obsdiscovery: adopt to calling convention change
Upstream commits 71d83b315778 and abce899c985f changed the calling
convention of setdiscovery._takefullsample().
We inspect the signature of the function before calling it so
we can pass the proper arguments.
$ . "$TESTDIR/testlib/topic_setup.sh"
$ hg init pinky
$ cd pinky
$ cat <<EOF >> .hg/hgrc
> [phases]
> publish=false
> EOF
$ cat <<EOF >> $HGRCPATH
> [experimental]
> # disable the new graph style until we drop 3.7 support
> graphstyle.missing = |
> EOF
$ hg help -e topic
topic extension - support for topic branches
Topic branches are lightweight branches which disappear when changes are
finalized (move to the public phase).
Compared to bookmark, topic is reference carried by each changesets of the
series instead of just the single head revision. Topic are quite similar to
the way named branch work, except they eventually fade away when the changeset
becomes part of the immutable history. Changeset can belong to both a topic
and a named branch, but as long as it is mutable, its topic identity will
prevail. As a result, default destination for 'update', 'merge', etc... will
take topic into account. When a topic is active these operations will only
consider other changesets on that topic (and, in some occurrence, bare
changeset on same branch). When no topic is active, changeset with topic will
be ignored and only bare one on the same branch will be taken in account.
There is currently two commands to be used with that extension: 'topics' and
'stack'.
The 'hg topics' command is used to set the current topic, change and list
existing one. 'hg topics --verbose' will list various information related to
each topic.
The 'stack' will show you information about the stack of commit belonging to
your current topic.
Topic is offering you aliases reference to changeset in your current topic
stack as 's#'. For example, 's1' refers to the root of your stack, 's2' to the
second commits, etc. The 'hg stack' command show these number. 's0' can be
used to refer to the parent of the topic root. Updating using 'hg up s0' will
keep the topic active.
Push behavior will change a bit with topic. When pushing to a publishing
repository the changesets will turn public and the topic data on them will
fade away. The logic regarding pushing new heads will behave has before,
ignore any topic related data. When pushing to a non-publishing repository
(supporting topic), the head checking will be done taking topic data into
account. Push will complain about multiple heads on a branch if you push
multiple heads with no topic information on them (or multiple public heads).
But pushing a new topic will not requires any specific flag. However, pushing
multiple heads on a topic will be met with the usual warning.
The 'evolve' extension takes 'topic' into account. 'hg evolve --all' will
evolve all changesets in the active topic. In addition, by default. 'hg next'
and 'hg prev' will stick to the current topic.
Be aware that this extension is still an experiment, commands and other
features are likely to be change/adjusted/dropped over time as we refine the
concept.
topic-mode
==========
The topic extension can be configured to ensure the user do not forget to add
a topic when committing a new topic:
[experimental]
# behavior when commit is made without an active topic
topic-mode = ignore # do nothing special (default)
topic-mode = warning # print a warning
topic-mode = enforce # abort the commit (except for merge)
topic-mode = enforce-all # abort the commit (even for merge)
topic-mode = random # use a randomized generated topic (except for merge)
topic-mode = random-all # use a randomized generated topic (even for merge)
Single head enforcing
=====================
The extensions come with an option to enforce that there is only one heads for
each name in the repository at any time.
[experimental]
enforce-single-head = yes
Publishing behavior
===================
Topic vanish when changeset move to the public phases. Moving to the public
phase usually happens on push, but it is possible to update that behavior. The
server needs to have specific config for this.
* everything pushed become public (the default):
[phase]
publish = yes
* nothing push turned public:
[phase]
publish = no
* topic branches are not published, changeset without topic are:
[phase]
publish = no
[experimental]
topic.publish-bare-branch = yes
In addition, the topic extension adds a "--publish" flag on 'hg push'. When
used, the pushed revisions are published if the push succeeds. It also applies
to common revisions selected by the push.
list of commands:
stack list all changesets in a topic and other information
topics View current topic, set current topic, change topic for a set
of revisions, or see all topics.
(use 'hg help -v topic' to show built-in aliases and global options)
$ hg help topics
hg topics [TOPIC]
View current topic, set current topic, change topic for a set of revisions, or
see all topics.
Clear topic on existing topiced revisions:
hg topics --rev <related revset> --clear
Change topic on some revisions:
hg topics <newtopicname> --rev <related revset>
Clear current topic:
hg topics --clear
Set current topic:
hg topics <topicname>
List of topics:
hg topics
List of topics sorted according to their last touched time displaying last
touched time and the user who last touched the topic:
hg topics --age
The active topic (if any) will be prepended with a "*".
The '--current' flag helps to take active topic into account. For example,
if you want to set the topic on all the draft changesets to the active
topic, you can do: 'hg topics -r "draft()" --current'
The --verbose version of this command display various information on the
state of each topic.
options ([+] can be repeated):
--clear clear active topic if any
-r --rev REV [+] revset of existing revisions
-l --list show the stack of changeset in the topic
--age show when you last touched the topics
--current display the current topic only
(some details hidden, use --verbose to show complete help)
$ hg topics
Test topics interaction with evolution:
$ hg topics --config experimental.evolution=
$ hg topics --config experimental.evolution= --rev . bob
abort: must have obsolete enabled to change topics
[255]
Create some changes:
$ for x in alpha beta gamma delta ; do
> echo file $x >> $x
> hg addremove
> hg ci -m "Add file $x"
> done
adding alpha
adding beta
adding gamma
adding delta
Still no topics
$ hg topics
$ hg topics --current
no active topic
[1]
$ hg topics --current somerandomtopic
abort: cannot use --current when setting a topic
[255]
$ hg topics --current --clear
abort: cannot use --current and --clear
[255]
$ hg topics --clear somerandomtopic
abort: cannot use --clear when setting a topic
[255]
Trying some invalid topicnames
$ hg topic '.'
abort: the name '.' is reserved
[255]
$ hg topic null
abort: the name 'null' is reserved
[255]
$ hg topic tip
abort: the name 'tip' is reserved
[255]
$ hg topic 12345
abort: cannot use an integer as a name
[255]
$ hg topic ' '
abort: topic name cannot consist entirely of whitespaces
[255]
$ hg topic 'a12#45'
abort: invalid topic name: 'a12#45'
(topic names can only consist of alphanumeric, '-' '_' and '.' characters)
[255]
$ hg topic 'foo bar'
abort: invalid topic name: 'foo bar'
(topic names can only consist of alphanumeric, '-' '_' and '.' characters)
[255]
this is trying to list topic names
$ hg topic ''
$ hg topic '*12 B23'
abort: invalid topic name: '*12 B23'
(topic names can only consist of alphanumeric, '-' '_' and '.' characters)
[255]
Test commit flag and help text
$ echo stuff >> alpha
$ HGEDITOR=cat hg ci -t topicflag
HG: Enter commit message. Lines beginning with 'HG:' are removed.
HG: Leave message empty to abort commit.
HG: --
HG: user: test
HG: topic 'topicflag'
HG: branch 'default'
HG: changed alpha
abort: empty commit message
[255]
$ hg revert alpha
$ hg topic
* topicflag (0 changesets)
Make a topic
$ hg topic narf
$ hg topics
* narf (0 changesets)
$ hg topics -v
* narf (on branch: default, 0 changesets)
$ hg stack
### topic: narf
### target: default (branch)
(stack is empty)
s0^ Add file delta (base current)
Add commits to topic
$ echo topic work >> alpha
$ hg ci -m 'start on narf'
active topic 'narf' grew its first changeset
(see 'hg help topics' for more information)
$ hg co .^
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg topic fran
marked working directory as topic: fran
$ hg topics
* fran (0 changesets)
narf (1 changesets)
$ hg topics --current
fran
$ echo >> fran work >> beta
$ hg ci -m 'start on fran'
active topic 'fran' grew its first changeset
(see 'hg help topics' for more information)
$ hg co narf
switching to topic narf
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg topic
fran (1 changesets)
* narf (1 changesets)
$ hg log -r . -T '{topics}\n'
narf
$ echo 'narf!!!' >> alpha
$ hg ci -m 'narf!'
$ hg log -G
@ changeset: 6:7c34953036d6
| tag: tip
| topic: narf
| parent: 4:fb147b0b417c
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: narf!
|
| o changeset: 5:0469d521db49
| | topic: fran
| | parent: 3:a53952faf762
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | summary: start on fran
| |
o | changeset: 4:fb147b0b417c
|/ topic: narf
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: start on narf
|
o changeset: 3:a53952faf762
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: Add file delta
|
o changeset: 2:15d1eb11d2fa
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: Add file gamma
|
o changeset: 1:c692ea2c9224
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: Add file beta
|
o changeset: 0:c2b7d2f7d14b
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Add file alpha
Exchanging of topics:
$ cd ..
$ hg init brain
$ hg -R pinky push -r 4 brain
pushing to brain
searching for changes
adding changesets
adding manifests
adding file changes
added 5 changesets with 5 changes to 4 files
Export
$ hg -R pinky export
# HG changeset patch
# User test
# Date 0 0
# Thu Jan 01 00:00:00 1970 +0000
# Node ID 7c34953036d6a36eae468c550d0592b89ee8bffc
# Parent fb147b0b417c25ca15547cd945acf51cf8dcaf02
# EXP-Topic narf
narf!
diff -r fb147b0b417c -r 7c34953036d6 alpha
--- a/alpha Thu Jan 01 00:00:00 1970 +0000
+++ b/alpha Thu Jan 01 00:00:00 1970 +0000
@@ -1,2 +1,3 @@
file alpha
topic work
+narf!!!
Import
$ hg -R pinky export > narf.diff
$ hg -R pinky --config extensions.strip= strip .
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
saved backup bundle to $TESTTMP/pinky/.hg/strip-backup/7c34953036d6-1ff3bae2-backup.hg (glob)
$ hg -R pinky import narf.diff
applying narf.diff
$ hg -R pinky log -r .
changeset: 6:7c34953036d6
tag: tip
topic: narf
parent: 4:fb147b0b417c
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: narf!
Now that we've pushed to brain, the work done on narf is no longer a
draft, so we won't see that topic name anymore:
$ hg log -R pinky -G
@ changeset: 6:7c34953036d6
| tag: tip
| topic: narf
| parent: 4:fb147b0b417c
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: narf!
|
| o changeset: 5:0469d521db49
| | topic: fran
| | parent: 3:a53952faf762
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | summary: start on fran
| |
o | changeset: 4:fb147b0b417c
|/ user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: start on narf
|
o changeset: 3:a53952faf762
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: Add file delta
|
o changeset: 2:15d1eb11d2fa
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: Add file gamma
|
o changeset: 1:c692ea2c9224
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: Add file beta
|
o changeset: 0:c2b7d2f7d14b
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Add file alpha
$ cd brain
$ hg co tip
4 files updated, 0 files merged, 0 files removed, 0 files unresolved
Because the change is public, we won't inherit the topic from narf.
$ hg topic
$ echo what >> alpha
$ hg topic query
marked working directory as topic: query
$ hg ci -m 'what is narf, pinky?'
active topic 'query' grew its first changeset
(see 'hg help topics' for more information)
$ hg log -Gl2
@ changeset: 5:c01515cfc331
| tag: tip
| topic: query
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: what is narf, pinky?
|
o changeset: 4:fb147b0b417c
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: start on narf
|
$ hg push -f ../pinky -r query
pushing to ../pinky
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files (+1 heads)
$ hg -R ../pinky log -Gl 4
o changeset: 7:c01515cfc331
| tag: tip
| topic: query
| parent: 4:fb147b0b417c
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: what is narf, pinky?
|
| @ changeset: 6:7c34953036d6
|/ topic: narf
| parent: 4:fb147b0b417c
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: narf!
|
| o changeset: 5:0469d521db49
| | topic: fran
| | parent: 3:a53952faf762
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | summary: start on fran
| |
o | changeset: 4:fb147b0b417c
|/ user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: start on narf
|
$ hg topics
* query (1 changesets)
$ cd ../pinky
$ hg co query
switching to topic query
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ echo answer >> alpha
$ hg ci -m 'Narf is like `zort` or `poit`!'
$ hg merge narf
merging alpha
warning: conflicts while merging alpha! (edit, then use 'hg resolve --mark')
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
[1]
$ hg revert -r narf alpha
$ hg resolve -m alpha
(no more unresolved files)
$ hg topic narf
$ hg ci -m 'Finish narf'
$ hg topics
fran (1 changesets)
* narf (2 changesets)
query (2 changesets)
$ hg debugnamecomplete # branch:topic here is a buggy side effect
default
default:fran
default:narf
default:query
fran
narf
query
tip
$ hg phase --public narf
active topic 'narf' is now empty
(use 'hg topic --clear' to clear it if needed)
POSSIBLE BUG: narf topic stays alive even though we just made all
narf commits public:
$ hg topics
fran (1 changesets)
* narf (0 changesets)
$ hg log -Gl 6
@ changeset: 9:ae074045b7a7
|\ tag: tip
| | parent: 8:54c943c1c167
| | parent: 6:7c34953036d6
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | summary: Finish narf
| |
| o changeset: 8:54c943c1c167
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | summary: Narf is like `zort` or `poit`!
| |
| o changeset: 7:c01515cfc331
| | parent: 4:fb147b0b417c
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | summary: what is narf, pinky?
| |
o | changeset: 6:7c34953036d6
|/ parent: 4:fb147b0b417c
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: narf!
|
| o changeset: 5:0469d521db49
| | topic: fran
| | parent: 3:a53952faf762
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | summary: start on fran
| |
o | changeset: 4:fb147b0b417c
|/ user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: start on narf
|
$ cd ../brain
$ hg topics
* query (1 changesets)
$ hg pull ../pinky -r narf
pulling from ../pinky
abort: unknown revision 'narf'!
[255]
$ hg pull ../pinky -r default
pulling from ../pinky
searching for changes
adding changesets
adding manifests
adding file changes
added 3 changesets with 3 changes to 1 files
new changesets 7c34953036d6:ae074045b7a7
1 local changesets published
active topic 'query' is now empty
(run 'hg update' to get a working copy)
$ hg topics
* query (0 changesets)
We can pull in the draft-phase change and we get the new topic
$ hg pull ../pinky
pulling from ../pinky
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files (+1 heads)
new changesets 0469d521db49
(run 'hg heads' to see heads)
$ hg topics
fran (1 changesets)
* query (0 changesets)
$ hg log -Gr 'draft()'
o changeset: 9:0469d521db49
| tag: tip
| topic: fran
| parent: 3:a53952faf762
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: start on fran
|
query is not an open topic, so when we clear the current topic it'll
disappear:
$ hg topics --clear
clearing empty topic "query"
$ hg topics
fran (1 changesets)
Topic revset
$ hg log -r 'topic()' -G
o changeset: 9:0469d521db49
| tag: tip
| topic: fran
| parent: 3:a53952faf762
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: start on fran
|
$ hg log -r 'not topic()' -G
o changeset: 8:ae074045b7a7
|\ parent: 7:54c943c1c167
| | parent: 6:7c34953036d6
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | summary: Finish narf
| |
| o changeset: 7:54c943c1c167
| | parent: 5:c01515cfc331
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | summary: Narf is like `zort` or `poit`!
| |
o | changeset: 6:7c34953036d6
| | parent: 4:fb147b0b417c
| | user: test
| | date: Thu Jan 01 00:00:00 1970 +0000
| | summary: narf!
| |
| @ changeset: 5:c01515cfc331
|/ user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: what is narf, pinky?
|
o changeset: 4:fb147b0b417c
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: start on narf
|
o changeset: 3:a53952faf762
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: Add file delta
|
o changeset: 2:15d1eb11d2fa
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: Add file gamma
|
o changeset: 1:c692ea2c9224
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: Add file beta
|
o changeset: 0:c2b7d2f7d14b
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: Add file alpha
No matches because narf is already closed:
$ hg log -r 'topic("narf")' -G
This regexp should match the topic `fran`:
$ hg log -r 'topic("re:.ra.")' -G
o changeset: 9:0469d521db49
| tag: tip
| topic: fran
| parent: 3:a53952faf762
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: start on fran
|
Exact match on fran:
$ hg log -r 'topic(fran)' -G
o changeset: 9:0469d521db49
| tag: tip
| topic: fran
| parent: 3:a53952faf762
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: start on fran
|
Match current topic:
$ hg topic
fran (1 changesets)
$ hg log -r 'topic(.)'
(no output is expected)
$ hg co fran
switching to topic fran
2 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg log -r 'topic(.)'
changeset: 9:0469d521db49
tag: tip
topic: fran
parent: 3:a53952faf762
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: start on fran
Using revsets in topic()
$ tlog() {
> hg log -T '{rev}: {topic}\n' -r "$1"
> }
$ tlog 'topic(9)'
9: fran
$ tlog 'topic(8)'
$ tlog 'topic(head())'
9: fran
$ tlog 'topic(:)'
9: fran
$ tlog 'topic(all())'
9: fran
$ tlog 'topic(topic(fran))'
9: fran
$ tlog 'topic(wdir())'
9: fran
$ tlog 'topic(nonsense)'
abort: unknown revision 'nonsense'!
[255]
Pattern matching in topic() revset
$ tlog 'topic("re:nonsense")'
$ tlog 'topic("literal:nonsense")'
abort: topic 'nonsense' does not exist!
[255]
Deactivate the topic.
$ hg topics
* fran (1 changesets)
$ hg topics --clear
$ hg log -r 'topic(wdir())'
$ echo fran? >> beta
$ hg ci -m 'fran?'
created new head
(consider using topic for lightweight branches. See 'hg help topic')
$ hg log -Gr 'draft()'
@ changeset: 10:4073470c35e1
| tag: tip
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: fran?
|
o changeset: 9:0469d521db49
| topic: fran
| parent: 3:a53952faf762
| user: test
| date: Thu Jan 01 00:00:00 1970 +0000
| summary: start on fran
|
$ hg topics
fran (1 changesets)
Testing for updating to s0
==========================
$ hg up fran
switching to topic fran
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg stack
### topic: fran
### target: default (branch), ambiguous rebase destination - branch 'default' has 2 heads
s1@ start on fran (current)
s0^ Add file delta (base)
$ hg up s0
preserving the current topic 'fran'
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
$ hg topic
* fran (1 changesets)
$ hg stack
### topic: fran
### target: default (branch), ambiguous rebase destination - branch 'default' has 2 heads
s1: start on fran
s0^ Add file delta (base current)
$ hg topics --age
* fran (1970-01-01 by test)
$ cd ..
Testing the new config knob to forbid untopiced commit
======================================================
$ hg init ponky
$ cd ponky
$ cat <<EOF >> .hg/hgrc
> [phases]
> publish=false
> EOF
$ cat <<EOF >> $HGRCPATH
> [experimental]
> topic-mode = enforce
> EOF
$ touch a b c d
$ hg add a
$ hg ci -m "Added a"
abort: no active topic
(see 'hg help -e topic.topic-mode' for details)
[255]
(same test, checking we abort before the editor)
$ EDITOR=cat hg ci -m "Added a" --edit
abort: no active topic
(see 'hg help -e topic.topic-mode' for details)
[255]
$ hg ci -m "added a" --config experimental.topic-mode=off
$ hg log
changeset: 0:a154386e50d1
tag: tip
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: added a
Testing the --age flag for `hg topics`
======================================
$ hg topic topic1970 --rev 0
switching to topic topic1970
changed topic on 1 changes
$ hg add b
$ hg topic topic1990
$ hg ci -m "Added b" --config devel.default-date="631152000 0" --user "foo"
active topic 'topic1990' grew its first changeset
(see 'hg help topics' for more information)
$ hg add c
$ hg topic topic2010
$ hg ci -m "Added c" --config devel.default-date="1262304000 0" --user "bar"
active topic 'topic2010' grew its first changeset
(see 'hg help topics' for more information)
$ hg log -G
@ changeset: 3:76b16af75125
| tag: tip
| topic: topic2010
| user: bar
| date: Fri Jan 01 00:00:00 2010 +0000
| summary: Added c
|
o changeset: 2:bba5bde53608
| topic: topic1990
| user: foo
| date: Mon Jan 01 00:00:00 1990 +0000
| summary: Added b
|
o changeset: 1:e5a30a141954
topic: topic1970
parent: -1:000000000000
user: test
date: Thu Jan 01 00:00:00 1970 +0000
summary: added a
$ hg topics
topic1970 (1 changesets)
topic1990 (1 changesets)
* topic2010 (1 changesets)
$ hg topics --age
* topic2010 (2010-01-01 by bar)
topic1990 (1990-01-01 by foo)
topic1970 (1970-01-01 by test)
$ hg up topic1970
switching to topic topic1970
0 files updated, 0 files merged, 2 files removed, 0 files unresolved
$ hg topics --age
topic2010 (2010-01-01 by bar)
topic1990 (1990-01-01 by foo)
* topic1970 (1970-01-01 by test)
$ hg topics --age random
abort: cannot use --age while setting a topic
[255]
$ cd ..