tg-depend.sh

   1 #!/bin/sh
   2 # TopGit - A different patch queue manager
   3 # Copyright (C) Petr Baudis <pasky@suse.cz>  2008
   4 # Copyright (C) Kyle J. McKay <mackyle@gmail.com>  2015
   5 # All rights reserved.
   6 # GPLv2
   7
   8 USAGE="Usage: ${tgname:-tg} [...] depend add [--no-update | --no-commit] <name>..."
   9
  10 names=
  11
  12 usage()
  13 {
  14         printf '%s\n' "$USAGE" >&2
  15         exit 1
  16 }
  17
  18 ## Parse options
  19
  20 subcmd="$1"
  21 case "$subcmd" in
  22         -h|--help|"")
  23                 usage;;
  24         add)
  25                 ;;
  26         *)
  27                 die "unknown subcommand ($subcmd)";;
  28 esac
  29 shift
  30 ensure_work_tree
  31
  32 noupdate=
  33 nocommit=
  34 while [ -n "$1" ]; do
  35         arg="$1"; shift
  36         case "$arg" in
  37         --no-update)
  38                 noupdate=1;;
  39         --no-commit)
  40                 nocommit=1;;
  41         -*)
  42                 usage;;
  43         *)
  44                 names="${names:+$names }$arg";;
  45         esac
  46 done
  47
  48
  49 ## Sanity checks
  50
  51 [ -n "$names" ] || die "no branch name specified"
  52 oldnames="$names "
  53 names=
  54 while
  55         name="${oldnames%% *}"
  56         oldnames="${oldnames#* }"
  57         [ -n "$name" ]
  58 do
  59         case " $names " in *" $name "*) continue; esac
  60         git rev-parse --quiet --verify "refs/heads/$name" -- >/dev/null ||
  61         die "invalid branch name: $name"
  62         names="${names:+$names }$name"
  63 done
  64 unset oldnames
  65
  66 # Check that we are on a TopGit branch.
  67 current_name="$(verify_topgit_branch HEAD)"
  68
  69 check_cycle_name()
  70 {
  71         [ "$current_name" != "$_dep" ] ||
  72                 die "$tgname: that dependency ($newly_added) would introduce a dependency loop"
  73 }
  74
  75 check_new_dep()
  76 {
  77         [ "$1" != "$current_name" ] ||
  78                 die "$current_name cannot depend on itself."
  79         ! grep -F -q -x -e "$1" "$root_dir/.topdeps" ||
  80                 die "$tgname: $current_name already depends on $1"
  81         # deps can be non-tgish but we can't run recurse_deps() on them
  82         ref_exists "refs/$topbases/$1" || return 0
  83         no_remotes=1
  84         newly_added="$1"
  85         recurse_deps check_cycle_name "$newly_added"
  86 }
  87
  88 ## Record new dependency
  89 depend_add()
  90 {
  91         [ -z "$(git status --porcelain -- :/.topdeps)" ] ||
  92                 die ".topdeps has uncommitted changes"
  93         # We are "read-only" and cacheable until the first change
  94         tg_read_only=1
  95         v_create_ref_cache
  96         for name in $names; do
  97                 check_new_dep "$name"
  98         done
  99         [ -n "$nocommit" ] || ensure_ident_available
 100         newdepsfile="$(get_temp newdeps)"
 101         ! [ -e "$root_dir/.topdeps" ] || awk '{print}' <"$root_dir/.topdeps" >"$newdepsfile"
 102         for name in $names; do
 103                 echol "$name" >>"$newdepsfile"
 104         done
 105         cat "$newdepsfile" >"$root_dir/.topdeps"
 106         git add -f "$root_dir/.topdeps"
 107         case "$names" in
 108         *" "*)
 109                 msg=".topdeps: add dependencies: $names";;
 110         *)
 111                 msg=".topdeps: add new dependency $name";;
 112         esac
 113         [ -z "$nocommit" ] || {
 114                 [ -s "$git_dir/MERGE_MSG" ] || printf '%s\n' "$msg" >"$git_dir/MERGE_MSG"
 115                 info "updated .topdeps and staged the change"
 116                 info "run \`git commit\` then \`tg update\` to complete addition"
 117                 exit 0
 118         }
 119         become_non_cacheable
 120         git commit -m "$msg" "$root_dir/.topdeps"
 121         [ -z "$noupdate" ] || {
 122                 info "be sure to run \`tg update\` at some point"
 123                 exit 0
 124         }
 125         (ensure_clean_tree) || {
 126                 warn "skipping needed \`tg update\` since worktree is dirty"
 127                 warn "be sure to run \`tg update\` when worktree is clean"
 128                 exit 1
 129         }
 130         set -- "$current_name"
 131         . "$TG_INST_CMDDIR"/tg-update
 132 }
 133
 134 depend_$subcmd