stack/packages/mosaic/framework/tools/git/detect-platform.sh

#!/bin/bash
# detect-platform.sh - Detect git platform (Gitea or GitHub) for current repo
# Usage: source detect-platform.sh && detect_platform
#        or: ./detect-platform.sh (prints platform name)

detect_platform() {
    local remote_url
    remote_url=$(git remote get-url origin 2>/dev/null)

    if [[ -z "$remote_url" ]]; then
        echo "error: not a git repository or no origin remote" >&2
        return 1
    fi

    # Check for GitHub
    if [[ "$remote_url" == *"github.com"* ]]; then
        PLATFORM="github"
        export PLATFORM
        echo "github"
        return 0
    fi

    # Check for common Gitea indicators
    # Gitea URLs typically don't contain github.com, gitlab.com, bitbucket.org
    if [[ "$remote_url" != *"gitlab.com"* ]] && \
       [[ "$remote_url" != *"bitbucket.org"* ]]; then
        # Assume Gitea for self-hosted repos
        PLATFORM="gitea"
        export PLATFORM
        echo "gitea"
        return 0
    fi

    PLATFORM="unknown"
    export PLATFORM
    echo "unknown"
    return 1
}

get_repo_info() {
    local remote_url
    remote_url=$(git remote get-url origin 2>/dev/null)

    if [[ -z "$remote_url" ]]; then
        echo "error: not a git repository or no origin remote" >&2
        return 1
    fi

    # Extract owner/repo from URL
    # Handles: git@host:owner/repo.git, https://host/owner/repo.git, https://host/owner/repo
    local repo_path
    if [[ "$remote_url" == git@* ]]; then
        repo_path="${remote_url#*:}"
    else
        repo_path="${remote_url#*://}"
        repo_path="${repo_path#*/}"
    fi

    # Remove .git suffix if present
    repo_path="${repo_path%.git}"

    echo "$repo_path"
}

get_repo_owner() {
    local repo_info
    repo_info=$(get_repo_info)
    echo "${repo_info%%/*}"
}

get_repo_name() {
    local repo_info
    repo_info=$(get_repo_info)
    echo "${repo_info##*/}"
}

get_repo_slug() {
    get_repo_info
}

gitea_url_matches_host() {
    local url="${1:-}" host="${2:-}"
    [[ -n "$url" && -n "$host" ]] || return 1
    python3 - "$url" "$host" <<'PY'
import sys
from urllib.parse import urlparse

url, remote_host = sys.argv[1:]
configured = urlparse(url)
remote = urlparse(f"//{remote_host}")
if configured.scheme not in {"http", "https"} or configured.hostname != remote.hostname:
    raise SystemExit(1)

# Normalize by scheme: an implicit (portless) HTTP(S) URL and its explicit
# default-port form (":80" for http, ":443" for https) name the same
# provider endpoint. Apply that equivalence symmetrically -- whichever side
# omits the port is treated as carrying the scheme's default port -- so
# "configured implicit vs. remote explicit" and "configured explicit vs.
# remote implicit" both match. (The remote side here is always an HTTP(S)
# authority; an SSH remote's transport port is stripped by get_remote_host
# before reaching this comparison, since it identifies an unrelated
# service on the same host, not the HTTP(S) provider port.)
default_port = 80 if configured.scheme == "http" else 443
normalized_configured = configured.port if configured.port is not None else default_port
normalized_remote = remote.port if remote.port is not None else default_port
if normalized_configured != normalized_remote:
    raise SystemExit(1)
raise SystemExit(0)
PY
}

get_gitea_service_for_host() {
    local host="$1"
    local cred_file="${MOSAIC_CREDENTIALS_FILE:-}"
    if [[ -z "$cred_file" ]]; then
        # Same resolution chain as _lib/credentials.sh: profile HOME, then
        # host-level /etc only if it exists; neither existing keeps the
        # $HOME default (matches the lib's final := fallback).
        cred_file="$HOME/.config/mosaic/credentials.json"
        if [[ ! -f "$cred_file" && -f /etc/mosaic/credentials.json ]]; then
            cred_file="/etc/mosaic/credentials.json"
        fi
    fi

    case "$host" in
        git.mosaicstack.dev)
            echo "mosaicstack"
            return 0
            ;;
        git.uscllc.com)
            echo "usc"
            return 0
            ;;
    esac

    [[ -f "$cred_file" ]] || return 1
    command -v jq >/dev/null 2>&1 || return 1

    jq -r --arg host "$host" '
        .gitea // {}
        | to_entries[]
        | select((.value.url // "" | sub("/+$"; "")) | test("https?://" + $host + "$"))
        | .key
    ' "$cred_file" | head -n 1
}

find_tea_login_for_host() {
    local host="$1"
    local logins_json

    command -v tea >/dev/null 2>&1 || return 1
    logins_json=$(tea login list --output json 2>/dev/null) || return 1
    TEA_LOGINS_JSON="$logins_json" python3 - "$host" <<'PY'
import json
import os
import sys
from urllib.parse import urlparse

host = sys.argv[1]
try:
    logins = json.loads(os.environ.get("TEA_LOGINS_JSON", "[]"))
except Exception:
    raise SystemExit(1)

for login in logins if isinstance(logins, list) else []:
    url = str(login.get("url") or login.get("URL") or "")
    name = str(login.get("name") or login.get("Name") or "")
    parsed = urlparse(url)
    if parsed.hostname == host and name:
        print(name)
        raise SystemExit(0)

raise SystemExit(1)
PY
}

tea_login_matches_host() {
    local login_name="$1" host="$2"
    local logins_json

    command -v tea >/dev/null 2>&1 || return 1
    logins_json=$(tea login list --output json 2>/dev/null) || return 1
    TEA_LOGINS_JSON="$logins_json" python3 - "$login_name" "$host" <<'PY'
import json
import os
import sys
from urllib.parse import urlparse

login_name, host = sys.argv[1], sys.argv[2]
try:
    logins = json.loads(os.environ.get("TEA_LOGINS_JSON", "[]"))
except Exception:
    raise SystemExit(1)

for login in logins if isinstance(logins, list) else []:
    url = str(login.get("url") or login.get("URL") or "")
    name = str(login.get("name") or login.get("Name") or "")
    parsed = urlparse(url)
    if name == login_name and parsed.hostname == host:
        raise SystemExit(0)

raise SystemExit(1)
PY
}

# Emit an actionable diagnostic to stderr when no tea login resolves for a host.
# Callers that have a working API fallback may ignore the non-zero return of
# get_gitea_login_for_host; this turns the previously SILENT failure into a loud,
# greppable hint (available logins + override + add-login instructions). Printed to
# stderr only, so it never contaminates stdout (the resolved login name) or log
# assertions that capture tea/curl invocations.
print_gitea_login_diagnostic() {
    local host="${1:-<unknown>}"
    local available
    available=$(
        command -v tea >/dev/null 2>&1 || { echo "(tea CLI not installed)"; exit 0; }
        logins_json=$(tea login list --output json 2>/dev/null) || { echo "(could not query tea login list)"; exit 0; }
        TEA_LOGINS_JSON="$logins_json" python3 - <<'PY'
import json, os
from urllib.parse import urlparse
try:
    logins = json.loads(os.environ.get("TEA_LOGINS_JSON", "[]"))
except Exception:
    logins = []
rows = []
for login in logins if isinstance(logins, list) else []:
    name = str(login.get("name") or login.get("Name") or "")
    url = str(login.get("url") or login.get("URL") or "")
    host = urlparse(url).hostname or "?"
    if name:
        rows.append(f"{name} (host: {host})")
print("; ".join(rows) if rows else "(none configured)")
PY
    )
    {
        echo "Error: no Gitea tea login matches host '$host'."
        echo "  Available tea logins: ${available}"
        echo "  Fix: set GITEA_LOGIN to a login whose URL host is '$host',"
        echo "       or add one: tea login add --name <name> --url https://$host --token <token>"
    } >&2
}

get_gitea_login_for_host() {
    local host="${1:-}"
    local login

    if [[ -z "$host" ]]; then
        host=$(get_remote_host) || return 1
    fi

    if [[ -n "${GITEA_LOGIN:-}" ]]; then
        if tea_login_matches_host "$GITEA_LOGIN" "$host"; then
            echo "$GITEA_LOGIN"
            return 0
        fi
    fi

    login=$(find_tea_login_for_host "$host" || true)
    if [[ -n "$login" ]]; then
        echo "$login"
        return 0
    fi

    print_gitea_login_diagnostic "$host"
    return 1
}

# Validate the current authenticated Gitea user for a resolved Tea login.
# Tea stores a user name with each login which can become stale after user rename,
# token rotation, or server migration. Querying /user derives the identity from the
# active credential instead of trusting that saved name. Callers fall back to the
# host-scoped API path when this validation fails.
get_gitea_authenticated_user() {
    local login_name="$1" response

    command -v tea >/dev/null 2>&1 || return 1
    response=$(tea api --login "$login_name" /user 2>/dev/null) || return 1
    TEA_AUTHENTICATED_USER_JSON="$response" python3 - <<'PY'
import json
import os

try:
    user = json.loads(os.environ["TEA_AUTHENTICATED_USER_JSON"])
except (KeyError, json.JSONDecodeError):
    raise SystemExit(1)

login = user.get("login") if isinstance(user, dict) else None
if isinstance(login, str) and login:
    print(login)
    raise SystemExit(0)
raise SystemExit(1)
PY
}

get_default_tea_login() {
    local logins_json

    command -v tea >/dev/null 2>&1 || return 1
    logins_json=$(tea login list --output json 2>/dev/null) || return 1
    TEA_LOGINS_JSON="$logins_json" python3 - <<'PY'
import json
import os

try:
    logins = json.loads(os.environ.get("TEA_LOGINS_JSON", "[]"))
except Exception:
    raise SystemExit(1)

if not isinstance(logins, list) or not logins:
    raise SystemExit(1)

for login in logins:
    if not isinstance(login, dict):
        continue
    is_default = str(login.get("default") or login.get("Default") or "").lower()
    name = str(login.get("name") or login.get("Name") or "")
    if name and is_default == "true":
        print(name)
        raise SystemExit(0)

for login in logins:
    if not isinstance(login, dict):
        continue
    name = str(login.get("name") or login.get("Name") or "")
    if name:
        print(name)
        raise SystemExit(0)

raise SystemExit(1)
PY
}

get_gitea_login_for_repo_override() {
    local login

    if [[ -n "${GITEA_LOGIN:-}" ]]; then
        echo "$GITEA_LOGIN"
        return 0
    fi

    login=$(get_default_tea_login || true)
    if [[ -n "$login" ]]; then
        echo "$login"
        return 0
    fi

    return 1
}

get_host_from_url() {
    local url="${1:-}"
    [[ -n "$url" ]] || return 1

    python3 - "$url" <<'PY'
import sys
from urllib.parse import urlparse

parsed = urlparse(sys.argv[1])
if parsed.hostname:
    print(parsed.hostname)
    raise SystemExit(0)
raise SystemExit(1)
PY
}

get_gitea_api_host_for_repo_override() {
    if [[ -n "${GITEA_HOST:-}" ]]; then
        echo "$GITEA_HOST"
        return 0
    fi

    get_host_from_url "${GITEA_URL:-}"
}

# Resolve owner/repo relative to a configured Gitea base URL. HTTP(S) clone
# URLs can include the deployment prefix (for example /gitea/owner/repo.git),
# but Gitea's /repos API expects only owner/repo. Root-mounted and SSH clone
# forms retain their existing owner/repo behavior.
get_gitea_repo_slug_for_url() {
    local configured_url="$1" remote_url
    remote_url=$(git remote get-url origin 2>/dev/null) || return 1

    if [[ "$remote_url" =~ ^https?:// ]]; then
        python3 - "$remote_url" "$configured_url" <<'PY'
import sys
from urllib.parse import urlparse

remote = urlparse(sys.argv[1])
base = urlparse(sys.argv[2])
remote_path = remote.path.strip("/")
if remote_path.endswith(".git"):
    remote_path = remote_path[:-4]
base_path = base.path.strip("/")
remote_parts = [part for part in remote_path.split("/") if part]
base_parts = [part for part in base_path.split("/") if part]

if base_parts and remote_parts[:len(base_parts)] == base_parts:
    repo_parts = remote_parts[len(base_parts):]
elif len(remote_parts) == 2:
    # Preserve a root-shaped clone URL when provider API configuration carries
    # a reverse-proxy prefix separately.
    repo_parts = remote_parts
else:
    raise SystemExit(1)

if len(repo_parts) != 2:
    raise SystemExit(1)
print("/".join(repo_parts))
PY
        return
    fi

    get_repo_slug
}

get_gitea_repo_args() {
    local repo host login
    repo=$(get_repo_slug) || return 1
    host=$(get_remote_host) || return 1
    login=$(get_gitea_login_for_host "$host") || return 1
    printf -- '--repo %q --login %q' "$repo" "$login"
}

get_gitea_login() {
    get_gitea_login_for_host "$(get_remote_host)"
}

get_remote_host() {
    local remote_url
    remote_url=$(git remote get-url origin 2>/dev/null || true)
    if [[ -z "$remote_url" ]]; then
        return 1
    fi
    if [[ "$remote_url" =~ ^https?://([^/]+)/ ]]; then
        local host="${BASH_REMATCH[1]}"
        echo "${host##*@}"
        return 0
    fi
    if [[ "$remote_url" =~ ^ssh://([^/]+)/ ]]; then
        local host="${BASH_REMATCH[1]}"
        host="${host##*@}"
        # Strip an SSH transport port (e.g. "git.example:2222"): it names the
        # SSH daemon port, not the HTTP(S) provider API port, and must not
        # feed gitea_url_matches_host's port comparison (#850).
        echo "${host%%:*}"
        return 0
    fi
    if [[ "$remote_url" =~ ^git@([^:]+): ]]; then
        echo "${BASH_REMATCH[1]}"
        return 0
    fi
    return 1
}

# Resolve the configured Gitea base URL for a host from the same credential
# source used by get_gitea_token. The scheme and any deployment path prefix are
# provider configuration and must not be reconstructed from the git remote.
get_gitea_url_for_host() {
    local host="$1" script_dir cred_loader url
    script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
    cred_loader="$script_dir/../_lib/credentials.sh"

    if [[ -f "$cred_loader" ]]; then
        url=$(
            # shellcheck source=/dev/null
            source "$cred_loader"
            unset GITEA_TOKEN GITEA_URL
            case "$host" in
                git.mosaicstack.dev) load_credentials gitea-mosaicstack 2>/dev/null ;;
                git.uscllc.com)      load_credentials gitea-usc 2>/dev/null ;;
                *)
                    for svc in gitea-mosaicstack gitea-usc; do
                        unset GITEA_TOKEN GITEA_URL
                        load_credentials "$svc" 2>/dev/null || continue
                        if gitea_url_matches_host "${GITEA_URL:-}" "$host"; then
                            break
                        fi
                        unset GITEA_TOKEN GITEA_URL
                    done
                    ;;
            esac
            if gitea_url_matches_host "${GITEA_URL:-}" "$host"; then
                printf '%s' "${GITEA_URL%/}"
            fi
        )
        if [[ -n "$url" ]]; then
            printf '%s\n' "$url"
            return 0
        fi
    fi

    if gitea_url_matches_host "${GITEA_URL:-}" "$host"; then
        printf '%s\n' "${GITEA_URL%/}"
        return 0
    fi

    return 1
}

# Resolve a Gitea API token for the given host.
# Priority: Mosaic credential loader → GITEA_TOKEN env → ~/.git-credentials
get_gitea_token() {
    local host="$1"
    local script_dir
    script_dir="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
    local cred_loader="$script_dir/../_lib/credentials.sh"

    # 1. Mosaic credential loader (host → service mapping, run in subshell to avoid polluting env)
    if [[ -f "$cred_loader" ]]; then
        local token
        token=$(
            # shellcheck source=/dev/null
            source "$cred_loader"
            # Host-specific wrapper resolution must not inherit caller/global GITEA_*.
            # load_credentials intentionally preserves existing env vars for interactive use,
            # but metadata/merge wrappers need credentials matching the remote host.
            unset GITEA_TOKEN GITEA_URL
            case "$host" in
                git.mosaicstack.dev) load_credentials gitea-mosaicstack 2>/dev/null ;;
                git.uscllc.com)      load_credentials gitea-usc 2>/dev/null ;;
                *)
                    local matched=false
                    for svc in gitea-mosaicstack gitea-usc; do
                        unset GITEA_TOKEN GITEA_URL
                        load_credentials "$svc" 2>/dev/null || continue
                        if gitea_url_matches_host "${GITEA_URL:-}" "$host"; then
                            matched=true
                            break
                        fi
                    done
                    if [[ "$matched" != true ]]; then
                        unset GITEA_TOKEN GITEA_URL
                    fi
                    ;;
            esac
            echo "${GITEA_TOKEN:-}"
        )
        if [[ -n "$token" ]]; then
            echo "$token"
            return 0
        fi
    fi

    # 2. GITEA_TOKEN env var (only when GITEA_URL, if present, matches the remote host)
    if [[ -n "${GITEA_TOKEN:-}" ]]; then
        if [[ -z "${GITEA_URL:-}" ]] || gitea_url_matches_host "$GITEA_URL" "$host"; then
            echo "$GITEA_TOKEN"
            return 0
        fi
    fi

    # 3. ~/.git-credentials file
    local creds="$HOME/.git-credentials"
    if [[ -f "$creds" ]]; then
        local token
        token=$(grep -F "$host" "$creds" 2>/dev/null | sed -n 's#https\?://[^@]*:\([^@/]*\)@.*#\1#p' | head -n 1)
        if [[ -n "$token" ]]; then
            echo "$token"
            return 0
        fi
    fi

    return 1
}

# Resolve the API token for a SPECIFIC tea login name from tea's own config
# (the same store tea itself writes/reads for `--login <name>`). This is what
# lets a REST write be performed AS the selected --login identity: tea keys its
# per-login tokens by `name` in $XDG_CONFIG_HOME/tea/config.yml (default
# ~/.config/tea/config.yml), exactly as the `tea` CLI resolves them, so a
# --login override and its REST read-back bind to the SAME credential/identity.
#
# $2 (repo host) binds the selected credential to the TARGET host: a tea login
# also records the `url` it authenticates against, and the matched login's URL
# host MUST equal the repo host. This fails closed when an override login is
# configured for a DIFFERENT host than the repo remote, so a login name shared
# across hosts (or a mistargeted override) can never send one host's credential
# to another host (cross-host credential leak). When $2 is empty the host bind
# is skipped (host-agnostic lookup) — callers that write should always pass it.
#
# Prints the token on success; returns non-zero (no output) if the config, a
# matching login token, or the host bind cannot be satisfied. Callers must not
# log the result.
get_gitea_token_for_login() {
    local login_name="$1" repo_host="${2:-}" config_file
    [[ -n "$login_name" ]] || return 1
    config_file="${XDG_CONFIG_HOME:-$HOME/.config}/tea/config.yml"
    [[ -f "$config_file" ]] || return 1

    LOGIN_NAME="$login_name" REPO_HOST="$repo_host" python3 - "$config_file" <<'PY'
import os
import re
import sys
from urllib.parse import urlparse

wanted = os.environ["LOGIN_NAME"]
repo_host = os.environ.get("REPO_HOST", "").strip().lower()
config_path = sys.argv[1]


def _strip_scalar(value):
    value = value.strip()
    if len(value) >= 2 and value[0] == value[-1] and value[0] in ("'", '"'):
        value = value[1:-1]
    return value


def _host_of(url):
    if not isinstance(url, str) or not url:
        return None
    parsed = urlparse(url if "//" in url else f"//{url}")
    host = parsed.hostname
    return host.lower() if host else None


def _accept(token, url):
    # Enforce the host bind before surfacing a token. When a repo host is given,
    # the login's recorded URL host must match it exactly; a login with no
    # usable URL (or a mismatched one) is rejected (fail closed) so a cross-host
    # credential is never emitted.
    if not isinstance(token, str) or not token:
        return None
    if repo_host:
        if _host_of(url) != repo_host:
            return None
    return token


def _token_via_pyyaml():
    # Preferred, fully general path when PyYAML is installed. Raises ImportError
    # (caught by the caller) when the module is unavailable so the environment
    # -robust fallback can take over instead of failing closed on every host
    # that lacks PyYAML.
    import yaml

    with open(config_path, encoding="utf-8") as handle:
        config = yaml.safe_load(handle)
    logins = config.get("logins") if isinstance(config, dict) else None
    if not isinstance(logins, list):
        return None
    for login in logins:
        if isinstance(login, dict) and str(login.get("name") or "") == wanted:
            return _accept(login.get("token"), login.get("url"))
    return None


def _token_via_lines():
    # Conservative fallback for hosts without PyYAML. tea writes config.yml in a
    # fixed, flat shape (a `logins:` list of maps with scalar name/url/token
    # fields), so a small indentation-aware scan resolves the SAME token PyYAML
    # would. It only ever returns the `token` of the entry whose `name` EXACTLY
    # equals the requested login AND whose url host matches the repo host, so it
    # cannot misattribute to another identity or host; anything it cannot parse
    # yields None (fail closed).
    with open(config_path, encoding="utf-8") as handle:
        lines = handle.read().splitlines()

    logins_indent = None
    start = len(lines)
    for index, line in enumerate(lines):
        match = re.match(r"^(\s*)logins\s*:\s*$", line)
        if match:
            logins_indent = len(match.group(1))
            start = index + 1
            break
    if logins_indent is None:
        return None

    entries = []
    current = None
    for line in lines[start:]:
        if not line.strip() or line.lstrip().startswith("#"):
            continue
        indent = len(line) - len(line.lstrip(" "))
        if indent <= logins_indent:
            break
        item = re.match(r"^\s*-\s*(.*)$", line)
        rest = item.group(1) if item else line
        if item:
            current = {}
            entries.append(current)
        pair = re.match(r"^([A-Za-z0-9_]+)\s*:\s*(.*)$", rest.strip())
        if pair and current is not None:
            current[pair.group(1)] = _strip_scalar(pair.group(2))

    for entry in entries:
        if str(entry.get("name") or "") == wanted:
            return _accept(entry.get("token"), entry.get("url"))
    return None


try:
    try:
        token = _token_via_pyyaml()
    except ImportError:
        token = _token_via_lines()
except Exception:
    raise SystemExit(1)

if isinstance(token, str) and token:
    print(token)
    raise SystemExit(0)
raise SystemExit(1)
PY
}

# Resolve HTTPS basic auth credentials for a Gitea host from ~/.git-credentials.
# Prints "username:password" for direct curl -u consumption. Callers must not log it.
get_gitea_basic_auth() {
    local host="$1"
    local creds="$HOME/.git-credentials"
    if [[ ! -f "$creds" ]]; then
        return 1
    fi

    python3 - "$host" "$creds" <<'PY'
import sys
from pathlib import Path
from urllib.parse import unquote, urlparse

host = sys.argv[1]
creds = Path(sys.argv[2])

for line in creds.read_text(encoding="utf-8").splitlines():
    parsed = urlparse(line.strip())
    if parsed.hostname != host:
        continue
    username = unquote(parsed.username or "")
    password = unquote(parsed.password or "")
    if username and password:
        print(f"{username}:{password}")
        raise SystemExit(0)

raise SystemExit(1)
PY
}

# If script is run directly (not sourced), output the platform
if [[ "${BASH_SOURCE[0]}" == "${0}" ]]; then
    detect_platform
fi