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List: git
Subject: Quoting of paths when pushing to Windows over SSH
From: Ben Boeckel <mathstuf () gmail ! com>
Date: 2022-02-15 18:15:28
Message-ID: YgvtwEPMCH3974e7 () erythro ! dev ! benboeckel ! internal
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Hi,
It seems that some quoting when creating the SSH command line for the
SSH transport needs some extra logic to handle remote hosts which are
not using POSIX shells (namely `cmd`). With the Windows "Enable SSH
Server" built-in feature, it ends up failing with this being attempted
(as reported by `GIT_TRACE=2`):
run_command: unset GIT_PREFIX; GIT_PROTOCOL=version=2 ssh -o SendEnv=GIT_PROTOCOL \
hostname 'C:/Progra~1/Git/mingw64/libexec/git-core/git-receive-pack.exe \
'\''remote/path'\'''
Of note here:
- I could not figure out a way to have a path with a space for
`git-receive-pack` (it just kept saying `C:\Program` is not a
program regardless of what kinds of quoting I tried), but DOS
shortnames suffice here at least.
- the remote path is single-quoted which is not stripped on the other
side, so the error that `'remote/path'` does not exist ends up
happening.
I do *not* want to change the default shell on the other side because it
is actually useful to be `cmd` in this instance (for `vcvarsall.bat`
namely) when logging in manually. Some potential solutions:
- a way to set the shell to use on the remote for ssh command;
- a way to say "use double quotes, not single quotes" (or some other
way to tell `sq_*` that we're not talking to POSIX on the other
side).
I was able to move forward for now with this patch that I'm using in a
specific build to talk to this remote (on top of 2.34.1) because I know
I don't have any special characters in my instance:
diff --git a/connect.c b/connect.c
index eaf7d6d261..a286feb812 100644
--- a/connect.c
+++ b/connect.c
@@ -1393,7 +1393,7 @@ struct child_process *git_connect(int fd[2], const char *url,
strbuf_addstr(&cmd, prog);
strbuf_addch(&cmd, ' ');
- sq_quote_buf(&cmd, path);
+ strbuf_addstr(&cmd, path);
/* remove repo-local variables from the environment */
for (var = local_repo_env; *var; var++)
What might be the best way of making this work more widely?
--Ben
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