+YD4uFoQOLnWTPmBjccoPuiJDafzLxwj4r+JH4fA/4zzDa5OFbfVq3ieYGqiBrtj tBFv5epVvGK1zoQ+Rc+h5+dCWPwC2i3cXTUVf0woepF8mUXFcNhY+Eh8vvh1lxfD35z2CJeY txMcA44Lp06kArpWDjGJddd+OTmUkFWeYtAdaCpj/GItuJcQZkaaTeiHqPPrbvXM361rtvaw XFUzUlvoW1Sb7/SeE/BtWoxkeZOgsqouXPTjlFLapvLu5g9MPNimjkYqukASq/+e8MMKP+EE v3BAFVFGvNE3UlNRh+ppBqBUZiqkzg4q2hfeTjnivgChzXlvfTx9M6BJmuDnYAho4BA6vRh4 Dr7LYTLIwGjguIuuQcP2ENN+l32nidy154zCEp5/Rv4K8SYdVegrQ7rWiULgDz9VQWo2zAjo TgFKg3AE3ujDy4V2VndtkMRYpwwuilCDQ+Bpb5ixfbFyZ4oVGs6F3jhtWN5Uu43FhHSCqUv8 FCzl44AyGulVYU7hTQARAQABwsF8BBgBCgAmFiEEAExkfXVyz31yvbT7aZ2FCp9Be9gFAmZY +hkCGwwFCQWjmoAACgkQaZ2FCp9Be9hN3g/8CdNqlOfBZGCFNZ8Kf4tpRpeN3TGmekGRpohU bBMvHYiWW8SvmCgEuBokS+Lx3pyPJQCYZDXLCq47gsLdnhVcQ2ZKNCrr9yhrj6kHxe1Sqv1S MhxD8dBqW6CFe/mbiK9wEMDIqys7L0Xy/lgCFxZswlBW3eU2Zacdo0fDzLiJm9I0C9iPZzkJ gITjoqsiIi/5c3eCY2s2OENL9VPXiH1GPQfHZ23ouiMf+ojVZ7kycLjz+nFr5A14w/B7uHjz uL6tnA+AtGCredDne66LSK3HD0vC7569sZ/j8kGKjlUtC+zm0j03iPI6gi8YeCn9b4F8sLpB lBdlqo9BB+uqoM6F8zMfIfDsqjB0r/q7WeJaI8NKfFwNOGPuo93N+WUyBi2yYCXMOgBUifm0 T6Hbf3SHQpbA56wcKPWJqAC2iFaxNDowcJij9LtEqOlToCMtDBekDwchRvqrWN1mDXLg+av8 qH4kDzsqKX8zzTzfAWFxrkXA/kFpR3JsMzNmvextkN2kOLCCHkym0zz5Y3vxaYtbXG2wTrqJ 8WpkWIE8STUhQa9AkezgucXN7r6uSrzW8IQXxBInZwFIyBgM0f/fzyNqzThFT15QMrYUqhhW ZffO4PeNJOUYfXdH13A6rbU0y6xE7Okuoa01EqNi9yqyLA8gPgg/DhOpGtK8KokCsdYsTbk= In-Reply-To: <20250305131142.2717692-1-cedric.hombourger@siemens.com> Content-Type: text/plain; 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dkim=pass header.i=@siemens.com header.s=selector2 header.b=lufiKlZv; arc=pass (i=1 spf=pass spfdomain=siemens.com dkim=pass dkdomain=siemens.com dmarc=pass fromdomain=siemens.com); spf=pass (google.com: domain of jan.kiszka@siemens.com designates 2a01:111:f403:c201::5 as permitted sender) smtp.mailfrom=jan.kiszka@siemens.com; dmarc=pass (p=REJECT sp=REJECT dis=NONE) header.from=siemens.com X-Original-From: Jan Kiszka Reply-To: Jan Kiszka Precedence: list Mailing-list: list isar-users@googlegroups.com; contact isar-users+owners@googlegroups.com List-ID: X-Spam-Checked-In-Group: isar-users@googlegroups.com X-Google-Group-Id: 914930254986 List-Post: , List-Help: , List-Archive: , List-Unsubscribe: , X-Spam-Status: No, score=-4.9 required=5.0 tests=DKIMWL_WL_MED,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,MAILING_LIST_MULTI, RCVD_IN_DNSWL_BLOCKED,RCVD_IN_MSPIKE_H3,RCVD_IN_MSPIKE_WL, RCVD_IN_RP_CERTIFIED,RCVD_IN_RP_RNBL,RCVD_IN_RP_SAFE,SPF_PASS autolearn=unavailable autolearn_force=no version=3.4.2 X-Spam-Checker-Version: SpamAssassin 3.4.2 (2018-09-13) on shymkent.ilbers.de X-TUID: 0Tjw4qlfXii0 On 05.03.25 14:11, 'Cedric Hombourger' via isar-users wrote: > Several calls to dpkg-deb are made for each single .deb file found in > downloads to parse individual fields. This approach is terribly slow > when a large amount of .deb files are found. Use apt-ftparchive to Out of curiosity: What is roughly the amount of packages where this inefficiency becomes visible? > produce an index of packages that were found and a simple awk script > to produce a (sorted) list of source package names and their versions. > Also avoid using sed to remove Epoch from the version when we are > trying to determine the name of the .dsc file: we instead use a simple > POSIX parameter expansion to remove everything up to the first colon > > Signed-off-by: Cedric Hombourger > --- > meta/classes/deb-dl-dir.bbclass | 62 +++++++++++++++++++-------------- > 1 file changed, 35 insertions(+), 27 deletions(-) > > diff --git a/meta/classes/deb-dl-dir.bbclass b/meta/classes/deb-dl-dir.bbclass > index 7ebd057e..53ce4538 100644 > --- a/meta/classes/deb-dl-dir.bbclass > +++ b/meta/classes/deb-dl-dir.bbclass > @@ -5,23 +5,6 @@ > > inherit repository > > -is_not_part_of_current_build() { > - local package="$( dpkg-deb --show --showformat '${Package}' "${1}" )" > - local arch="$( dpkg-deb --show --showformat '${Architecture}' "${1}" )" > - local version="$( dpkg-deb --show --showformat '${Version}' "${1}" )" > - # Since we are parsing all the debs in DEBDIR, we can to some extend > - # try to eliminate some debs that are not part of the current multiconfig > - # build using the below method. > - local output="$( grep -xhs ".* status installed ${package}:${arch} ${version}" \ > - "${IMAGE_ROOTFS}"/var/log/dpkg.log \ > - "${SCHROOT_HOST_DIR}"/var/log/dpkg.log \ > - "${SCHROOT_TARGET_DIR}"/var/log/dpkg.log \ > - "${SCHROOT_HOST_DIR}"/tmp/dpkg_common.log \ > - "${SCHROOT_TARGET_DIR}"/tmp/dpkg_common.log | head -1 )" > - > - [ -z "${output}" ] > -} > - > debsrc_do_mounts() { > sudo -s < set -e > @@ -54,16 +37,41 @@ debsrc_download() { > ( flock 9 > set -e > printenv | grep -q BB_VERBOSE_LOGS && set -x > - find "${rootfs}/var/cache/apt/archives/" -maxdepth 1 -type f -iname '*\.deb' | while read package; do > - is_not_part_of_current_build "${package}" && continue > - local src="$( dpkg-deb --show --showformat '${source:Package}' "${package}" )" > - local version="$( dpkg-deb --show --showformat '${source:Version}' "${package}" )" > - local dscname="$(echo ${src}_${version} | sed -e 's/_[0-9]\+:/_/')" > - local dscfile=$(find "${DEBSRCDIR}"/"${rootfs_distro}" -name "${dscname}.dsc") > - [ -n "$dscfile" ] && continue > - > - sudo -E chroot --userspec=$( id -u ):$( id -g ) ${rootfs} \ > - sh -c ' mkdir -p "/deb-src/${1}/${2}" && cd "/deb-src/${1}/${2}" && apt-get -y --download-only --only-source source "$2"="$3" ' download-src "${rootfs_distro}" "${src}" "${version}" > + > + # Use apt-ftparchive to scan all .deb files found in the download directory > + # and produce an index that we can "parse" with awk. This is much faster > + # than parsing each .deb file individually using dpkg-deb. Lines from the > + # index we need are: > + # > + # Package: > + # Version: > + # Source: () > + # > + # If Source is omitted, then = and > + # if is not specified then it is . > + # The awk script handles these optional fields. It looks for Size: as a > + # trigger to print the source,version tupple > + > + apt-ftparchive --md5=no --sha1=no --sha256=no --sha512=no \ > + -a "${DISTRO_ARCH}" packages \ > + "${rootfs}/var/cache/apt/archives" \ > + | awk '/^Package:/ { s=$2; } > + /^Version:/ { v=$2; next } > + /^Source:/ { s=$2; if ($3 ~ /^\(/) v=substr($3, 2, length($3)-2) } > + /^Size:/ { print s, v}' \ > + | sort -u \ > + | while read src version; do > + # Name of the .dsc file does not include Epoch, remove it before checking > + # if sources were already downloaded. Avoid using sed here to reduce the > + # number of processes being spawned by this function: we assume that the > + # version is correctly formatted and simply strip everything up to the > + # first colon > + dscname="${src}_${version#*:}.dsc" > + [ -f "${DEBSRCDIR}"/"${rootfs_distro}"/"${src}"/"${dscname}" ] || { > + # use apt-get source to download sources in DEBSRCDIR > + sudo -E chroot --userspec=$( id -u ):$( id -g ) ${rootfs} \ > + sh -c ' mkdir -p "/deb-src/${1}/${2}" && cd "/deb-src/${1}/${2}" && apt-get -y --download-only --only-source source "$2"="$3" ' download-src "${rootfs_distro}" "${src}" "${version}" Can we rewrap this horribly long line at that chance? > + } > done > ) 9>"${DEBSRCDIR}/${rootfs_distro}.lock" > Did you also consider using a python function for the content processing? I'm not predicting that this will be faster or nicer or whatever, just wondering if it might be while reading the above. Jan -- Siemens AG, Foundational Technologies Linux Expert Center -- You received this message because you are subscribed to the Google Groups "isar-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to isar-users+unsubscribe@googlegroups.com. To view this discussion visit https://groups.google.com/d/msgid/isar-users/7260a572-4302-4f8c-9d50-21286451b155%40siemens.com.