…directory set in `$TERMUX_PKG_SRCURL` if its in the format `file:///path/to/source/dir`

The `/path/to/source/dir` must be an absolute and normalized path to a source directory on the local file system.

Whatever was the current state of the local source directory when build was started, that is what will be built, without any changes to any `git` branches/tags. Any uncommitted changes to current `git` branch will also get built. No checksum checks like one set in `$TERMUX_PKG_SHA256` will be done, and a tar for source directory will be created every time package is built, assuming `-f` flags are passed for rebuilds.

The `termux_download()` function has been copied from `master` branch, check it for history of contributions.

…it could be a different path than `/data` that is critical for build host like Termux docker

Either delete entire `TERMUX_APP__DATA_DIR` if `TERMUX__PREFIX` directory exists under it, or only delete `TERMUX__PREFIX` directory itself if it exists outside it.

…ermux_step_elf_cleaner` for packages to hook into

Packages may not want specific elf files to be stripped, like for debug `-g` test binaries, or may have elf files under different non-standard directories.

…function to file and provide `termux_step_create_debscripts__copy_from_dir()` for packages to copy debscripts from a custom directory into the current `DEBIAN` working directory

For example:

```shell
termux_step_create_debscripts() {
	termux_step_create_debscripts__copy_from_dir "$TERMUX_PKG_SRCDIR/build/output/packaging/debian" .
}
```

…when running `xargs` on Android `5`

Related pull termux/termux-exec-package#24

…r if `argv[0]` length is `>= 128` on Android `< 6` instead of letting process fail post execve() without an error

Related commit termux/termux-exec-package@3d7eecac

%ci:no-build

…chy under `/tmp` so that `TERMUX_PKGS__BUILD__REPO_ROOT_DIR` validation does not fail in `properties.sh` file

The `TERMUX_PKGS__BUILD__REPO_ROOT_DIR` validation checks if `scripts/properties.sh` file exists, which wouldn't exist under `scripts` directory if proper hierarchy is not created under `/tmp` directory.

Reworked variant of #4753.

Copied from 99236ea commit in `master` branch.

…ath for setting ownership of `TERMUX__PREFIX` and create `TERMUX_APP__DATA_DIR` as well in case `TERMUX__PREFIX` is not under it

Ownership of `TERMUX__PREFIX` must be fixed before `TERMUX_APP__DATA_DIR` if its under it, otherwise `TERMUX__ROOTFS` will not have its ownership fixed and following error would occur during package dependency extraction.

`tar: data/data/com.termux/files: Cannot change mode to rwxr-xr-x: Operation not permitted`

… `termux-exec` package version `>= 2.0.0` in `login` script

…kage in `master` branch

https://github.com/termux/termux-tools/commits/0f28caca/scripts/termux-info.in