changeset 1563:171c31a5cca4 live

A script to flatten an Hg repo with subrepos into one without. Not currently used.

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/extra/soundsoftware/flatten.sh	Wed Jan 20 15:03:23 2016 +0000
@@ -0,0 +1,82 @@
+#!/bin/bash
+#
+# Convert an Hg repo with subrepos into a new repo in which the
+# subrepo contents are included in the main repo. The history of the
+# original and its subrepos is retained.
+#
+# Note that this script invokes itself, in order to handle nested
+# subrepos.
+#
+# While this does work, I'm not convinced it's entirely a good
+# idea. The history ends up a bit of a mess, and if it's a preliminary
+# to converting to git (which is one obvious reason to do this), the
+# history ends up even messier after that conversion.
+
+set -ex
+
+repo="$1"
+target="$2"
+target_subdir="$3"
+revision="$4"
+
+if [ -z "$repo" ] || [ -z "$target" ]; then
+    echo "usage: $0 <repo-url> <target-dir> [<target-subdir> <revision>]"
+    exit 2
+fi
+
+set -u
+
+myname="$0"
+mydir=$(dirname "$myname")
+
+reponame=$(basename "$repo")
+tmpdir="/tmp/flatten_$$"
+mkdir -p "$tmpdir"
+trap "rm -rf ${tmpdir}" 0
+
+filemap="$tmpdir/filemap"
+tmprepo="$tmpdir/tmprepo"
+subtmp="$tmpdir/subtmp"
+
+if [ -n "$revision" ]; then
+    hg clone -r "$revision" "$repo" "$tmprepo"
+else
+    hg clone "$repo" "$tmprepo"
+fi
+
+read_sub() {
+    if [ -f "$tmprepo/.hgsub" ]; then
+	cat "$tmprepo/.hgsub" | sed 's/ *= */,/'
+    fi
+}
+
+(   echo "exclude .hgsub"
+    echo "exclude .hgsubstate"
+    read_sub | while IFS=, read dir uri; do
+	echo "exclude $dir"
+    done
+    if [ -n "$target_subdir" ]; then
+	echo "rename . $target_subdir"
+    fi
+) > "$filemap"
+
+hg convert --filemap "$filemap" "$tmprepo" "$target"
+(   cd "$target"
+    hg update
+)
+
+read_sub | while IFS=, read dir uri; do
+    rm -rf "$subtmp"
+    revision=$(grep ' '"$dir"'$' "$tmprepo/.hgsubstate" | awk '{ print $1; }')
+    if [ -n "$target_subdir" ]; then
+	"$myname" "$tmprepo/$dir" "$subtmp" "$target_subdir/$dir" "$revision"
+    else
+	"$myname" "$tmprepo/$dir" "$subtmp" "$dir" "$revision"
+    fi
+    (   cd "$target"
+	hg pull -f "$subtmp" &&
+	    hg merge --tool internal:local &&
+	    hg commit -m "Merge former subrepo $dir"
+    )
+done
+