--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/tests/test-merge-partial-tool.t	Thu Jun 16 15:28:54 2022 +0200
@@ -0,0 +1,292 @@
+Test support for partial-resolution tools
+
+Create a tool that resolves conflicts after line 5 by simply dropping those
+lines (even if there are no conflicts there)
+  $ cat >> "$TESTTMP/head.sh" <<'EOF'
+  > #!/bin/sh
+  > for f in "$@"; do
+  >   head -5 $f > tmp
+  >   mv -f tmp $f
+  > done
+  > EOF
+  $ chmod +x "$TESTTMP/head.sh"
+...and another tool that keeps only the last 5 lines instead of the first 5.
+  $ cat >> "$TESTTMP/tail.sh" <<'EOF'
+  > #!/bin/sh
+  > for f in "$@"; do
+  >   tail -5 $f > tmp
+  >   mv -f tmp $f
+  > done
+  > EOF
+  $ chmod +x "$TESTTMP/tail.sh"
+
+Set up both tools to run on all patterns (the default), and let the `tail` tool
+run after the `head` tool, which means it will have no effect (we'll override it
+to test order later)
+  $ cat >> "$HGRCPATH" <<EOF
+  > [partial-merge-tools]
+  > head.executable=$TESTTMP/head.sh
+  > tail.executable=$TESTTMP/tail.sh
+  > tail.order=1
+  > EOF
+
+  $ make_commit() {
+  >   echo "$@" | xargs -n1 > file
+  >   hg add file 2> /dev/null
+  >   hg ci -m "$*"
+  > }
+
+
+Let a partial-resolution tool resolve some conflicts and leave other conflicts
+for the regular merge tool (:merge3 here)
+
+  $ hg init repo
+  $ cd repo
+  $ make_commit a b c d e f
+  $ make_commit a b2 c d e f2
+  $ hg up 0
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ make_commit a b3 c d e f3
+  created new head
+  $ hg merge 1 -t :merge3
+  merging file
+  warning: conflicts while merging file! (edit, then use 'hg resolve --mark')
+  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
+  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
+  [1]
+  $ cat file
+  a
+  <<<<<<< working copy:    e11a49d4b620 - test: a b3 c d e f3
+  b3
+  ||||||| common ancestor: 8ae8bb9cc43a - test: a b c d e f
+  b
+  =======
+  b2
+  >>>>>>> merge rev:       fbc096a40cc5 - test: a b2 c d e f2
+  c
+  d
+  e
+
+
+With premerge=keep, the partial-resolution tools runs before and doesn't see
+the conflict markers
+
+  $ hg up -C 2
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ cat >> .hg/hgrc <<EOF
+  > [merge-tools]
+  > my-local.executable = cat
+  > my-local.args = $local
+  > my-local.premerge = keep-merge3
+  > EOF
+  $ hg merge 1 -t my-local
+  merging file
+  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
+  (branch merge, don't forget to commit)
+  $ cat file
+  a
+  <<<<<<< working copy:    e11a49d4b620 - test: a b3 c d e f3
+  b3
+  ||||||| common ancestor: 8ae8bb9cc43a - test: a b c d e f
+  b
+  =======
+  b2
+  >>>>>>> merge rev:       fbc096a40cc5 - test: a b2 c d e f2
+  c
+  d
+  e
+
+
+When a partial-resolution tool resolves all conflicts, the resolution should
+be recorded and the regular merge tool should not be invoked for the file.
+
+  $ hg up -C 0
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ make_commit a b c d e f2
+  created new head
+  $ hg up 0
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ make_commit a b c d e f3
+  created new head
+  $ hg merge 3 -t false
+  merging file
+  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
+  (branch merge, don't forget to commit)
+  $ cat file
+  a
+  b
+  c
+  d
+  e
+
+
+Can disable all partial merge tools (the `head` tool would have resolved this
+conflict it had been enabled)
+
+  $ hg up -C 4
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg merge 3 -t :merge3 --config merge.disable-partial-tools=yes
+  merging file
+  warning: conflicts while merging file! (edit, then use 'hg resolve --mark')
+  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
+  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
+  [1]
+  $ cat file
+  a
+  b
+  c
+  d
+  e
+  <<<<<<< working copy:    d57edaa6e21a - test: a b c d e f3
+  f3
+  ||||||| common ancestor: 8ae8bb9cc43a - test: a b c d e f
+  f
+  =======
+  f2
+  >>>>>>> merge rev:       8c217da987be - test: a b c d e f2
+
+
+Can disable one partial merge tool (the `head` tool would have resolved this
+conflict it had been enabled)
+
+  $ hg up -C 4
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg merge 3 -t :merge3 --config partial-merge-tools.head.disable=yes
+  merging file
+  warning: conflicts while merging file! (edit, then use 'hg resolve --mark')
+  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
+  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
+  [1]
+  $ cat file
+  b
+  c
+  d
+  e
+  <<<<<<< working copy:    d57edaa6e21a - test: a b c d e f3
+  f3
+  ||||||| common ancestor: 8ae8bb9cc43a - test: a b c d e f
+  f
+  =======
+  f2
+  >>>>>>> merge rev:       8c217da987be - test: a b c d e f2
+
+
+Only tools whose patterns match are run. We make `head` not match here, so
+only `tail` should run
+
+  $ hg up -C 4
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg merge 3 -t :merge3 --config partial-merge-tools.head.patterns=other
+  merging file
+  warning: conflicts while merging file! (edit, then use 'hg resolve --mark')
+  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
+  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
+  [1]
+  $ cat file
+  b
+  c
+  d
+  e
+  <<<<<<< working copy:    d57edaa6e21a - test: a b c d e f3
+  f3
+  ||||||| common ancestor: 8ae8bb9cc43a - test: a b c d e f
+  f
+  =======
+  f2
+  >>>>>>> merge rev:       8c217da987be - test: a b c d e f2
+
+
+If there are several matching tools, they are run in requested order. We move
+`head` after `tail` in order here so it has no effect (the conflict in "f" thus
+remains).
+
+  $ hg up -C 4
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg merge 3 -t :merge3 --config partial-merge-tools.head.order=2
+  merging file
+  warning: conflicts while merging file! (edit, then use 'hg resolve --mark')
+  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
+  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
+  [1]
+  $ cat file
+  b
+  c
+  d
+  e
+  <<<<<<< working copy:    d57edaa6e21a - test: a b c d e f3
+  f3
+  ||||||| common ancestor: 8ae8bb9cc43a - test: a b c d e f
+  f
+  =======
+  f2
+  >>>>>>> merge rev:       8c217da987be - test: a b c d e f2
+
+
+When using "nomerge" tools (e.g. `:other`), the partial-resolution tools
+should not be run.
+
+  $ hg up -C 4
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg merge 3 -t :other
+  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
+  (branch merge, don't forget to commit)
+  $ cat file
+  a
+  b
+  c
+  d
+  e
+  f2
+
+
+If a partial-resolution tool resolved some conflict and simplemerge can
+merge the rest, then the regular merge tool should not be used. Here we merge
+"a b c d e3 f3" with "a b2 c d e f2". The `head` tool resolves the conflict in
+"f" and the internal simplemerge merges the remaining changes in "b" and "e".
+
+  $ hg up -C 0
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ make_commit a b c d e3 f3
+  created new head
+  $ hg merge 1 -t false
+  merging file
+  0 files updated, 1 files merged, 0 files removed, 0 files unresolved
+  (branch merge, don't forget to commit)
+  $ cat file
+  a
+  b2
+  c
+  d
+  e3
+
+Test that arguments get passed as expected.
+
+  $ cat >> "$TESTTMP/log-args.sh" <<'EOF'
+  > #!/bin/sh
+  > echo "$@" > args.log
+  > EOF
+  $ chmod +x "$TESTTMP/log-args.sh"
+  $ cat >> "$HGRCPATH" <<EOF
+  > [partial-merge-tools]
+  > log-args.executable=$TESTTMP/log-args.sh
+  > EOF
+  $ hg up -C 2
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg merge 1
+  merging file
+  warning: conflicts while merging file! (edit, then use 'hg resolve --mark')
+  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
+  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
+  [1]
+  $ cat args.log
+  */hgmerge-*/file~local */hgmerge-*/file~base */hgmerge-*/file~other (glob)
+  $ hg up -C 2
+  1 files updated, 0 files merged, 0 files removed, 0 files unresolved
+  $ hg merge 1 --config partial-merge-tools.log-args.args='--other $other $base --foo --local $local --also-other $other'
+  merging file
+  warning: conflicts while merging file! (edit, then use 'hg resolve --mark')
+  0 files updated, 0 files merged, 0 files removed, 1 files unresolved
+  use 'hg resolve' to retry unresolved file merges or 'hg merge --abort' to abandon
+  [1]
+  $ cat args.log
+  --other */hgmerge-*/file~other */hgmerge-*/file~base --foo --local */hgmerge-*/file~local --also-other */hgmerge-*/file~other (glob)