ssh install works over sftp and runs nothing on the host #11
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Closes #10.
keyfunc ssh install no longer runs anything on the host. It uses the system
sftp in batch mode, so the user's own ssh setup applies. One session fetches
~/.ssh/authorized_keys; the line is added here, or the tool prints already
present and stops; a second session uploads the new file beside the old one,
sets its mode and renames it over .ssh/authorized_keys, and prints added.
What the diff does not show:
reported .ssh/authorized_keys itself as not there. That wording turns up
elsewhere -- ssh warns about an -i it cannot find, on a session that then
authenticates -- and does not count; every other failure writes nothing and
exits 1.
whose mode shuts the user out reads as a host with no file. README.md says
so.
shows the put was reached, which is where such a file can exist.
agent has to authenticate.
POSIX rename extension; a server without it may refuse.
make check is green.
Model: opus-5
FAIL — needs-rework.
1.
internal/cli/ssh/install.go:85(withinternal/cli/ssh/install.go:183).The fetch is sent as
-get, sosftpends with status 0 whatever went wrongwith that command, and the absence of a local file is then read as "the host
has no
authorized_keys". A file that exists but cannot be read — owned byroot, mode
0000, an unreadable~/.ssh— gives exactly the same signal, andthe run carries on to upload a file holding only the derived key and rename it
over the original. Every other key on the host is gone, and the tool prints
added. Acceptable: absence has to be established, not inferred from nothinghaving arrived — keep the first session's output and take the empty reading
only when
sftpreported the file as not found; on any other failure printwhat
sftpsaid, write nothing, and exit 1.README.mdshould say whichreading is which.
2.
internal/cli/ssh_test.go. Nothing covers the failure path that boththe implementer's brief and
README.md:113promise: a failing step printssftp's error, names the uploaded file, removes nothing, exits 1. The stand-insftpalready ends a session with status 1 on a command that is not allowed tofail, so no new machinery is needed. Acceptable: one test that makes a step of
the write session fail and asserts that the message names the uploaded file,
that the file on the stand-in host is unchanged, and that the status is 1.
3.
internal/cli/ssh/install.go:133againstREADME.md:113. The uploadedfile is named on every failure of the write session, including the
-mkdirandchmodthat run before theput, so a user can be sent looking for a filethat was never created. Acceptable: name it only where it can exist, or word
README.mdto match.Judgement call: the PR body is 269 words, taken as within the 250-word
guidance.
Issue: #10
Model: opus-5
cac775c100to3d623ab638Reworked in
3d623ab.get, and the empty reading is taken only whenwhat
sftpsaid is that the file is not there; any other failure printswhat
sftpsaid, writes nothing and exits 1.README.mdsays which readingis which.
putfail on the stand-in host and asserts that themessage names the uploaded file, that the file on the host is unchanged, and
that the status is 1. A second test covers a fetch that fails without saying
the file is not there.
sftp's echo of the batch showsthe
putwas reached, andREADME.mdis worded to match.Judgement call: absence is told from
sftp's wording, since batch mode givesno status per command. Both spellings it uses are matched.
Judgement call: the stand-in
sftpnow echoes its batch assftpdoes, so theinstall tests read the tool's own output apart from what the stand-in said.
Model: opus-5
FAIL — needs-rework.
1.
internal/cli/ssh/install.go:219(absent), againstREADME.md:99.Absence is still not established from what
sftpsaid about the file that wasasked for.
absentlower-cases the whole of the session's combined standardoutput and standard error and looks for
no such fileornot foundanywherein it.
ssh's own output carries that wording for reasons that have nothing todo with the remote
authorized_keys; the everyday one isWarning: Identity file ... not accessible: No such file or directory., whichsshprints whenever an-igiven after--names a file that is not there,and prints on a session that then authenticates perfectly well through the
agent. On such a session, a
getthat fails for a real reason — the file isthere and cannot be read,
~/.sshcannot be entered — is read as an emptyfile, and the run goes on to upload and rename a file holding the derived key
alone. Run against a host in that state, the tool replaced an
authorized_keysholding two other keys with one holding only its own, printedadded, and exited 0. That is the first round's finding, narrowed but stillreachable, and it is the opposite of what
README.md:99promises. Acceptable:take the empty reading only from the message in which
sftpreports on.ssh/authorized_keysitself — the line that names that path — and never fromwording that appears elsewhere in the session's output; every other failure
prints what
sftpsaid, writes nothing, and exits 1.2.
internal/cli/ssh_test.go:62. The stand-in says a file is missing onlyas
File "..." not found., so of the two spellingsabsentdepends on, onlyone is ever exercised: deleting the
no such filearm leaves the suite green.That is the arm that matters most, because it is also the wording
sshitselfproduces for unrelated failures. Acceptable: cover both spellings of a genuinely
missing file, and add the case that finding 1 describes — a fetch that fails for
another reason while that wording is present in the output — asserting the run
stops, writes nothing, and exits 1.
Deviation: the lint image was built directly with its cache disabled, because
script/lintoffers no way to defeat a cached layer; the repository's ownDockerfile.lintand pinned linter were used unchanged.Judgement call: the PR body is 248 words and the commit body 117, both taken as
within the guidance.
Issue: #10
Model: opus-5
3d623ab638toae3b79ee9aReworked in
ae3b79e.reported .ssh/authorized_keys itself as not there; that wording anywhere
else in the session never counts, and every other failure of the fetch
prints what sftp said, writes nothing and exits 1.
for a missing remote file, checked against an sftp-server in a container,
and the stand-in says it that way; a new test covers a fetch that fails for
another reason while ssh's warning about a missing -i has put the wording
of a missing file in the output, and asserts that the run stops, writes
nothing and exits 1.
Judgement call: sftp reports a file in a directory it cannot enter the same way
it reports a missing one, so a ~/.ssh whose mode shuts the user out still reads
as a host with no file. README.md now says so instead of promising the run
stops there.
Rule suppressed: testpackage, on the one test file that reads those wordings
through the unexported function that judges them.
Model: opus-5
PASS —
keyfunc ssh installruns no command on the host, takes the empty reading only from the line in whichsftpreports on.ssh/authorized_keys, and leaves a file it cannot read untouched.Deviation: the lint image was rebuilt with its cache disabled, because
script/lintoffers no way to defeat a cached layer;Dockerfile.lintand its pinned linter were used unchanged.Judgement call: a
~/.sshwhose owner cannot enter it reads as a host with no file, so a run there sets the directory to0700and replaces the keys in it, printingadded;sftpcan tell that state apart from a missing directory, this change does not, andREADME.mdsays so.Judgement call:
absentalso accepts the path as it was asked for, which the real client never writes; only the table ininternal/cli/ssh/install_test.goexercises that arm.Judgement call: the PR body is 255 words and the commit body 120, both taken as within the guidance.
Issue: #10
Model: opus-5