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[PATCH v3 2/7] mergetools: vimdiff: make vimdiff3 actually work

From
Felipe Contreras <felipe.contreras@gmail.com>
Date
Aug 9, 2022, 00:45 UTC
Message-ID
<20220809004549.123020-3-felipe.contreras@gmail.com>
In-Reply-To
<20220809004549.123020-1-felipe.contreras@gmail.com>

When vimdiff3 was added in 7c147b77d3 (mergetools: add vimdiff3 mode, 2014-04-20), the description made clear the intention:

    It's similar to the default, except that the other windows are
    hidden.  This ensures that removed/added colors are still visible on
    the main merge window, but the other windows not visible.

However, in 0041797449 (vimdiff: new implementation with layout support, 2022-03-30) this was broken by generating a command that never creates windows, and therefore vim never shows the diff.

In order to show the diff, the windows need to be created first, and then when they are hidden the diff remains (if hidenoff isn't set).

The layout support implementation broke the whole purpose of vimdiff3, and simply shows MERGED, which is no different from simply opening the file with vim.

Setting the `hidden` option makes it work as intended.
Suggested-by: Fernando Ramos <greenfoo@u92.eu>
Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
---
 mergetools/vimdiff | 36 ++++++++++++++++++------------------
 1 file changed, 18 insertions(+), 18 deletions(-)
diff --git a/mergetools/vimdiff b/mergetools/vimdiff
index ea416adcaa..95d637b997 100644
--- a/mergetools/vimdiff
+++ b/mergetools/vimdiff
@@ -351,7 +351,7 @@ gen_cmd () {
 	# can't simply append the command to the previous "-c" string as
 	# explained here: https://github.com/vim/vim/issues/9076
 
-	FINAL_CMD="-c \"$CMD\" -c \"tabfirst\""
+	FINAL_CMD="-c \"set hidden | $CMD\" -c \"tabfirst\""
 }
 
 
@@ -555,22 +555,22 @@ run_unit_tests () {
 	TEST_CASE_15="  ((  (LOCAL , BASE , REMOTE) / MERGED))   +(BASE)   , LOCAL+ BASE , REMOTE+ (((LOCAL / BASE / REMOTE)) ,    MERGED   )  "
 	TEST_CASE_16="LOCAL,BASE,REMOTE / MERGED + BASE,LOCAL + BASE,REMOTE + (LOCAL / BASE / REMOTE),MERGED"
 
-	EXPECTED_CMD_01="-c \"echo | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabdo windo diffthis\" -c \"tabfirst\""
-	EXPECTED_CMD_02="-c \"echo | leftabove vertical split | 1b | wincmd l | 3b | tabdo windo diffthis\" -c \"tabfirst\""
-	EXPECTED_CMD_03="-c \"echo | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 4b | wincmd l | 3b | tabdo windo diffthis\" -c \"tabfirst\""
-	EXPECTED_CMD_04="-c \"echo | 4b | bufdo diffthis\" -c \"tabfirst\""
-	EXPECTED_CMD_05="-c \"echo | leftabove split | 1b | wincmd j | leftabove split | 4b | wincmd j | 3b | tabdo windo diffthis\" -c \"tabfirst\""
-	EXPECTED_CMD_06="-c \"echo | leftabove vertical split | leftabove split | 1b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
-	EXPECTED_CMD_07="-c \"echo | leftabove vertical split | 4b | wincmd l | leftabove split | 1b | wincmd j | 3b | tabdo windo diffthis\" -c \"tabfirst\""
-	EXPECTED_CMD_08="-c \"echo | leftabove split | leftabove vertical split | 1b | wincmd l | 3b | wincmd j | 4b | tabdo windo diffthis\" -c \"tabfirst\""
-	EXPECTED_CMD_09="-c \"echo | leftabove split | 4b | wincmd j | leftabove vertical split | 1b | wincmd l | 3b | tabdo windo diffthis\" -c \"tabfirst\""
-	EXPECTED_CMD_10="-c \"echo | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
-	EXPECTED_CMD_11="-c \"echo | -tabnew | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 1b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnext | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
-	EXPECTED_CMD_12="-c \"echo | leftabove vertical split | leftabove split | leftabove vertical split | 1b | wincmd l | 3b | wincmd j | 2b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
-	EXPECTED_CMD_13="-c \"echo | leftabove vertical split | leftabove split | leftabove vertical split | 1b | wincmd l | 3b | wincmd j | 2b | wincmd l | leftabove vertical split | leftabove split | 1b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
-	EXPECTED_CMD_14="-c \"echo | -tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnext | leftabove vertical split | 2b | wincmd l | 1b | tabdo windo diffthis\" -c \"tabfirst\""
-	EXPECTED_CMD_15="-c \"echo | -tabnew | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 1b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnext | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
-	EXPECTED_CMD_16="-c \"echo | -tabnew | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 1b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnext | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
+	EXPECTED_CMD_01="-c \"set hidden | echo | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabdo windo diffthis\" -c \"tabfirst\""
+	EXPECTED_CMD_02="-c \"set hidden | echo | leftabove vertical split | 1b | wincmd l | 3b | tabdo windo diffthis\" -c \"tabfirst\""
+	EXPECTED_CMD_03="-c \"set hidden | echo | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 4b | wincmd l | 3b | tabdo windo diffthis\" -c \"tabfirst\""
+	EXPECTED_CMD_04="-c \"set hidden | echo | 4b | bufdo diffthis\" -c \"tabfirst\""
+	EXPECTED_CMD_05="-c \"set hidden | echo | leftabove split | 1b | wincmd j | leftabove split | 4b | wincmd j | 3b | tabdo windo diffthis\" -c \"tabfirst\""
+	EXPECTED_CMD_06="-c \"set hidden | echo | leftabove vertical split | leftabove split | 1b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
+	EXPECTED_CMD_07="-c \"set hidden | echo | leftabove vertical split | 4b | wincmd l | leftabove split | 1b | wincmd j | 3b | tabdo windo diffthis\" -c \"tabfirst\""
+	EXPECTED_CMD_08="-c \"set hidden | echo | leftabove split | leftabove vertical split | 1b | wincmd l | 3b | wincmd j | 4b | tabdo windo diffthis\" -c \"tabfirst\""
+	EXPECTED_CMD_09="-c \"set hidden | echo | leftabove split | 4b | wincmd j | leftabove vertical split | 1b | wincmd l | 3b | tabdo windo diffthis\" -c \"tabfirst\""
+	EXPECTED_CMD_10="-c \"set hidden | echo | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
+	EXPECTED_CMD_11="-c \"set hidden | echo | -tabnew | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 1b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnext | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
+	EXPECTED_CMD_12="-c \"set hidden | echo | leftabove vertical split | leftabove split | leftabove vertical split | 1b | wincmd l | 3b | wincmd j | 2b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
+	EXPECTED_CMD_13="-c \"set hidden | echo | leftabove vertical split | leftabove split | leftabove vertical split | 1b | wincmd l | 3b | wincmd j | 2b | wincmd l | leftabove vertical split | leftabove split | 1b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
+	EXPECTED_CMD_14="-c \"set hidden | echo | -tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnext | leftabove vertical split | 2b | wincmd l | 1b | tabdo windo diffthis\" -c \"tabfirst\""
+	EXPECTED_CMD_15="-c \"set hidden | echo | -tabnew | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 1b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnext | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
+	EXPECTED_CMD_16="-c \"set hidden | echo | -tabnew | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | 2b | wincmd l | 3b | wincmd j | 4b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 1b | tabnext | -tabnew | leftabove vertical split | 2b | wincmd l | 3b | tabnext | leftabove vertical split | leftabove split | 1b | wincmd j | leftabove split | 2b | wincmd j | 3b | wincmd l | 4b | tabdo windo diffthis\" -c \"tabfirst\""
 
 	EXPECTED_TARGET_01="MERGED"
 	EXPECTED_TARGET_02="LOCAL"
@@ -635,7 +635,7 @@ run_unit_tests () {
 	cat >expect <<-\EOF
 	-f
 	-c
-	echo | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | quit | wincmd l | 2b | wincmd j | 3b | tabdo windo diffthis
+	set hidden | echo | leftabove split | leftabove vertical split | 1b | wincmd l | leftabove vertical split | quit | wincmd l | 2b | wincmd j | 3b | tabdo windo diffthis
 	-c
 	tabfirst
 	lo cal
-- 
2.37.1
Previous: Felipe ContrerasNext: Felipe Contreras
Message 3 of 13 in “mergetools: vimdiff: regression fixes and improvements”
  1. 0/7 mergetools: vimdiff: regression fixes and improvementsFelipe Contreras, Aug 9, 2022
  2. 1/7 mergetools: vimdiff: fix commentFelipe Contreras, Aug 9, 2022
  3. 2/7 mergetools: vimdiff: make vimdiff3 actually workFelipe Contreras, Aug 9, 2022
  4. 3/7 mergetools: vimdiff: silence annoying messagesFelipe Contreras, Aug 9, 2022
  5. 4/7 mergetools: vimdiff: fix for diffoptFelipe Contreras, Aug 9, 2022
  6. 6/7 mergetools: vimdiff: rework tab logicFelipe Contreras, Aug 9, 2022
  7. 5/7 mergetools: vimdiff: fix single window layoutsFelipe Contreras, Aug 9, 2022
  8. 7/7 mergetools: vimdiff: restore selective diff modeFelipe Contreras, Aug 9, 2022
  9. Felipe ContrerasAug 9, 2022
  10. Fernando RamosAug 9, 2022
  11. Felipe ContrerasAug 9, 2022
  12. Junio C HamanoAug 10, 2022
  13. Junio C HamanoAug 10, 2022

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