110 lines
5.2 KiB
Bash
Executable File
110 lines
5.2 KiB
Bash
Executable File
#!/bin/bash
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# git-credential-mosaic — git credential helper — resolves Gitea tokens from
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# the Mosaic credential store at runtime so remote URLs never embed secrets.
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#
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# Install (one-time, per clone or globally):
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# git config credential.helper "$HOME/.config/mosaic/tools/git/git-credential-mosaic"
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# # or, fleet-wide: git config --global credential.helper "$HOME/.config/mosaic/tools/git/git-credential-mosaic"
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#
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# Per-agent Gate-16 identity (author != reviewer separation):
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# git config mosaic.gitIdentity <agent-id> # per-worktree, persists on disk
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# # or: export MOSAIC_GIT_IDENTITY=<agent-id>
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#
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# Resolution priority: MOSAIC_GIT_IDENTITY env > git config mosaic.gitIdentity
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# (per-worktree, survives across non-persistent shells) > git-supplied username
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# (credential.username / URL). When the resolved identity has a matching
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# per-agent token file, use it instead of the shared account. Backward
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# compatible: nothing resolvable -> shared token (unchanged behavior).
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[ "$1" = "get" ] || exit 0
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host=""; username_in=""
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while IFS= read -r line; do
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[ -z "$line" ] && break
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case "$line" in
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host=*) host=${line#host=};;
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username=*) username_in=${line#username=};;
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esac
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done
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script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
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trace_resolution() {
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[ "${MOSAIC_CREDENTIAL_TRACE:-}" = 1 ] || return 0
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resolution_path="$1" reason="$2" trace_identity="$3" trace_host="$4" source="$5"
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shared_path_entered=false
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[ "$resolution_path" = shared ] && shared_path_entered=true
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printf 'MOSAIC_CREDENTIAL_RESOLUTION outcome=ok reason=%s identity=%s host=%s resolution_path=%s shared_path_entered=%s source=%s\n' \
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"$reason" "$trace_identity" "$trace_host" "$resolution_path" "$shared_path_entered" "$source" >&2
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}
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# Per-agent identity resolution (Gate-16 author≠reviewer separation).
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# Priority: MOSAIC_GIT_IDENTITY env > git config mosaic.gitIdentity (per-worktree,
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# survives across non-persistent shells) > git-supplied username (credential.username
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# / URL). When the resolved identity has a matching per-agent token, use it instead of
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# the shared account. Backward-compatible: nothing resolvable → shared token.
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ident="$MOSAIC_GIT_IDENTITY"
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[ -z "$ident" ] && ident=$(git config --get mosaic.gitIdentity 2>/dev/null)
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[ -z "$ident" ] && ident="$username_in"
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if [ -n "${MOSAIC_AGENT_NAME:-}" ] && [ -n "$ident" ] && [ "$ident" != "$MOSAIC_AGENT_NAME" ]; then
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echo "quit=true"
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printf 'MOSAIC_CREDENTIAL_REFUSAL outcome=refused reason=provider-identity-mismatch identity=%s fleet_identity=%s host=%s shared_path_entered=false source=git-credential-mosaic\n' \
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"$ident" "$MOSAIC_AGENT_NAME" "$host" >&2
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exit 1
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fi
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if [ -n "$ident" ]; then
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case "$host" in
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git.uscllc.com) idpfx=gitea-usc;;
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git.mosaicstack.dev) idpfx=gitea-mosaicstack;;
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*) idpfx="";;
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esac
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if [ -n "$idpfx" ]; then
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idtok="$HOME/.config/mosaic/secrets/gitea-tokens/${idpfx}-${ident}.token"
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idcred="$HOME/.config/mosaic/secrets/gitea-tokens/${idpfx}-${ident}.credential.json"
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if [ -r "$idcred" ]; then
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token=$(python3 "$script_dir/resolve-credential-envelope.py" \
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"$idcred" "$ident" "${MOSAIC_CREDENTIAL_ESTATE:-}" "$host") || exit 1
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trace_resolution identity credential-resolved "$ident" "$host" git-credential-mosaic
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echo "username=${ident}"
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echo "password=${token}"
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exit 0
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fi
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if [ -r "$idtok" ]; then
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trace_resolution identity credential-resolved "$ident" "$host" git-credential-mosaic
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echo "username=${ident}"
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echo "password=$(cat "$idtok")"
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exit 0
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fi
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if [ -n "${MOSAIC_AGENT_NAME:-}" ]; then
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echo "quit=true"
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printf 'MOSAIC_CREDENTIAL_REFUSAL outcome=refused reason=no-token-for-identity identity=%s host=%s shared_path_entered=false source=git-credential-mosaic path=%s\n' \
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"$ident" "$host" "$idtok" >&2
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exit 1
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fi
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fi
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fi
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if [ -n "${MOSAIC_AGENT_NAME:-}" ] && [ -z "$ident" ]; then
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case "$host" in
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git.uscllc.com|git.mosaicstack.dev)
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echo "quit=true"
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printf 'MOSAIC_CREDENTIAL_REFUSAL outcome=refused reason=identity-required identity=<unset> host=%s shared_path_entered=false source=git-credential-mosaic\n' "$host" >&2
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exit 1
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;;
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esac
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fi
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case "$host" in
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git.uscllc.com) svc=gitea-usc;;
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git.mosaicstack.dev) svc=gitea-mosaicstack;;
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*) exit 0;;
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esac
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# Script-relative (not $HOME-absolute) so this resolves correctly regardless
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# of where the framework installer places tools/ under $HOME — mirrors
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# detect-platform.sh's own cred_loader resolution in this same directory.
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# shellcheck source=../_lib/credentials.sh
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source "$script_dir/../_lib/credentials.sh"
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load_credentials "$svc" >/dev/null 2>&1 || exit 0
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trace_resolution shared shared-credential-resolved '<interactive-shared>' "$host" credentials-loader
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# GITEA_USER is not populated by load_credentials (it only exports
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# GITEA_URL/GITEA_TOKEN for gitea-*), so this fallback is normally taken. Gitea's
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# git-over-HTTP auth authenticates from the token itself (the password field),
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# not from the username string, so any non-empty placeholder works here — this
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# is deliberately NOT a real account name (framework files must stay
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# operator-agnostic; see tools/quality/scripts/verify-sanitized.sh).
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echo "username=${GITEA_USER:-git}"
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echo "password=$GITEA_TOKEN"
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