Had to also bump ubuntu version 18.04->20.04,
as was getting errors running the self-compiled pyinstaller otherwise (weird...):
```
from .utils.git import get_repo_revision
ModuleNotFoundError: No module named 'PyInstaller.utils'
```
(similar to https://github.com/pyinstaller/pyinstaller/issues/4403 )
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Note re appimage: when trying to compile python 3.8.x on ubuntu 16.04, I am getting:
./Modules/posixmodule.c: In function ‘os_copy_file_range_impl’:
./Modules/posixmodule.c:10351:15: error: implicit declaration of function ‘copy_file_range’ [-Werror=implicit-function-declaration]
ret = copy_file_range(src, p_offset_src, dst, p_offset_dst, count, flags);
This is because ubuntu 16.04 has too old glibc.
If there is a collision between a branch name and a commit hash, git
will choose the branch, even if the full 40-hex-long commit hash is
given. GitHub disallows branches/tags with such a name but git itself
does not. By adding the `^{commit}` syntax sugar after a ref name,
we can tell git that we want the commit hash to be preferred,
and hence we don't need to trust GitHub (only git).
see https://security.stackexchange.com/questions/225411/
the one in apt refused to install certain package versions (that were pinned by hash!!)
and installed different versions instead... e.g.:
Collecting wheel==0.34.2 (from -r /opt/electrum/contrib/build-linux/sdist/../../../contrib/deterministic-build/requirements.txt (line 112))
Downloading 521c6dc7feb90b06dc1d0b805b51ae/wheel-0.34.2.tar.gz (58kB)
100% |████████████████████████████████| 61kB 3.8MB/s
Requested wheel==0.34.2 from 521c6dc7feb90b06dc1d0b805b51ae/wheel-0.34.2.tar.gz#sha256=8788e9155fe14f54164c1b9eb0a319d98ef02c160725587ad60f14ddc57b6f96 (from -r /opt/electrum/contrib/build-linux/sdist/../../../contrib/deterministic-build/requirements.txt (line 112)), but installing version 0.30.0
All (incl indirect) dependencies are already listed in deterministic-build/requirements*.txt.
This option makes it easier to manually rm a dependency from that list for e.g. testing.
Slightly reduces file size, improves build speed and makes build more
reproducible.
The .comment section contained GCC version information which could cause
different build output from just a minor update in GCC. The information is not
needed so we strip this.
The strip command was invoked using xargs, spawning a new process for each file.
This is inefficient as xargs can correctly run the strip command with multiple
file names.
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taken from 43aaf9572f
SomberNight
gruve-p
ThomasV
Jin Eguchi
Axel Gembe