| author | Matt Harbison <matt_harbison@yahoo.com> |
| Tue, 27 Apr 2021 00:23:05 -0400 | |
| branch | stable |
| changeset 47015 | 96d295dd4968 |
| parent 44625 | c5653cf2811d |
| permissions | -rw-r--r-- |
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44489
ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
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1 |
Octopus Merge Support |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
2 |
===================== |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
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3 |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
4 |
This will be moderately complicated, as we'll need to synthesize phony |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
5 |
changeset entries to explode the octopus into "revisions" that only |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
6 |
have two parents each. For today, we can probably just do something like |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
7 |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
8 |
aaaaaaaaaaaaaaaaaaXX{20 bytes of exploded node's hex sha}
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
9 |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
10 |
where XX is a counter (so we could have as many as 255 parents in a |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
11 |
git commit - more than I think we'd ever see.) That means that we can |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
12 |
install some check in this extension to disallow checking out or |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
13 |
otherwise interacting with the `aaaaaaaaaaaaaaaaaa` revisions. |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
14 |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
15 |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
16 |
Interface Creation |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
17 |
==================== |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
18 |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
19 |
We at least need an interface definition for `changelog` in core that |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
20 |
this extension can satisfy, and again for `basicstore`. |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
21 |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
22 |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
23 |
Reason About Locking |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
24 |
==================== |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
25 |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
26 |
We should spend some time thinking hard about locking, especially on |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
27 |
.git/index etc. We're probably adequately locking the _git_ |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
28 |
repository, but may not have enough locking correctness in places |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
29 |
where hg does locking that git isn't aware of (notably the working |
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ad718271a9eb
git: skeleton of a new extension to _directly_ operate on git repos
Augie Fackler <augie@google.com>
parents:
diff
changeset
|
30 |
copy, which I believe Git does not lock.) |