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Allow erasing in multiple scopes in one go

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This commit is contained in:
Mahmoud Al-Qudsi 2022-10-15 16:05:36 -05:00
parent fa932533f2
commit fed64999bc
1 changed files with 50 additions and 42 deletions
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92
src/builtins/set.cpp
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@ -204,11 +204,14 @@ static int validate_cmd_opts(const wchar_t *cmd, const set_cmd_opts_t &opts, int
return STATUS_INVALID_ARGS;
}
// Variables can only have one scope.
// Variables can only have one scope...
if (opts.local + opts.function + opts.global + opts.universal > 1) {
streams.err.append_format(BUILTIN_ERR_GLOCAL, cmd);
builtin_print_error_trailer(parser, streams.err, cmd);
return STATUS_INVALID_ARGS;
// ..unless we are erasing a variable, in which case we can erase from several in one go.
if (!opts.erase) {
streams.err.append_format(BUILTIN_ERR_GLOCAL, cmd);
builtin_print_error_trailer(parser, streams.err, cmd);
return STATUS_INVALID_ARGS;
}
}
// Variables can only have one export status.
@ -391,7 +394,7 @@ static maybe_t<split_var_t> split_var_and_indexes(const wchar_t *arg, env_mode_f
return res;
}
/// Given a list of values and 1-based indexes, return a new list, with those elements removed.
/// Given a list of values and 1-based indexes, return a new list with those elements removed.
/// Note this deliberately accepts both args by value, as it modifies them both.
static wcstring_list_t erased_at_indexes(wcstring_list_t input, std::vector<long> indexes) {
// Sort our indexes into *descending* order.
@ -620,45 +623,50 @@ static int builtin_set_show(const wchar_t *cmd, const set_cmd_opts_t &opts, int
static int builtin_set_erase(const wchar_t *cmd, set_cmd_opts_t &opts, int argc,
const wchar_t **argv, parser_t &parser, io_streams_t &streams) {
int ret = STATUS_CMD_OK;
env_mode_flags_t scope = compute_scope(opts);
for (int i = 0; i < argc; i++) {
auto split = split_var_and_indexes(argv[i], scope, parser.vars(), streams);
if (!split) {
builtin_print_error_trailer(parser, streams.err, cmd);
return STATUS_CMD_ERROR;
}
if (!valid_var_name(split->varname)) {
streams.err.append_format(BUILTIN_ERR_VARNAME, cmd, split->varname.c_str());
builtin_print_error_trailer(parser, streams.err, cmd);
return STATUS_INVALID_ARGS;
}
int retval = STATUS_CMD_OK;
if (split->indexes.empty()) { // unset the var
retval = parser.vars().remove(split->varname, scope);
// When a non-existent-variable is unset, return ENV_NOT_FOUND as $status
// but do not emit any errors at the console as a compromise between user
// friendliness and correctness.
if (retval != ENV_NOT_FOUND) {
handle_env_return(retval, cmd, split->varname, streams);
env_mode_flags_t scopes = compute_scope(opts);
// `set -e` is allowed to be called with multiple scopes.
for (int bit = 0; 1<<bit <= ENV_USER; ++bit) {
int scope = scopes & 1<<bit;
if (scope == 0 || (scope == ENV_USER && scopes != ENV_USER)) continue;
for (int i = 0; i < argc; i++) {
auto split = split_var_and_indexes(argv[i], scope, parser.vars(), streams);
if (!split) {
builtin_print_error_trailer(parser, streams.err, cmd);
return STATUS_CMD_ERROR;
}
if (retval == ENV_OK) {
event_fire(parser, event_t::variable_erase(split->varname));
}
} else { // remove just the specified indexes of the var
if (!split->var) return STATUS_CMD_ERROR;
wcstring_list_t result = erased_at_indexes(split->var->as_list(), split->indexes);
retval = env_set_reporting_errors(cmd, split->varname, scope, std::move(result),
streams, parser);
}
// Set $status to the last error value.
// This is cheesy, but I don't expect this to be checked often.
if (retval != STATUS_CMD_OK) {
ret = retval;
} else {
warn_if_uvar_shadows_global(cmd, opts, split->varname, streams, parser);
if (!valid_var_name(split->varname)) {
streams.err.append_format(BUILTIN_ERR_VARNAME, cmd, split->varname.c_str());
builtin_print_error_trailer(parser, streams.err, cmd);
return STATUS_INVALID_ARGS;
}
int retval = STATUS_CMD_OK;
if (split->indexes.empty()) { // unset the var
retval = parser.vars().remove(split->varname, scope);
// When a non-existent-variable is unset, return ENV_NOT_FOUND as $status
// but do not emit any errors at the console as a compromise between user
// friendliness and correctness.
if (retval != ENV_NOT_FOUND) {
handle_env_return(retval, cmd, split->varname, streams);
}
if (retval == ENV_OK) {
event_fire(parser, event_t::variable_erase(split->varname));
}
} else { // remove just the specified indexes of the var
if (!split->var) return STATUS_CMD_ERROR;
wcstring_list_t result = erased_at_indexes(split->var->as_list(), split->indexes);
retval = env_set_reporting_errors(cmd, split->varname, scope, std::move(result),
streams, parser);
}
// Set $status to the last error value.
// This is cheesy, but I don't expect this to be checked often.
if (retval != STATUS_CMD_OK) {
ret = retval;
} else {
warn_if_uvar_shadows_global(cmd, opts, split->varname, streams, parser);
}
}
}
return ret;