Solidity compiler command-line utility (solcjs) various problems

Question

I am trying to compile a file using solcjs from a command-line, and running into various problems.

First of all, I need to supply in the command-line all the files that are imported by the primary file.

Otherwise I get ParserError: Source "SomeFile.sol" not found: File not supplied initially.

But when I do supply these files, I get a bunch of other problems.

The main issue seems to be the fact the one of the imported files resides in a sub-folder.

First I noticed that I cannot use a backslash, i.e., can only use a slash (I should emphasize that I am running on Windows).

So I've fixed that.

Then I noticed that I cannot use a relative path, i.e., must use the full path of the file.

So I've fixed that too.

I was able to detect and solve these problems by attempting to compile that specific file by itself.

Now back to my original goal - once I specify this file in the list of files passed to solcjs, I keep getting that File not supplied initially error.

Here is the command line that I am using:

solcjs --optimize --bin --abi -o build C:/project/util/file1.sol file2.sol main.sol

When I compile each one of the imported files separately, I get abi and bin files inside the build output directory:

solcjs --optimize --bin --abi -o build C:/project/util/file1.sol
solcjs --optimize --bin --abi -o build file2.sol

But no matter what I do, I am unable to compile the main file.

Compiler version is 0.4.15+commit.bbb8e64f.Emscripten.clang.

Thank you.

Answer 1

If you are not trying to compile files on the terminal only and can use javascript to do that then this script might help you which I wrote sometime back. I also had multiple dependent contract files which were required to compile the main contract. So I solved using following way -

Define all dependent contracts in an input object keeping the same import order and then use that object to compile your contract.

var input = {
    'strings.sol': fs.readFileSync('strings.sol', 'utf8'),
    'StringLib.sol': fs.readFileSync('StringLib.sol', 'utf8'),
    'Killable.sol': fs.readFileSync('Killable.sol', 'utf8'),
    'Ownable.sol': fs.readFileSync('Ownable.sol', 'utf8'),
    'LMS.sol': fs.readFileSync('LMS.sol', 'utf8')
};
let compiledContract = solc.compile({sources: input}, 1);

Hope this helps.

Note: This requires basic nodejs knowledge.