How do I override the use of /tmp when building with Bazel?

Question

I am building a large Bazel project in a cloud VM with /tmp in a small filesystem (~8 GB). Occasionally my build fails with the error Not all outputs were created : the filesystem containing /tmp is at 99% of capacity, and /tmp contains many Bazel build artifacts.

How can I override the temporary directory that Bazel uses? I tried setting the TEMP and TMPDIR environment variables when starting bazel build , but this did not help.

Answer 1

You can set --output_base to put all output in a non-default directory:

bazel --output_base=/dir/with/more/free/space build //foo

However, I don't think Bazel will use /tmp (by default) after you've installed it (the installer does use /tmp), so perhaps you're hitting a different problem.

Answer 2

If you are using the configure_make rule from rules_foreign_cc , unfortunately you have no way to influence where the built deps are stored.
See https://github.com/bazelbuild/rules_foreign_cc/blob/master/cc_configure_make/def.bzl#L44

"tmpdir=$(mktemp -d)",
"tmpinstalldir=$(mktemp -d)",

Answer 3

I think you want the --test_tmpdir=<a_path> command line argument to the bazel command.

--test_tmpdir=<a path> default: see description
    Specifies the base temporary directory for 'bazel test' to use.

Answer 4

您还可以参考 Bazel 的手册，描述输出目录布局