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
  31 noupdate=
  32 nocommit=
  33 while [ -n "$1" ]; do
  34         arg="$1"; shift
  35         case "$arg" in
  36         --no-update)
  37                 noupdate=1;;
  38         --no-commit)
  39                 nocommit=1;;
  40         -*)
  41                 usage;;
  42         *)
  43                 names="${names:+$names }$arg";;
  44         esac
  45 done
  46
  47
  48 ## Sanity checks
  49
  50 [ -n "$names" ] || die "no branch name specified"
  51 oldnames="$names "
  52 names=
  53 while
  54         name="${oldnames%% *}"
  55         oldnames="${oldnames#* }"
  56         [ -n "$name" ]
  57 do
  58         case " $names " in *" $name "*) continue; esac
  59         git rev-parse --quiet --verify "refs/heads/$name" -- >/dev/null ||
  60         die "invalid branch name: $name"
  61         names="${names:+$names }$name"
  62 done
  63 unset oldnames
  64
  65 # Check that we are on a TopGit branch.
  66 current_name="$(verify_topgit_branch HEAD)"
  67
  68 check_cycle_name()
  69 {
  70         [ "$current_name" != "$_dep" ] ||
  71                 die "$tgname: that dependency ($newly_added) would introduce a dependency loop"
  72 }
  73
  74 check_new_dep()
  75 {
  76         [ "$1" != "$current_name" ] ||
  77                 die "$current_name cannot depend on itself."
  78         ! grep -F -q -x -e "$1" "$root_dir/.topdeps" ||
  79                 die "$tgname: $current_name already depends on $1"
  80         # deps can be non-tgish but we can't run recurse_deps() on them
  81         ref_exists "refs/$topbases/$1" || return 0
  82         no_remotes=1
  83         newly_added="$1"
  84         recurse_deps check_cycle_name "$newly_added"
  85 }
  86
  87 ## Record new dependency
  88 depend_add()
  89 {
  90         [ -z "$(git status --porcelain -- :/.topdeps)" ] ||
  91                 die ".topdeps has uncommitted changes"
  92         # We are "read-only" and cacheable until the first change
  93         tg_read_only=1
  94         v_create_ref_cache
  95         for name in $names; do
  96                 check_new_dep "$name"
  97         done
  98         [ -n "$nocommit" ] || ensure_ident_available
  99         for name in $names; do
 100                 echol "$name" >>"$root_dir/.topdeps"
 101         done
 102         git add -f "$root_dir/.topdeps"
 103         case "$names" in
 104         *" "*)
 105                 msg=".topdeps: add dependencies: $names";;
 106         *)
 107                 msg=".topdeps: add new dependency $name";;
 108         esac
 109         [ -z "$nocommit" ] || {
 110                 [ -s "$git_dir/MERGE_MSG" ] || printf '%s\n' "$msg" >"$git_dir/MERGE_MSG"
 111                 info "updated .topdeps and staged the change"
 112                 info "run \`git commit\` then \`tg update\` to complete addition"
 113                 exit 0
 114         }
 115         become_non_cacheable
 116         git commit -m "$msg" "$root_dir/.topdeps"
 117         [ -z "$noupdate" ] || {
 118                 info "be sure to run \`tg update\` at some point"
 119                 exit 0
 120         }
 121         (ensure_clean_tree) || {
 122                 warn "skipping needed \`tg update\` since worktree is dirty"
 123                 warn "be sure to run \`tg update\` when worktree is clean"
 124                 exit 1
 125         }
 126         set -- "$current_name"
 127         . "$TG_INST_CMDDIR"/tg-update
 128 }
 129
 130 depend_$subcmd