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eval: Add s flag, use p_fs by default, error out on unknown flag

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This commit is contained in:
ZyX 2017-04-03 02:11:27 +03:00
parent 5dcf280445
commit 97a7f4745d
3 changed files with 27 additions and 13 deletions
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9
runtime/doc/eval.txt
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@ -7916,10 +7916,11 @@ writefile({list}, {fname} [, {flags}])
:call writefile(["foo"], "event.log", "a")
:call writefile(["bar"], "event.log", "a")
<
When {flags} contains "S" fsync() call is not used. This means
that writefile() will finish faster, but writes may be left in
OS buffers and not yet written to disk. Such changes will
disappear if system crashes before OS does writing.
When {flags} contains "S" fsync() call is not used, with "s"
it is used, 'fsync' option applies by default. No fsync()
means that writefile() will finish faster, but writes may be
left in OS buffers and not yet written to disk. Such changes
will disappear if system crashes before OS does writing.
All NL characters are replaced with a NUL character.
Inserting CR characters needs to be done before passing {list}

22
src/nvim/eval.c
View File

@ -17421,20 +17421,24 @@ static void f_writefile(typval_T *argvars, typval_T *rettv, FunPtr fptr)
bool binary = false;
bool append = false;
bool do_fsync = true;
bool do_fsync = !!p_fs;
if (argvars[2].v_type != VAR_UNKNOWN) {
const char *const flags = tv_get_string_chk(&argvars[2]);
if (flags == NULL) {
return;
}
if (strchr(flags, 'b')) {
binary = true;
}
if (strchr(flags, 'a')) {
append = true;
}
if (strchr(flags, 'S')) {
do_fsync = false;
for (const char *p = flags; *p; p++) {
switch (*p) {
case 'b': { binary = true; break; }
case 'a': { append = true; break; }
case 's': { do_fsync = true; break; }
case 'S': { do_fsync = false; break; }
default: {
// Using %s, p and not %c, *p to preserve multibyte characters
emsgf(_("E5060: Unknown flag: %s"), p);
return;
}
}
}
}

9
test/functional/eval/writefile_spec.lua
View File

@ -80,6 +80,13 @@ describe('writefile()', function()
eq('a\0\0\0b', read_file(fname))
end)
it('writes with s and S', function()
eq(0, funcs.writefile({'\na\nb\n'}, fname, 'bs'))
eq('\0a\0b\0', read_file(fname))
eq(0, funcs.writefile({'a\n\n\nb'}, fname, 'bS'))
eq('a\0\0\0b', read_file(fname))
end)
it('correctly overwrites file', function()
eq(0, funcs.writefile({'\na\nb\n'}, fname, 'b'))
eq('\0a\0b\0', read_file(fname))
@ -115,6 +122,8 @@ describe('writefile()', function()
eq('\nE729: using Funcref as a String',
redir_exec(('call writefile(%s)'):format(args:format('function("tr")'))))
end
eq('\nE5060: Unknown flag: «»',
redir_exec(('call writefile([], "%s", "bs«»")'):format(fname)))
eq('TEST', read_file(fname))
end)