Files
stack/packages/mosaic/framework/tools/git/test-issue-create-body-safety.sh
T
fred 15644d81d4 fix(#1356): tea login resolution fails closed on a declared git identity
get_gitea_login_for_host() returned the FIRST tea login matching the host. With
43 logins on this host, roughly half match one server, so a seat whose own login
was missing silently acted as whichever identity happened to sort first. That
satisfies gate 16 mechanically (an author and a reviewer exist) while violating
it (both are the same actor under two names).

A seat now declares itself via MOSAIC_GIT_IDENTITY or `git config
mosaic.gitIdentity`, and resolution derives the canonical login name from that
identity plus the instance (`<instance>-<seat>`). If that login is absent it
fails closed with a named error and the command to create it. It never borrows.

Same rule on the --repo override path, which had it worse: it fell through to
get_default_tea_login(), i.e. the default-marked login or, failing that, the
first login of ANY host -- an identity chosen by config file order. The four
callers now pass the owner so the instance can be derived. With no identity set
(a human at a terminal) the old fallback is unchanged, which is the same point
at which the token path stops enforcing.

lane-brief.sh mapped owners straight to the SHARED `usc` / `mosaicstack` logins.
The ladder now goes first there, and a seat that cannot resolve its own login
exits rather than falling through to a shared one.

Also adds tools/fleet/seat-logins.sh: projects seat credentials into tea logins
under canonical names, so the name this code requires is one an operator can
mechanically produce rather than hand-maintain.

Test notes:
- The suite had TWO sandbox helpers, run_in_repo and a near-copy run_in_repo2.
  The copy drifted: it never got the identity unset, so the suite kept failing on
  a provisioned seat after the original was already fixed. run_in_repo2 now
  delegates, so the guarantee lives in one place.
- New coverage for both ladder branches (login present -> used; absent -> named
  error and NOTHING on stdout, proving it did not borrow the matching login
  sitting right there), both identity rungs, the --repo path, and explicit
  GITEA_LOGIN outranking the ladder. Each verified by injecting the regression it
  claims to catch and confirming it goes red.
- test-issue-create-body-safety.sh now pins the no-identity case; its subject is
  body quoting, and an ambient seat identity made it fail for an unrelated reason.
- test-issue-close-fail-closed.sh derives its fixture login from the runner's
  identity. This does not make it hermetic and does not claim to: its API-path
  cases need a real credential for the runner's own identity, so it passes only
  where the runner owns one, on this branch and on its base alike. Pre-existing,
  documented in the PR rather than papered over.
2026-08-21 16:01:30 -05:00

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#!/usr/bin/env bash
# Regression harness for issue-create.sh Markdown-body safety (#559).
#
# Guards against reintroduction of eval-based command construction. The wrapper
# builds its tea/gh invocation as an argv array, so a body containing command
# substitution ($(...)), backticks, quotes, and dollar signs MUST reach tea
# verbatim and MUST NOT be shell-evaluated. This test asserts both:
# 1. No command-substitution side effect (an injected `touch SENTINEL` never runs).
# 2. The --description value tea receives is byte-for-byte the original body.
set -euo pipefail
# HERMETICITY (#1356): this suite's subject is body quoting, not identity. An
# ambient MOSAIC_GIT_IDENTITY (every provisioned seat exports one) would make the
# identity ladder demand a per-seat login this fixture does not define, and the
# suite would fail for a reason it is not testing.
unset MOSAIC_GIT_IDENTITY
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
WORK_DIR="${MOSAIC_TEST_WORK_DIR:-$PWD/.mosaic-test-work/issue-create-body-safety}"
REPO_DIR="$WORK_DIR/repo"
BIN_DIR="$WORK_DIR/bin"
SENTINEL="$WORK_DIR/INJECTION_SENTINEL"
BODY_FILE="$WORK_DIR/body.txt"
RECEIVED_FILE="$WORK_DIR/received-description.txt"
rm -rf "$WORK_DIR"
mkdir -p "$REPO_DIR" "$BIN_DIR"
git -C "$REPO_DIR" init -q
git -C "$REPO_DIR" remote add origin https://git.mosaicstack.dev/mosaicstack/stack.git
# Hostile Markdown body. The unquoted heredoc expands $SENTINEL (a real path we
# want embedded) but every shell metacharacter we care about is backslash-escaped
# so the TEST shell writes them literally into the file — the bytes the wrapper
# must then preserve.
cat > "$BODY_FILE" <<EOF
# Release notes
Inline code: \`rm -rf /\` must stay literal.
Command sub attempt: \$(touch $SENTINEL)
Backtick cmd attempt: \`touch $SENTINEL\`
Dollars: \$HOME \${PATH} \$5.00 and 100% done
Quotes: "double" and 'single' and \`mixed\`
Trailing pipe-ish: foo | bar && baz ; qux
EOF
BODY="$(cat "$BODY_FILE")"
# Mock tea: resolve a mosaicstack login, then capture the --description verbatim.
cat > "$BIN_DIR/tea" <<'SH'
#!/usr/bin/env bash
set -euo pipefail
if [[ "$*" == "login list --output json" ]]; then
cat <<'JSON'
[
{"name":"mosaicstack","url":"https://git.mosaicstack.dev","user":"ci-bot"}
]
JSON
exit 0
fi
if [[ "${1:-}" == "api" ]]; then
printf '%s\n' '{"login":"ci-bot"}'
exit 0
fi
if [[ "${1:-}" == "issue" && "${2:-}" == "create" ]]; then
desc=""
while [[ $# -gt 0 ]]; do
case "$1" in
--description) desc="$2"; shift 2 ;;
*) shift ;;
esac
done
printf '%s' "$desc" > "$MOSAIC_TEST_RECEIVED"
echo "#1 created"
exit 0
fi
exit 0
SH
chmod +x "$BIN_DIR/tea"
(
cd "$REPO_DIR"
PATH="$BIN_DIR:$PATH" \
MOSAIC_TEST_RECEIVED="$RECEIVED_FILE" \
"$SCRIPT_DIR/issue-create.sh" -t "Body safety test" -b "$BODY"
) >/dev/null
# 1. No command substitution executed anywhere in the pipeline.
if [[ -e "$SENTINEL" ]]; then
echo "FAIL: injected command substitution executed (sentinel file created): $SENTINEL" >&2
exit 1
fi
# 2. tea actually received the body (issue create path taken, not silently dropped).
if [[ ! -f "$RECEIVED_FILE" ]]; then
echo "FAIL: tea issue create was never invoked with a --description" >&2
exit 1
fi
# 3. The description tea received is byte-for-byte the original body.
if [[ "$(cat "$RECEIVED_FILE")" != "$BODY" ]]; then
echo "FAIL: body was not preserved verbatim through issue-create.sh" >&2
echo "--- expected ---" >&2; printf '%s\n' "$BODY" >&2
echo "--- received ---" >&2; cat "$RECEIVED_FILE" >&2
exit 1
fi
echo "issue-create.sh Markdown body-safety regression harness passed"