chg: allows default hg path to be overridden
Before this patch, chg will fall back to "hg" if neither CHGHG nor HG are set.
This may have trouble if the "hg" in PATH is not compatible with chg, which
can happen, for example, an old hg is installed in a virtualenv.
Since it's very hard to do a quick hg version check from chg, after discussion
in IRC with smf and marmoute, the quickest solution is to build a package with
a hardcoded absolute hg path in chg. This patch makes it possible by adding a
C macro HGPATH.
%include paper/map
footer = ../paper/footer.tmpl
search = ../paper/search.tmpl
changelog = ../paper/shortlog.tmpl
shortlog = ../paper/shortlog.tmpl
shortlogentry = ../paper/shortlogentry.tmpl
graph = ../paper/graph.tmpl
help = ../paper/help.tmpl
helptopics = ../paper/helptopics.tmpl
diffstatlink = ../paper/diffstat.tmpl
diffstatnolink = ../paper/diffstat.tmpl
changelogentry = ../paper/shortlogentry.tmpl
searchentry = ../paper/shortlogentry.tmpl
changeset = ../paper/changeset.tmpl
manifest = ../paper/manifest.tmpl
filerevision = ../paper/filerevision.tmpl
fileannotate = ../paper/fileannotate.tmpl
filediff = ../paper/filediff.tmpl
filecomparison = ../paper/filecomparison.tmpl
filelog = ../paper/filelog.tmpl
filelogentry = ../paper/filelogentry.tmpl
tags = ../paper/tags.tmpl
bookmarks = ../paper/bookmarks.tmpl
branches = ../paper/branches.tmpl
index = ../paper/index.tmpl
notfound = ../paper/notfound.tmpl
error = ../paper/error.tmpl