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file: return errors for use in assertions

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This commit is contained in:
Lars Mueller 2022-01-08 13:32:12 +01:00
parent 9bfefb9283
commit 170b0393e1
1 changed files with 12 additions and 13 deletions
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25
file.lua
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@ -25,16 +25,16 @@ end
-- concat_path is set by init.lua to avoid code duplication -- concat_path is set by init.lua to avoid code duplication
function read(filename) function read(filename)
local file = io.open(filename, "r") local file, err = io.open(filename, "r")
if file == nil then return nil end if file == nil then return nil, err end
local content = file:read"*a" local content = file:read"*a"
file:close() file:close()
return content return content
end end
function write_unsafe(filename, new_content) function write_unsafe(filename, new_content)
local file = io.open(filename, "w") local file, err = io.open(filename, "w")
if file == nil then return false end if file == nil then return false, err end
file:write(new_content) file:write(new_content)
file:close() file:close()
return true return true
@ -42,9 +42,9 @@ end
write = minetest and minetest.safe_file_write or write_unsafe write = minetest and minetest.safe_file_write or write_unsafe
function write_binary(filename, new_content) function write_binary_unsafe(filename, new_content)
local file = io.open(filename, "wb") local file, err = io.open(filename, "wb")
if file == nil then return false end if file == nil then return false, err end
file:write(new_content) file:write(new_content)
file:close() file:close()
return true return true
@ -61,24 +61,23 @@ function ensure_content(filename, ensured_content)
end end
function append(filename, new_content) function append(filename, new_content)
local file = io.open(filename, "a") local file, err = io.open(filename, "a")
if file == nil then return false end if file == nil then return false, err end
file:write(new_content) file:write(new_content)
file:close() file:close()
return true return true
end end
function exists(filename) function exists(filename)
local file = io.open(filename, "r") local file, err = io.open(filename, "r")
if file == nil then return false end if file == nil then return false, err end
file:close() file:close()
return true return true
end end
function create_if_not_exists(filename, content) function create_if_not_exists(filename, content)
if not exists(filename) then if not exists(filename) then
write(filename, content or "") return write(filename, content or "")
return true
end end
return false return false
end end