clone: accept DEPTH env var as fallback for --depth#2333
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Submitted as [email protected] To fetch this version into To fetch this version to local tag |
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"Matt Hunter" wrote on the Git mailing list (how to reply to this email): On Fri Jun 12, 2026 at 9:39 PM EDT, h8d13 via GitGitGadget wrote:
> @@ -1022,6 +1022,12 @@ int cmd_clone(int argc,
> usage_msg_opt(_("You must specify a repository to clone."),
> builtin_clone_usage, builtin_clone_options);
>
> + if (!option_depth) {
> + const char *env_depth = getenv("DEPTH");
Nearly all of the non-standard environment variables used by git start
with "GIT_". "GIT_CLONE_DEPTH" may be a better choice.
> + if (env_depth && *env_depth)
> + option_depth = xstrdup(env_depth);
Following normal command-line option parsing, if --depth is given, then
option_depth points to the parsed string from cmd_clone's argv array
directly and is not freed. Therefore, the string copy returned via
xstrdup also goes unfreed before it is lost.
One might argue this isn't very impactful, since we would expect the
process to exit after git-clone completes, but there are already several
explicit calls to free and related functions at the end of cmd_clone.
> + }
> +
> if (option_depth || option_since || option_not.nr)
> deepen = 1;
> if (option_single_branch == -1)
>
> base-commit: 3e65291872de10c3f0bf05ea8c24187e7a71ebf0
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User |
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There are issues in commit d4c3989:
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When renaming the var and adding tests, please squash those changes into the first commit and revise its message (which also mentions DEPTH) to account for the rename. |
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There are issues in commit 21f8b0e:
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When git clone is run by a tool the user does not control directly (CI runners, package build scripts such as makepkg, or any wrapper that spawns nested clones), there is no way to request a shallow clone: --depth only exists as a command-line option on the process that invokes git clone, and unlike url.*.insteadOf there is no configuration key that could be injected via GIT_CONFIG_* to achieve the same effect. Teach git clone to read the environment variable when --depth is not given on the command line. Since environment variables propagate to child processes, exporting an env var once makes every nested clone underneath shallow, which is useful in CI pipelines and recursive build tools. An explicit --depth on the command line still takes precedence, and the value goes through the existing validation, so a non-positive DEPTH dies with the same error as a non-positive --depth. Edits: add t/ tests, doc line and leak fix from Matt / davvid feedback Signed-off-by: h8d13 <[email protected]>
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@davvid did just that :) thanks again for the tips. |
In git clone --depth 1 <url> <dest>
cd dest
bash run.sh
# here run.sh has its own clone dependencies (perhaps even multiple)
# --depth 1 is now lostHopefully that explains better the need |
cc: "Matt Hunter" [email protected]