bash-completion: Add comments to remind about required arguments

Add a few simple comments above commands that take arguments. These
comments are meant to remind developers of potential problems that
can occur when the script is sourced on systems with "set -u." Any
function which requires arguments really ought to be called with
explicit arguments given.

Also adds a #!bash to the top of bash completions so that editing
software can always identify that the file is of sh type.

Signed-off-by: Ted Pavlic <ted@tedpavlic.com>
Acked-by: Shawn O. Pearce <spearce@spearce.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/contrib/completion/git-completion.bash b/contrib/completion/git-completion.bash
index 201f9a6894deb458c6f2b25626e85b4ffccaf839..f8b845a4ac9cbe14d046636b81f693874f973242 100755 (executable)
--- a/contrib/completion/git-completion.bash
+++ b/contrib/completion/git-completion.bash
@@ -1,3 +1,4 @@
+#!bash
 #
 # bash completion support for core Git.
 #
@@ -50,6 +51,8 @@ case "$COMP_WORDBREAKS" in
 *)   COMP_WORDBREAKS="$COMP_WORDBREAKS:"
 esac
 
+# __gitdir accepts 0 or 1 arguments (i.e., location)
+# returns location of .git repo
 __gitdir ()
 {
        if [ -z "${1-}" ]; then
@@ -67,6 +70,8 @@ __gitdir ()
        fi
 }
 
+# __git_ps1 accepts 0 or 1 arguments (i.e., format string)
+# returns text to add to bash PS1 prompt (includes branch name)
 __git_ps1 ()
 {
        local g="$(git rev-parse --git-dir 2>/dev/null)"
@@ -119,6 +124,7 @@ __git_ps1 ()
        fi
 }
 
+# __gitcomp_1 requires 2 arguments
 __gitcomp_1 ()
 {
        local c IFS=' '$'\t'$'\n'
@@ -131,6 +137,8 @@ __gitcomp_1 ()
        done
 }
 
+# __gitcomp accepts 1, 2, 3, or 4 arguments
+# generates completion reply with compgen
 __gitcomp ()
 {
        local cur="${COMP_WORDS[COMP_CWORD]}"
@@ -150,6 +158,7 @@ __gitcomp ()
        esac
 }
 
+# __git_heads accepts 0 or 1 arguments (to pass to __gitdir)
 __git_heads ()
 {
        local cmd i is_hash=y dir="$(__gitdir "${1-}")"
@@ -168,6 +177,7 @@ __git_heads ()
        done
 }
 
+# __git_tags accepts 0 or 1 arguments (to pass to __gitdir)
 __git_tags ()
 {
        local cmd i is_hash=y dir="$(__gitdir "${1-}")"
@@ -186,6 +196,7 @@ __git_tags ()
        done
 }
 
+# __git_refs accepts 0 or 1 arguments (to pass to __gitdir)
 __git_refs ()
 {
        local i is_hash=y dir="$(__gitdir "${1-}")"
@@ -218,6 +229,7 @@ __git_refs ()
        done
 }
 
+# __git_refs2 requires 1 argument (to pass to __git_refs)
 __git_refs2 ()
 {
        local i
@@ -226,6 +238,7 @@ __git_refs2 ()
        done
 }
 
+# __git_refs_remotes requires 1 argument (to pass to ls-remote)
 __git_refs_remotes ()
 {
        local cmd i is_hash=y
@@ -470,6 +483,7 @@ __git_aliases ()
        done
 }
 
+# __git_aliased_command requires 1 argument
 __git_aliased_command ()
 {
        local word cmdline=$(git --git-dir="$(__gitdir)" \
@@ -482,6 +496,7 @@ __git_aliased_command ()
        done
 }
 
+# __git_find_subcommand requires 1 argument
 __git_find_subcommand ()
 {
        local word subcommand c=1