user-manual: rename "git internals" to "git concepts"

diff --git a/git-sh-setup.sh b/git-sh-setup.sh
index 7fdc912167ae25568ffe95132936323abbdba09e..185c5c6c95df389e0d7f39f47feeabbe67124e80 100755 (executable)
--- a/git-sh-setup.sh
+++ b/git-sh-setup.sh
@@ -28,12 +28,67 @@ set_reflog_action() {
        fi
 }
 
-is_bare_repository () {
-       git-repo-config --bool --get core.bare ||
-       case "$GIT_DIR" in
-       .git | */.git) echo false ;;
-       *) echo true ;;
+git_editor() {
+       : "${GIT_EDITOR:=$(git config core.editor)}"
+       : "${GIT_EDITOR:=${VISUAL:-${EDITOR}}}"
+       case "$GIT_EDITOR,$TERM" in
+       ,dumb)
+               echo >&2 "No editor specified in GIT_EDITOR, core.editor, VISUAL,"
+               echo >&2 "or EDITOR. Tried to fall back to vi but terminal is dumb."
+               echo >&2 "Please set one of these variables to an appropriate"
+               echo >&2 "editor or run $0 with options that will not cause an"
+               echo >&2 "editor to be invoked (e.g., -m or -F for git-commit)."
+               exit 1
+               ;;
        esac
+       eval "${GIT_EDITOR:=vi}" '"$@"'
+}
+
+is_bare_repository () {
+       git rev-parse --is-bare-repository
+}
+
+cd_to_toplevel () {
+       cdup=$(git rev-parse --show-cdup)
+       if test ! -z "$cdup"
+       then
+               cd "$cdup" || {
+                       echo >&2 "Cannot chdir to $cdup, the toplevel of the working tree"
+                       exit 1
+               }
+       fi
+}
+
+require_work_tree () {
+       test $(git rev-parse --is-inside-work-tree) = true ||
+       die "fatal: $0 cannot be used without a working tree."
+}
+
+get_author_ident_from_commit () {
+       pick_author_script='
+       /^author /{
+               s/'\''/'\''\\'\'\''/g
+               h
+               s/^author \([^<]*\) <[^>]*> .*$/\1/
+               s/'\''/'\''\'\'\''/g
+               s/.*/GIT_AUTHOR_NAME='\''&'\''/p
+
+               g
+               s/^author [^<]* <\([^>]*\)> .*$/\1/
+               s/'\''/'\''\'\'\''/g
+               s/.*/GIT_AUTHOR_EMAIL='\''&'\''/p
+
+               g
+               s/^author [^<]* <[^>]*> \(.*\)$/\1/
+               s/'\''/'\''\'\'\''/g
+               s/.*/GIT_AUTHOR_DATE='\''&'\''/p
+
+               q
+       }
+       '
+       encoding=$(git config i18n.commitencoding || echo UTF-8)
+       git show -s --pretty=raw --encoding="$encoding" "$1" |
+       LANG=C LC_ALL=C sed -ne "$pick_author_script"
 }
 
 if [ -z "$LONG_USAGE" ]
@@ -55,8 +110,22 @@ esac
 if [ -z "$SUBDIRECTORY_OK" ]
 then
        : ${GIT_DIR=.git}
-       GIT_DIR=$(GIT_DIR="$GIT_DIR" git-rev-parse --git-dir) || exit
+       GIT_DIR=$(GIT_DIR="$GIT_DIR" git rev-parse --git-dir) || {
+               exit=$?
+               echo >&2 "You need to run this command from the toplevel of the working tree."
+               exit $exit
+       }
 else
-       GIT_DIR=$(git-rev-parse --git-dir) || exit
+       GIT_DIR=$(git rev-parse --git-dir) || {
+           exit=$?
+           echo >&2 "Failed to find a valid git directory."
+           exit $exit
+       }
 fi
+
+test -n "$GIT_DIR" && GIT_DIR=$(cd "$GIT_DIR" && pwd) || {
+    echo >&2 "Unable to determine absolute path of git directory"
+    exit 1
+}
+
 : ${GIT_OBJECT_DIRECTORY="$GIT_DIR/objects"}