[BUG] gpg.program: '~' not expanded to home directory

From: Ross MacArthur <ross@macarthur.io>
Date: Jul 11, 2025, 15:04 UTC
Message-ID: <CAF1X4d7N1xdZt9JkVZytbEU1=7q3X_F_nqm4EG82B8-cVa7g8Q@mail.gmail.com>

`gpg.program` treats a leading ‘~’ literally, unlike other path options such as `core.excludesfile`.

Error:

    fatal: cannot exec '~/.local/bin/mygpg': No such file or directory

Reproducer:

    ln -s "$(command -v gpg)" ~/.local/bin/mygpg
    git config gpg.program '~/.local/bin/mygpg'
    git commit -S -m "test"   # fails as above

Expected: Git should expand ‘~’ to $HOME.
Work-around: have to use an absolute path