annotate docker/base/scripts/add_host @ 105:b69056368901
docker: images optimisation:
- reduced the number of layers by grouping many instructions
- moved stuff which don't change a lot at the beginning, and hg/apt at the end
- scripts are not now in scripts/ subdirectories
- prosody.cfg.lua is added using ADD instead of getting it online
- .hg/dirstate is copied in base (backend) and libervia, so mercurial revision is known
- removed lot of useless WORKDIR instruction, they are replaced by "cd" inside RUN instructions
- cleaning (apt-clean, rm) is done on the same instruction as the one than generate the data, to avoid useless data in layers
| author |
Goffi <goffi@goffi.org> |
| date |
Sun, 28 Feb 2016 02:01:20 +0100 |
| parents |
|
| children |
12cb931dbea0 |
| rev |
line source |
|
105
|
1 #!/usr/bin/env python2 |
|
|
2 # this script add aliases to /etc/hosts |
|
|
3 import sys, re |
|
|
4 |
|
|
5 if len(sys.argv) < 2 or len(sys.argv) > 3: |
|
|
6 sys.exit(1) |
|
|
7 |
|
|
8 host = sys.argv[1] |
|
|
9 alias = sys.argv[2] if len(sys.argv) == 3 else "localhost" |
|
|
10 |
|
|
11 if host == "localhost" or host == alias: |
|
|
12 sys.exit(0) |
|
|
13 |
|
|
14 print "Adding host {} as an alias of {}".format(host, alias) |
|
|
15 with open("/etc/hosts", "r+") as f: |
|
|
16 buf = re.sub(r"\\b{}\\b".format(alias), "{}\\t{}".format(alias, host), f.read(), 1) |
|
|
17 f.seek(0) |
|
|
18 f.write(buf) |
