Failure with Python 3 but without Python 2, due to build_tar shebang

[tchernobog]

Hi, I have only the python3 binary installed, no "python" binary (corresponding to python2) since my distribution is dropping python2 support. Whenever I try to build a rust image, I get the following error, I think due to a wrong shebang for build_tar. I am not sure how to change the generation of the build_tar script to use py3wrapper.sh instead, which seems to have the right logic for python interpreter detection.

Also passing --extra_toolchains=@bazel_tools//tools/python:autodetecting_toolchain_nonstrict does not work.

INFO: Analyzed target //components/hello-kube:hello-kube (84 packages loaded, 7276 targets configured).
INFO: Found 1 target...
ERROR: /home/matteo/.cache/bazel/_bazel_matteo/0bbabc6ffd05b81064152f7846d51e79/external/cc_image_base/image/BUILD:4:17: SHA256 external/cc_image_base/image/000.tar.gz.nogz.sha256 failed (Exit 127) linux-sandbox failed: error executing command 
  (cd /home/matteo/.cache/bazel/_bazel_matteo/0bbabc6ffd05b81064152f7846d51e79/sandbox/linux-sandbox/36/execroot/__main__ && \
  exec env - \
    LD_LIBRARY_PATH=:/home/matteo/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib:/home/matteo/.rustup/toolchains/nightly-x86_64-unknown-linux-gnu/lib \
    PATH=/home/matteo/.yarn/bin:/home/matteo/.config/yarn/global/node_modules/.bin:/home/matteo/.scripts:/home/matteo/.gem/ruby/2.5.0/bin:/home/matteo/.cargo/bin:/home/matteo/.local/bin:/bin:/usr/lib/ccache:/home/matteo/.cargo/bin:/home/matteo/.cargo/bin:/home/matteo/.yarn/bin:/home/matteo/.config/yarn/global/node_modules/.bin:/home/matteo/.scripts:/home/matteo/.gem/ruby/2.5.0/bin:/home/matteo/.cargo/bin:/home/matteo/.local/bin:/bin:/usr/lib/ccache:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/snap/bin:/home/matteo/Android/Sdk/platform-tools:/home/matteo/.npm-packages/bin:/home/matteo/Android/Sdk/platform-tools:/home/matteo/.npm-packages/bin \
    TMPDIR=/tmp \
  /home/matteo/.cache/bazel/_bazel_matteo/install/129c3d389c2d09bb0ad5b4a301d67a9c/linux-sandbox -t 15 -w /home/matteo/.cache/bazel/_bazel_matteo/0bbabc6ffd05b81064152f7846d51e79/sandbox/linux-sandbox/36/execroot/__main__ -w /tmp -w /dev/shm -D -- bazel-out/host/bin/external/bazel_tools/tools/build_defs/hash/sha256 bazel-out/k8-fastbuild/bin/external/cc_image_base/image/000.tar.gz.nogz bazel-out/k8-fastbuild/bin/external/cc_image_base/image/000.tar.gz.nogz.sha256)
src/main/tools/linux-sandbox.cc:156: linux-sandbox-pid1 has PID 67620
src/main/tools/process-tools.cc:131: sigaction(32, &sa, nullptr) failed
src/main/tools/process-tools.cc:131: sigaction(33, &sa, nullptr) failed
src/main/tools/linux-sandbox-pid1.cc:176: working dir: /home/matteo/.cache/bazel/_bazel_matteo/0bbabc6ffd05b81064152f7846d51e79/sandbox/linux-sandbox/36/execroot/__main__
src/main/tools/linux-sandbox-pid1.cc:208: writable: /home/matteo/.cache/bazel/_bazel_matteo/0bbabc6ffd05b81064152f7846d51e79/sandbox/linux-sandbox/36/execroot/__main__
src/main/tools/linux-sandbox-pid1.cc:208: writable: /tmp
src/main/tools/linux-sandbox-pid1.cc:208: writable: /dev/shm
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/kernel/security
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/fs/cgroup
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/fs/cgroup/unified
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/fs/cgroup/systemd
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/fs/cgroup/freezer
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/fs/cgroup/net_cls,net_prio
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/fs/cgroup/cpuset
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/fs/cgroup/perf_event
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/fs/cgroup/blkio
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/fs/cgroup/devices
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/fs/cgroup/rdma
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/fs/cgroup/cpu,cpuacct
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/fs/cgroup/pids
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/fs/cgroup/memory
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/fs/pstore
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/firmware/efi/efivars
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/fs/bpf
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/kernel/debug
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/kernel/tracing
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /sys/fs/fuse/connections
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /dev
src/main/tools/linux-sandbox-pid1.cc:279: remount rw: /dev/shm
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /dev/pts
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /dev/mqueue
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /dev/hugepages
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /run
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /run/lock
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /run/rpc_pipefs
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /run/user/1000
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /run/user/1000/gvfs
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /run/user/1000/doc
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /proc
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /proc/sys/fs/binfmt_misc
src/main/tools/linux-sandbox-pid1.cc:300: remount(nullptr, /proc/sys/fs/binfmt_misc, nullptr, 2101281, nullptr) failure (Operation not permitted) ignored
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /proc/sys/fs/binfmt_misc
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /home
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /snap/gtk-common-themes/1506
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /snap/snapd/8790
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /snap/gnome-3-28-1804/128
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /snap/airtame-application/x1
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /boot
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /boot/efi
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /snap/core18/1885
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /snap/core18/1880
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /snap/snapd/9279
src/main/tools/linux-sandbox-pid1.cc:279: remount ro: /var/lib/docker/btrfs
src/main/tools/linux-sandbox-pid1.cc:279: remount rw: /home/matteo/.cache/bazel/_bazel_matteo/0bbabc6ffd05b81064152f7846d51e79/sandbox/linux-sandbox/36/execroot/__main__
src/main/tools/linux-sandbox-pid1.cc:279: remount rw: /home/matteo/.cache/bazel/_bazel_matteo/0bbabc6ffd05b81064152f7846d51e79/sandbox/linux-sandbox/36/execroot/__main__
src/main/tools/linux-sandbox-pid1.cc:279: remount rw: /tmp
src/main/tools/linux-sandbox-pid1.cc:279: remount rw: /dev/shm
src/main/tools/process-tools.cc:131: sigaction(32, &sa, nullptr) failed
src/main/tools/process-tools.cc:131: sigaction(33, &sa, nullptr) failed
/usr/bin/env: 'python': No such file or directory
src/main/tools/linux-sandbox-pid1.cc:436: waitpid returned 2
src/main/tools/linux-sandbox-pid1.cc:456: child exited with code 127
src/main/tools/linux-sandbox.cc:206: child exited normally with exitcode 127
Target //components/hello-kube:hello-kube failed to build
Use --verbose_failures to see the command lines of failed build steps.
INFO: Elapsed time: 7.764s, Critical Path: 0.02s
INFO: 0 processes.
FAILED: Build did NOT complete successfully

My WORKSPACE:

load("@bazel_tools//tools/build_defs/repo:http.bzl", "http_archive")

http_archive(
    name = "bazel_skylib",
    urls = [
        "https://github.com/bazelbuild/bazel-skylib/releases/download/1.0.3/bazel-skylib-1.0.3.tar.gz",
        "https://mirror.bazel.build/github.com/bazelbuild/bazel-skylib/releases/download/1.0.3/bazel-skylib-1.0.3.tar.gz",
    ],
    sha256 = "1c531376ac7e5a180e0237938a2536de0c54d93f5c278634818e0efc952dd56c",
)

http_archive(
    name = "io_bazel_rules_rust",
    sha256 = "9158524bbbdfded6326d00e76d4fb293efbb07d4e4881416210bac221613432f",
    strip_prefix = "rules_rust-7d9e890c58ca00eacf8dd4a2ba991cfe9c3f44e4",
    urls = [
        "https://github.com/bazelbuild/rules_rust/archive/7d9e890c58ca00eacf8dd4a2ba991cfe9c3f44e4.tar.gz",
    ],
)

http_archive(
    name = "io_bazel_rules_docker",
    sha256 = "316c5ee34a624dbe50b1967ea6c471f7f5a3982f06734644e7340a32cf2e155f",
    strip_prefix = "rules_docker-bd64baac70176e782828b437319e1d4e9ecac8cf",
    urls = [
        "https://github.com/bazelbuild/rules_docker/archive/bd64baac70176e782828b437319e1d4e9ecac8cf.tar.gz"
    ],
)

# ----------------------------------------------------------------------

load("@io_bazel_rules_rust//:workspace.bzl", "bazel_version")
bazel_version(name = "bazel_version")

load("@bazel_skylib//:workspace.bzl", "bazel_skylib_workspace")
bazel_skylib_workspace()

load("@io_bazel_rules_rust//rust:repositories.bzl", "rust_repositories")
rust_repositories(version = "1.44.0", edition = "2018")

load("@io_bazel_rules_docker//repositories:repositories.bzl", container_repositories = "repositories")
container_repositories()

load("@rules_python//python:pip.bzl", "pip_repositories", "pip3_import")
pip_repositories()
pip3_import( # force usage of python3 over python2 for pip
    name = "pip_deps",
    requirements = "@io_bazel_rules_docker//repositories:requirements-pip.txt",
)
load("@io_bazel_rules_docker//repositories:deps.bzl", container_deps = "deps")
container_deps()

load("@io_bazel_rules_docker//repositories:pip_repositories.bzl", "pip_deps")
pip_deps()

load("@io_bazel_rules_docker//rust:image.bzl", rust_image_repos = "repositories")
rust_image_repos()

BUILD:

load("@io_bazel_rules_docker//rust:image.bzl", "rust_image")

rust_image(
    name = "hello-kube",
    srcs = ["src/bin.rs"],
)

[tchernobog]

Apparently this is an issue present in Bazel itself. See bazelbuild/bazel#11554. Closing in favor of upstream issue.