Question

Part of my software build process includes getting the hash of the working directory parent into a C++ string for inclusion in the “version” output. This is done by using hg identify -i to get the global revision id, and copying this output into a .h file for inclusion. I do this in a Windows batch file:

setlocal enabledelayedexpansion
for /f "tokens=1 delims=;=" %%a in ('hg identify -i') do (
  echo const std::string revision^(_T^("%%a"^)^); > rev.h
)

Which will output something like this into the file:

const std::string revision(_T("3b746fd492c6"));

If the working directory has any uncommitted changes, the hash has a + appended, making the string "3b746fd492c6+". This allows me to easily check whether the version of software I have built is controlled or not – if the string includes a + then the software is not reproducible from the repository.

However, hg identify adds a + to denote uncommitted changes, but it does not recognised untracked files. If I commit all changes but forget to add that all-important “do stuff” class, hg identify will not indicate this.

So my question is: how can I get the required functionality?
How can I simulate hg identify recognising new and removed files?

Ideally I would like to not have to use extensions, but will consider them as an option.

---

Update

Following on from Oben Sonne’s suggestion of using a combination of hg st and hg id -r . I have come up with the following batch file which produces quite a nice result:

@echo off
set REPOMODS=
for /F %%a IN ('hg st -n') DO set REPOMODS=+

for /f "tokens=1 delims=;=" %%a in ('hg identify -i -r .') do (
  echo const std::string revision^(_T^("%%a%REPOMODS%"^)^); > rev.h
)

%REPOMODS% is empty unless there is anything in the output of the hg st, in which case it is +. I’ve done a few tests and it seems to work.

Is there another solution which requires less faffing in batch files? Or is this the best I’ll get?

Answer 1

How about simply checking if the output of hg st is empty? If not, add a + yourself to the version (if not already given by hg id).

UPDATE: To prevent the double + issue, you could run hg id -r ., which never gives you a trailing +.