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[[TableOfContents]]

=== Make a clean copy of a source tree, like CVS export ===

{{{
hg clone source export
rm -rf export/.hg
}}}

=== The same thing, but for a tagged release ===

{{{
hg clone --noupdate source export-tagged
cd export-tagged
hg update mytag
rm -rf .hg
}}}

=== See diffs when editing commit message with VIM ===

Make a private copy of the 'hgeditor' script provided with mercurial and replace the call to the editor with following command:

{{{
vim "+e $HGTMP/diff" '+set buftype=help filetype=diff' "+vsplit $HGTMP/msg" || exit $?
}}}

This will start up VIM in vertical split mode with commit message in the left pane and diff in the right pane. The {{{buftype=help}}} setting for diff window tells vim to exit when all other windows are closed, so when you write and quit the log with {{{:x}}} ({{{:wq}}} - they are equivalent), vim exits. If you have syntax highlight set up, the diff will be properly highlighted.

This setting is suitable for wide terminals. If you have a narrow terminal, you may want to replace the {{{+vsplit}}} above with {{{+split}}} or add {{{nowrap}}} to the {{{+set}}}.

=== See diffstat of pulled changes ===

Place the following script (named "pull-diffstat" here) somewhere in your $PATH:

{{{
#!/bin/sh
test -n "$NODE" || exit 0
PARENT=`hg parents $NODE | head -1 | awk -F':' '{print $3}'`
TIP=`hg tip | head -1 | awk -F':' '{print $3}'`
echo "diffstat for $PARENT to $TIP"
hg diff -r $PARENT -r tip | diffstat
}}}

Add a changegroup entry to the [hooks] section of hgrc:

{{{
[hooks]
changegroup = pull-diffstat
}}}

Now you will see a diffstat of the new changes to your repo every time you do "hg pull".

=== One liner to remove unknown files with a pattern ===
To make these work, replace the {{{ls -l}}} with the command you wish to execute (ie. {{{rm}}}). You can also tweak the parameters passed to {{{hg status}}} to filter by something other than unknown files (see {{{hg help status}}}).

{{{
hg status -nu0 | grep -z pattern | xargs -0r ls -l
}}}

The above command requires a current version of GNU grep. If you don't have one, you can use the following:
{{{
hg status -nu | grep pattern | tr '\n' '\0' | xargs -0r ls -l
}}}

=== Keyword expansion according to file revision ===

This is an example on how you can achieve filewise keyword expansion (similar
to CVS) with [decode] and [encode] filters, and the pretxncommit-hook. This
comes in handy when you want to keep track of different file revisions in the
same repository.

For demonstration we use just one keyword: "Hg". As [decode] and [encode] work
only on a stream you'll have to include the filename ''manually'' once.

Accepted formats are:

 * {{{$Hg$}}} (without filename "expansion")
 * {{{$Hg: <filename>,v$}}}

You also have the choice between two date output formats:

 * Generic Mercurial output
 * YYYY/mm/dd (called 'slashday' here)

With the scripts called "hgfilter.sh" and "hgpretxncommit.sh" put in your
$PATH a simple setup could have the following entries in hgrc:

{{{
[decode]
*.txt = hgfilter.sh decode
*.py = hgfilter.sh decode slashday
[encode]
*.txt = hgfilter.sh
*.py = hgfilter.sh
[hooks]
pretxncommit = hgpretxncommit.sh
}}}

Here's the filter script "hgfilter.sh":

{{{
#!/bin/sh
set -e
decode=
slashday=
for i; do
    case "$i" in
        decode) decode=true; shift ;;
        slashday) slashday=true; shift ;;
    esac
done
if [ "$decode" ]; then
    if (($# == 0)); then
        tip=`hg tip`
        cset=`echo "$tip" | awk -F ':' '/^changeset: +/ { print $3 }'`
    else
        tip="$@"
        cset="${HG_NODE:0:12}"
    fi
    if [ "$slashday" ]; then
        hgdate=`echo "$tip" |
        awk '/^date: +/ { printf "%d/%s/%0.2d %s %s", $6, $3, $4, $5, $7 }'`
        m=0
        for M in Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
        do
            let $((++m))
            hgdate=${hgdate/$M/`printf %0.2d $m`}
        done
    else
        hgdate=`echo "$tip" | awk -F ': +' '/^date: +/ { print $2 }'`
    fi
    sed -e "s!\([$]Hg\)\(:\( [^,]\{1,\},v\)\)\{0,1\}[$]!\1:\3 $cset $hgdate \$!"
else
    sed -e 's!\([$]Hg\(: [^,]\{1,\},v\)\{0,1\}\)[^$]*[$]!\1\$!'
fi
exit $?
}}}

In "hgpretxncommit.sh" you have to tweak the 'excl' and 'slash' variables
according to your needs. Supposing above [decode] settings in hgrc the 'slash'
pattern includes files with suffix ".py".

{{{
#!/bin/sh
set -e
test $? -eq 0 || exit 1
sl=""
excl='^\.hg\|\.\(p\(df\|ng\)\|jpg\)$'
slash='\.\(tex\|s\(ty\|h\)\|c\(fg\|ls\)\|bib\|py\|awk\)$'
tipv=`hg tip --verbose`
manifest=`hg manifest | cut -d ' ' -f 3`
for f in `echo "$tipv" | awk -F ': +' '/^files: +/ { print $2 }'`
do
    if echo "$f" | grep -v -q "$excl" && echo "$manifest" | grep -x -q "$f"
    then
        echo "$f" | grep -q "$slash" && sl='slashday'
        hg cat "$f" | hgfilter.sh decode $sl "$tipv" > "$f"
    fi
done
exit $?
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TipsAndTricks (last edited 2016-12-05 11:14:36 by ArneBab)