[PATCH] Makefile: create an install-symlinks target

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Use this, for example, to do
rm -rf /opt/git
make prefix=/opt/git install
make symlinkprefix=/usr/local prefix=/opt/git install-symlinks
---
 Makefile |    9 ++++++++-
 1 files changed, 8 insertions(+), 1 deletions(-)

diff --git a/Makefile b/Makefile
index 73b487f..df2fe8d 100644
--- a/Makefile
+++ b/Makefile
@@ -142,6 +142,7 @@ ALL_LDFLAGS = $(LDFLAGS)
 STRIP ?= strip
 
 prefix = $(HOME)
+symlinkprefix = /usr/local
 bindir = $(prefix)/bin
 gitexecdir = $(bindir)
 sharedir = $(prefix)/share
@@ -996,7 +997,13 @@ install-doc:
 quick-install-doc:
 	$(MAKE) -C Documentation quick-install
 
-
+# The somewhat strange looking lines start with an ignored $(MAKE) in
+# order to be executed also in make -n calls.
+install-symlinks:
+	@: $(MAKE) && cd '$(prefix_SQ)' && find . -mindepth 1 -type d ! \( -iname 'git*' -prune -exec echo rm -rf '$(symlinkprefix)/{}' \; \) -exec echo $(INSTALL) -m 755 -d '$(symlinkprefix)/{}' \;
+	@cd '$(prefix_SQ)' && find . -mindepth 1 -type d ! \( -iname 'git*' -prune -exec rm -rf '$(symlinkprefix)/{}' \; \) -exec $(INSTALL) -m 755 -d '$(symlinkprefix)/{}' \;
+	@: $(MAKE) && cd '$(prefix_SQ)' && find . -mindepth 1 \( -type d -iname 'git*' -prune -o ! -type d \) -exec echo ln -snf '$(prefix_SQ)/{}' '$(symlinkprefix)/{}' \;
+	@cd '$(prefix_SQ)' && find . -mindepth 1 \( -type d -iname 'git*' -prune -o ! -type d \) -exec ln -snf '$(prefix_SQ)/{}' '$(symlinkprefix)/{}' \;
 
 ### Maintainer's dist rules
 
-- 
1.5.3.rc2.41.gb47b1


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