Delete vendored code and update CI to Go 1.13 (#158)

As the Go community transitions to using the modules ecosystem,
we want to only support one way of managing dependencies.
So this change moves to only using Go modules for dependency management.

This means that our effective minimum Go version increases to Go 1.11.
To account for this, we also update:
  - the documentation
  - Makefile
  - CI scripts

1 files changed, 0 insertions, 122 deletions

diff --git a/vendor/github.com/urfave/cli/runtests b/vendor/github.com/urfave/cli/runtests
deleted file mode 100644
index ee22bde..0000000
--- a/vendor/github.com/urfave/cli/runtests
+++ /dev/null
@@ -1,122 +0,0 @@
-#!/usr/bin/env python
-from __future__ import print_function
-
-import argparse
-import os
-import sys
-import tempfile
-
-from subprocess import check_call, check_output
-
-
-PACKAGE_NAME = os.environ.get(
-    'CLI_PACKAGE_NAME', 'github.com/urfave/cli'
-)
-
-
-def main(sysargs=sys.argv[:]):
-    targets = {
-        'vet': _vet,
-        'test': _test,
-        'gfmrun': _gfmrun,
-        'toc': _toc,
-        'gen': _gen,
-    }
-
-    parser = argparse.ArgumentParser()
-    parser.add_argument(
-        'target', nargs='?', choices=tuple(targets.keys()), default='test'
-    )
-    args = parser.parse_args(sysargs[1:])
-
-    targets[args.target]()
-    return 0
-
-
-def _test():
-    if check_output('go version'.split()).split()[2] < 'go1.2':
-        _run('go test -v .')
-        return
-
-    coverprofiles = []
-    for subpackage in ['', 'altsrc']:
-        coverprofile = 'cli.coverprofile'
-        if subpackage != '':
-            coverprofile = '{}.coverprofile'.format(subpackage)
-
-        coverprofiles.append(coverprofile)
-
-        _run('go test -v'.split() + [
-            '-coverprofile={}'.format(coverprofile),
-            ('{}/{}'.format(PACKAGE_NAME, subpackage)).rstrip('/')
-        ])
-
-    combined_name = _combine_coverprofiles(coverprofiles)
-    _run('go tool cover -func={}'.format(combined_name))
-    os.remove(combined_name)
-
-
-def _gfmrun():
-    go_version = check_output('go version'.split()).split()[2]
-    if go_version < 'go1.3':
-        print('runtests: skip on {}'.format(go_version), file=sys.stderr)
-        return
-    _run(['gfmrun', '-c', str(_gfmrun_count()), '-s', 'README.md'])
-
-
-def _vet():
-    _run('go vet ./...')
-
-
-def _toc():
-    _run('node_modules/.bin/markdown-toc -i README.md')
-    _run('git diff --exit-code')
-
-
-def _gen():
-    go_version = check_output('go version'.split()).split()[2]
-    if go_version < 'go1.5':
-        print('runtests: skip on {}'.format(go_version), file=sys.stderr)
-        return
-
-    _run('go generate ./...')
-    _run('git diff --exit-code')
-
-
-def _run(command):
-    if hasattr(command, 'split'):
-        command = command.split()
-    print('runtests: {}'.format(' '.join(command)), file=sys.stderr)
-    check_call(command)
-
-
-def _gfmrun_count():
-    with open('README.md') as infile:
-        lines = infile.read().splitlines()
-        return len(filter(_is_go_runnable, lines))
-
-
-def _is_go_runnable(line):
-    return line.startswith('package main')
-
-
-def _combine_coverprofiles(coverprofiles):
-    combined = tempfile.NamedTemporaryFile(
-        suffix='.coverprofile', delete=False
-    )
-    combined.write('mode: set\n')
-
-    for coverprofile in coverprofiles:
-        with open(coverprofile, 'r') as infile:
-            for line in infile.readlines():
-                if not line.startswith('mode: '):
-                    combined.write(line)
-
-    combined.flush()
-    name = combined.name
-    combined.close()
-    return name
-
-
-if __name__ == '__main__':
-    sys.exit(main())