convert/gnuarch: parse continuation-of revisions in gnuarch source In GNU Arch, continuation-of was often used for: - tagging revisions - continue working on a project in a new archive, because arch was scaling poorly in revision numbers (cat-logs were slow to be parsed and scanned through) - very similar to the previous point, fork his own branch of a project. Parsing this header information will allow to 'follow' new history because it often hints at older/forked/personal revision trees. This patch however just implements the parsing of the continuation-of header. A followup patch will implement the proper use of this new information.

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% test multiple merges at once

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initializing destination source-hg repository

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scanning source...

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sorting...

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converting...

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4 Initial add

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3 Added branch1 file

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2 Added parent file

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1 Added brach2 file

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0 Merged branches

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o    5 "(octopus merge fixup)" files:

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|\

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| o    4 "Merged branches" files: file-branch2

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| |\

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o---+  3 "Added brach2 file" files: file-branch2

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 / /

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| o  2 "Added parent file" files: file-parent

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| |

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o |  1 "Added branch1 file" files: file file-branch1

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|/

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o  0 "Initial add" files: file

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% manifest of tip

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644   file

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644   file-branch1

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644   file-branch2

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644   file-parent