48 lines
1.8 KiB
Bash
48 lines
1.8 KiB
Bash
#shellcheck shell=sh
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# core: logging, error handling and command execution.
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#
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# Every myos command goes through myos_run, which honours DRYRUN by printing
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# the command instead of running it. Messages go to stderr so that stdout stays
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# usable for data (myos env, myos config, myos ls).
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# Exit codes and colors are consumed by the other lib/ files and by bin/myos.
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# shellcheck disable=SC2034
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MYOS_E_OK=0 # success
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MYOS_E_FAIL=1 # command failed
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MYOS_E_USAGE=2 # bad invocation
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MYOS_E_NOSTACK=3 # stack not found
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MYOS_E_NOREQ=4 # missing requirement
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myos_colors() {
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if [ -t 2 ] && [ "${TERM:-dumb}" != dumb ] && [ -z "${NO_COLOR:-}" ]; then
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MYOS_C_ERROR=$(printf '\033[31m'); MYOS_C_WARN=$(printf '\033[01;33m')
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MYOS_C_INFO=$(printf '\033[33m'); MYOS_C_DEBUG=$(printf '\033[01;34m')
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MYOS_C_VALUE=$(printf '\033[36m'); MYOS_C_RESET=$(printf '\033[0m')
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else
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MYOS_C_ERROR=; MYOS_C_WARN=; MYOS_C_INFO=; MYOS_C_DEBUG=; MYOS_C_VALUE=; MYOS_C_RESET=
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fi
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}
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myos_error() { printf '%sERROR:%s %s\n' "$MYOS_C_ERROR" "$MYOS_C_RESET" "$*" >&2; }
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myos_warning() { printf '%sWARNING:%s %s\n' "$MYOS_C_WARN" "$MYOS_C_RESET" "$*" >&2; }
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myos_info() { [ -n "${VERBOSE:-}" ] && printf '%s%s%s\n' "$MYOS_C_INFO" "$*" "$MYOS_C_RESET" >&2; return 0; }
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myos_debug() { [ -n "${DEBUG:-}" ] && printf '%s%s%s\n' "$MYOS_C_DEBUG" "$*" "$MYOS_C_RESET" >&2; return 0; }
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# myos_die CODE MESSAGE...
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myos_die() { _code=$1; shift; myos_error "$*"; exit "$_code"; }
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# myos_run CMD... run a command, or print it when DRYRUN is true
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myos_run() {
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if [ "${DRYRUN:-false}" = true ]; then
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printf '%s\n' "$*"
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return 0
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fi
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myos_debug "+ $*"
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"$@"
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}
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# myos_have CMD is a command available?
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myos_have() { command -v "$1" >/dev/null 2>&1; }
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myos_colors
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