[PATCH 5/5] Add infrastructure to make shellscripts translatable

["Ævar Arnfjörð Bjarmason" <avarab@gmail.com>]

Use GNU's gettext.sh in git-sh-setup if it's available, otherwise
fallback on our own custom functions.

A couple of strings in git-pull.sh are now translatable as a proof of
concept, including a multiline string.

Signed-off-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
---
 Makefile        |    7 +++++--
 git-pull.sh     |   15 ++++++++-------
 git-sh-setup.sh |   33 +++++++++++++++++++++++++++++++++
 3 files changed, 46 insertions(+), 9 deletions(-)

diff --git a/Makefile b/Makefile
index 4de0627..dce2faa 100644
--- a/Makefile
+++ b/Makefile
@@ -272,6 +272,7 @@ mandir = share/man
 infodir = share/info
 gitexecdir = libexec/git-core
 sharedir = $(prefix)/share
+localedir = $(sharedir)/locale
 template_dir = share/git-core/templates
 htmldir = share/doc/git-doc
 ifeq ($(prefix),/usr)
@@ -285,7 +286,7 @@ lib = lib
 # DESTDIR=
 pathsep = :
 
-export prefix bindir sharedir sysconfdir
+export prefix bindir sharedir localedir sysconfdir
 
 CC = gcc
 AR = ar
@@ -1455,6 +1456,7 @@ htmldir_SQ = $(subst ','\'',$(htmldir))
 prefix_SQ = $(subst ','\'',$(prefix))
 sharedir_SQ = $(subst ','\'',$(sharedir))
 
+LOCALEDIR_SQ = $(subst ','\'',$(localedir))
 SHELL_PATH_SQ = $(subst ','\'',$(SHELL_PATH))
 PERL_PATH_SQ = $(subst ','\'',$(PERL_PATH))
 PYTHON_PATH_SQ = $(subst ','\'',$(PYTHON_PATH))
@@ -1548,6 +1550,7 @@ $(RM) $@ $@+ && \
 sed -e '1s|#!.*/sh|#!$(SHELL_PATH_SQ)|' \
     -e 's|@SHELL_PATH@|$(SHELL_PATH_SQ)|' \
     -e 's/@@GIT_VERSION@@/$(GIT_VERSION)/g' \
+    -e 's|@@LOCALEDIR@@|$(LOCALEDIR_SQ)|g' \
     -e 's/@@NO_CURL@@/$(NO_CURL)/g' \
     -e $(BROKEN_PATH_FIX) \
     $@.sh >$@+
@@ -1881,7 +1884,7 @@ cscope:
 	$(FIND) . -name '*.[hcS]' -print | xargs cscope -b
 
 pot:
-	$(XGETTEXT) -k_ -o po/git.pot $(C_OBJ:o=c)
+	$(XGETTEXT) -k_ -o po/git.pot $(C_OBJ:o=c) $(SCRIPT_SH)
 
 POFILES := $(wildcard po/*.po)
 MOFILES := $(patsubst po/%.po,share/locale/%/LC_MESSAGES/git.mo,$(POFILES))
diff --git a/git-pull.sh b/git-pull.sh
index 1a4729f..22a6da2 100755
--- a/git-pull.sh
+++ b/git-pull.sh
@@ -121,8 +121,8 @@ error_on_no_merge_candidates () {
 	do
 		case "$opt" in
 		-t|--t|--ta|--tag|--tags)
-			echo "Fetching tags only, you probably meant:"
-			echo "  git fetch --tags"
+			gettext "Fetching tags only, you probably meant:"; echo
+			gettext "  git fetch --tags"; echo
 			exit 1
 		esac
 	done
@@ -154,11 +154,12 @@ error_on_no_merge_candidates () {
 		echo "a branch. Because this is not the default configured remote"
 		echo "for your current branch, you must specify a branch on the command line."
 	elif [ -z "$curr_branch" ]; then
-		echo "You are not currently on a branch, so I cannot use any"
-		echo "'branch.<branchname>.merge' in your configuration file."
-		echo "Please specify which remote branch you want to use on the command"
-		echo "line and try again (e.g. 'git pull <repository> <refspec>')."
-		echo "See git-pull(1) for details."
+        gettext "You are not currently on a branch, so I cannot use any
+'branch.<branchname>.merge' in your configuration file.
+Please specify which remote branch you want to use on the command
+line and try again (e.g. 'git pull <repository> <refspec>').
+See git-pull(1) for details.";
+        echo
 	elif [ -z "$upstream" ]; then
 		echo "You asked me to pull without telling me which branch you"
 		echo "want to $op_type $op_prep, and 'branch.${curr_branch}.merge' in"
diff --git a/git-sh-setup.sh b/git-sh-setup.sh
index 6131670..c8010f2 100644
--- a/git-sh-setup.sh
+++ b/git-sh-setup.sh
@@ -211,3 +211,36 @@ case $(uname -s) in
 	}
 	;;
 esac
+
+# Try to use libintl's gettext.sh, or fall back to English if we
+# can't.
+. gettext.sh
+if test $? -ne 0
+then
+    TEXTDOMAIN=git
+    export TEXDTOMAIN
+    TEXTDOMAINDIR="@@LOCALEDIR@@"
+    export TEXTDOMAINDIR
+else
+    # Since GNU gettext.sh isn't available we'll have to define our
+    # own dummy functions.
+
+    # This code adapted from NessusClient-1.0.2's nessusclient-mkcert
+    # by Michel Arboi <arboi@alussinan.org>. The original code is
+    # under the GPLv2.
+
+    # Not everyone has echo -n
+    case $(echo -n) in
+        \-n)    Xn=   ; Xc='\c' ;;
+        *)      Xn=-n ; Xc=
+    esac
+
+    gettext () {
+        echo $Xn "$1" $Xc
+    }
+
+    eval_gettext () {
+        eval_gettext_var="echo $1"
+        echo $Xn `eval $eval_gettext_var` $Xc
+    }
+fi
-- 
1.7.1.242.ge2b63.dirty